Downgrade firmware on Epson WF-3720

It is now possible to downgrade the firmware in your WF-3720. You can now use Initial or compatible cartridges even if your printer has a firmware that blocks them.
Brand New Link to file:

[@arvidshearman]

A tip: remove your ink cartridges before doing this. After I performed the downgrade with the inks still in the printer, I kept getting the same error prompts. But when I removed the inks, run the downgrade steps as shown in the video, then reinstall the inks, it worked like a charm. Thanks for reviving my printer All In One Devices!

[@Alanball4774]

One note for anyone using this video: when Manny says at 5:52 that, after the first time running the software, " your screen may say something different," that includes the message that says non-Epson cartridges are not recognized. Don't be fooled (as I initially was) into thinking it didn't work. Continue to follow the instructions, and you will get to the promised land - a printer that once again can use anyone's ink! Thank you, Manny!

[@carolinetoth6476]

This helped too. Thank you Alan!

[@deelawson6427]

Yes but my laptop tells me the link you suggest is not safe to use, so I won't take the risk. Thanks anyway.

[@Alanball4774]

Dee Lawson I’m not suggesting any link; not sure what you’re seeing. The video you’re watching is all I’m referring to.

[@fitrox4921]

Thank you

[@lchiodi8678]

I never write reviews or comments, but this video worked perfectly, and was so easy to follow with each step matching what I was seeing on the printer or computer screen. Being able to purchase off-label printer ink saves me tremendously and I thought that option was taken away with Epson's last update. You've brought back my options as a consumer! Thank you so much for taking the time to record this video. Lifesaver!

[@rvogel317]

All in one devices is genius, amazing, I have a printer again! I can’t thank you enough. I called Epson and was not happy with them and they said there is no program to remove firmware, but Epson ink. Omg I was so ready to throw it in the trash and never buy Epson again, I CANT TELL YOU HOW HAPPY I am. And with your direction how easy it was! Thanks so much

[@Rap111unzel]

Thank you so much! You saved me a ton of headaches and money. I wanted to add to this To Cancel Firmware Updates: Right click on the printer icon in the system tray then Update Software Settings. Click to open that and change Check for Software Updates on The Internet from Check Every 2 Weeks to Never.Click OK The window that tells you to do an automatic update will no longer open so you won’t accidentally mess the printer up again. :-)

[@kennyroody]

Just wanted to share that this worked for me on March 6, 2021. Thank you for saving all the ink I purchased!

[@rachellucasbertschartandst9008]

fantastic! I ended up having to buy epson ink cartridges just to get past the silly maintenance error code screen. I also didn't even need to do the beginning part, I just downloaded the link you provided and the printers firmware downgraded...super easy. Thank you so much!!

[@chelseaclark8251]

So I'll have to buy the cartridges to get past the error?

[@dave3000ify]

WOW, I followed the instructions in the video Step-by-Step and it worked perfectly first time, nicely done!! Needless to say, I will not be purchasing Epson POS ever again. I tried to be proactive and get it updated before kids' final exams only to have Epson screw me by bricking my printer - bad business!! THANK YOU for saving the day All In One Devices

[@bigtkat2915]

THANK YOU so much. Had to use the second link. Mine took a little longer, and upon restart showed the incompatible cartridge screen, but I ignored it, continued as instructed, and it totally worked. Going now to make sure I disable firmware updates.

[@eegull]

Today (last day of 2020) I upgraded the firmware in my WF-3720 and got the dreaded "incompatible ink cartridges" message. After viewing this video and reading the comments, I replaced my half-used aftermarket cartridges with my original EPSON empties, unplugged it from my wired network, plugged a USB cable into the back of the printer, then followed this procedure to downgrade the firmware. When the printer got to the Program Update screen, it said "CLOC". After the second pass through the firmware update process completed, the printer complained about the empty cartridges but I was able to ignore that message and get to the regular operating mode. I re-installed the half-empty aftermarket cartridges. Everything is back to normal and I can finish using my aftermarket cartridges and continue to buy more. Thanks for this video, the procedure still works at the end of 2020!

[@jimodoherty]

I was so close to giving up and buying a new printer and tried this as a last resort. Thank you so much for the clear instructions, works perfectly!

[@davej3742]

Bravo! This works. Be patient and follow instructions exactly. I was getting the "incompatible cartridges" message throughout the process. Do not be alarmed--it will eventually go away at the end of the process through the two steps. I own a WF-3720 and use EZink cartridges.

[@billmellin5446]

I, like Erik Jenkins, had to run this update with Wi-Fi. The printer was displaying the 'New firmware Available' screen. When I closed it, it returned to the screen with the 'Cartridge Error' displayed. I felt maybe the error was stuck in the system, so I pulled all the cartridges and pressed button that said ink change complete. Printer realized their were no ink cartridges in it and went to install position. I reloaded the ink (which was 1 Epson Black and 3 Generics) the printer went into maintenance mode and recognized all the ink cartridges. Thank You for the Information. It was a lifesaver and thanks to Erik Jenkins for his comment about running the update with Wi-Fi while printer was in normal, not update mode. That was valuable information.

[@n2666s]

Bill, Alan; mine will not get out of the not recognizing ink cartridges mode after having done what worked for you :( will not let me install 2nd downgrade:( any advice?

[@jschreven]

Thanks so much for your video. I got it to work, somehow! I am not very computer savvy and it seemed like I missed a couple of steps, but it took my after market ink cartridge. I hate the way Epson does these updates to prevent us from using less expensive ink. We wouldn't be doing that if their ink wasn't so expensive. Good hints from other folks who commented.

[@brucea3540]

Excellent video. The process worked exactly as described with Windows 10 & USB connection. The only thing I had to do differently was that to get into program update mode I had to press in a slightly different place - halfway between the upper right corner of the screen and the upper right corner of the display box. Thank you very much!

[@ZXeno84]

Thank you. This worked for me. For those who think they get stuck on the second update: just be patient. It took over 5 minutes for my printer to restart on its own. But it eventually did, and my printer now recognizes my third party cartridges once again!

[@jamesmobley5994]

Very Nice! Process worked the first time without a hitch. Thank you for making this available.

[@mercym8125]

Omg thank you so soooo much, I was so frustrated Cus I disabled my printer and I saw so many videos and your video was so explicable and easy very good explaining. I’m so happy I had work pending and thanks to you I got it to print. God bless you for the well teaching. I’m very happy I would give you all the good ratings in the world!!!

[@angieblatt6625]

You are amazing! No more firmware updates for me.... my home office printer for work was a brick all day, totally useless after the firmware update. This worked exactly as your video shows. Thank you so much!!!!!

[@Adeoriola]

This really saved me alot of money, i was about to order the original set on epson and during my research i found this video. Thanks for sharing

[@MrFastcracker]

I was very close to jumping in the car to go and buy a new printer. THANK YOU very much for guiding me through the firmware downgrade process. My printer is back at work!

[@Sisyj666]

THANK YOU!!! I downloaded the firmware update in the middle of printing material for grad school, and it bricked my printer. said all my color cartridges were empty, and when they are really empty it won't print anything. SO stupid. but your guide did the trick. I have had this machine for about a year and have spent more on ink than I did on the printer itself. I had instant regret the first time I went to buy ink...

[@fastnoc]

You should alter your wording a little. When you 'brick' something it means you turn it into a brick. Cannot be fixed, recovered or backed out of. Thankfully that's not what happened to you. Glad you got it working though! i wasn't as lucky

[@tinasenesi1167]

Thank you for this! My printer is no longer a paperweight! I was on the verge of tossing it because I was stuck on the screen that says "Do not recognize ink, please replace." And yes, to anyone scared to use link because you get a warning that it could be unsafe...It is fine, that is a normal warning for most 3rd party downloads, you will be glad you did when you follow all steps! You'll have your printer back without Epson trying to back you into a corner for their ink!

[@jeffunruh6391]

I just want to tell you that this saved me so much money. Because I had already had 2 generic sets of cartridges, I could not print. Because we had to print, I went bought a set of 1 702XL black and the basic 702 cartridges and it was $85 and that is when I came home and found this video. I should have looked first, but it was of course an emergency to print at that time. Either way going forward this will save tons of money.

[@Sutton4774]

This video helped so much! I just got my printer today, and already accidentally installed the upgrade. It is now fixed! Very helpful! Thank you!

[@jenesis15]

I got this to work for my WF-3733 but I had to do it a different way. I didnt have to go into a different mode, I just had to connect via USB and run it while the error was up. It wouldnt recognize the printer with it in the update mode. Awesome stuff though, totally worked! Super happy.

[@paulgolin]

Worked this way for me too, and only had to run the program once, to 83%. I think the most recent firmware is different. Either way, this is a life-saver!

[@jenesis15]

Paul Golin same. I had to end task at 83%.

[@Holisticwellnesswithshaunie]

After this is completed can we use chipless cartridges in the printer.. I have same printer 3733

[@stevenv6372]

I have the Epson Workforce Pro WF-3733 which is essentially exactly the same as WF-3730 (WF-3733 is only sold at Walmart). After a firmware update, I could no longer print using my off-label ink cartridge and was getting the same error message as everyone else on this page: "Cannot recognize ink cartridge." After some googling, I found this KZbin video and decided to check it out. Today is Oct. 19, 2020 and I went through all the steps in the video about an hour ago. It took me roughly an hour to slowly implement all the steps in the video. A few time, the steps resulted in a variation of what this video shows (the video shows the steps on WF-3720) but I just followed the instructions, downloaded the file indicated, saved and executed it which installed the file on my HP laptop windows-10 (64 bit). Everything worked out exactly as shown in the video and when all was done, my printer was able to print again using the same off-label generic cartridge that I was using before and which stopped printing after the firmware upgrade. Then I changed my printer's setting to "Never update software", in order to prevent future similar issues (it's default setting was update software every 2 weeks). This is the first time ever that I am commenting on a KZbin video but I am writing this review hoping that it could help someone else.

[@chrisbuhneing3194]

If you have updated the firmware it can not be downgraded, what I did was use a Inkchip witch over-rights the firmware and allows you to use any ink cartridges you wish the only draw back are ink levels are always full which is not a big deal. I have included a link below it cost $30 bucks but with the savings on ink cartridges it more then pays for it, I am no way affiliated with this company whatsoever all I know is it worked for me. Hope this Helps good luck. inkchip.net/

[@mikeperry757]

Thank you for posting this solution. Instructions are simple and right on point. I thought there must be a way to revert to previous firmware versions after my last update rendered my current 3rd party cartridges unreadable. You are a life saver. Seriously.

[@victorinocontrerastorres1179]

I never write reviews or comments, but this video worked perfectly, and was so easy to follow with each step matching , thank you so much

[@bobpalermo3509]

Manny you are the man. For all those trying to use this video, make sure of 2 things before finishing the steps. 1. Make sure you are plugged into the USB on the rear of the printer. (You will need a USB cable that has a peripheral device connector as opposed to the standard USB.) 2. Make sure when you first reboot the printer, you end up in the screen "Program Update with WHITE letters. If you end up with RED letters in the IPL Update screen, turn off printer and try again. You have to let go of the dark screen edge and power button simultaneously very shortly after the blue light comes on. (Comment below says let go as soon as you see blue light, I had to hold a little longer and try it a few times.) Thanks Manny!!

[@EnteiIsDoge]

Thanks for the tips! I got to step 5, but the computer couldn't find the printer via the usb connection, only on the network (which fails when the printer is in update mode), even though I had a usb cable plugged into the computer on one end and the printer (on the front end) on the other. I've ordered a new usb A -> usb B cable to plug into the port on the back of the printer. Will find out in a few days if this works for me too

[@turnerjlt]

This works! I just updated my printer firmware today, 9 Sep 20, and got the unable to recognize print cartridges message. My cartridges were less than a month old with only a few pages printed. I panicked and desperately searched fixes. Found this and followed instructions exactly. It WORKED!!!! You saved my bacon. I subscribed. Thank you!!!!!

[@jadedragon3534]

Thank you sooo much!!! This worked like a charm for my WF-4734!

[@jadedragon3534]

I had to google the file on chiplesssolutions.com

[@emeprasad]

Thank you so much for your detailed video, It saved me few dollars in the ink catridges and it worked perfectly and i just followed your video just word by word. Appreciate you spending time and helping us all.

[@HotShotMaggie]

Legit for WF 3720. Follow through with instructions until the very end! I was hesitant to launch an .exe, but read enough good reviews to take the plunge. Worked perfectly. Thank you All In One!

[@frankiedeuce801]

I agree with Ryan Vogel, you guys are the real deal. This is a $250 printer, at even Walmart! I don't have that kind of money for an item I use infrequently, and the extra aggravation of purchasing overpriced proprietary ink. Kudos (plus a tip on Patreon) to you!

[@scottstaewen1356]

Thank You!! This worked perfectly and our printer is now functional and no longer bricked.

[@roophoop6372]

My PC would not read the printer in maintenance mode BUT it did read in regular mode and I was just able to do the second half of your instructions and it worked :) Bless you

[@RepEdGarner]

This worked perfectly and exactly as described. I also have this printer set up as a network printer. Will see if that works as well. Thank you very much!!

[@kennypartsch9594]

Great information, Thank you! The only thing I would add is connect a USB Printer cable from the back of your printer to a computer or laptop. You must use a Type A/B printer cable and plug it into the correct USB port on the printer (square) not the standard USB input port on the front.

[@robertwang654]

Hi Kenny, could you please show a link to this type usb cable?

[@christim8979]

I was successful doing this over Wi-Fi and only had to run the exe file once. I ran it from the "bad cartridges" screen and it worked perfectly. Thank you so much for sharing!

[@N7167L]

I was not able to downgrade my firmware, via WiFi, but I was able to perform the downgrade, via a direct-connect USB cable. :)

[@N7167L]

Thank you!!!!

[@outdoorsdream]

I had remanufactured Black Ink cartridge 702XL from staples and just refilled the color ink. Decided to update firmware, what a mistake that was. Scanned file with Avast premium, no issues. Thank you, it is working again. When the printer reboots, my window came up saying the printer had a firmware upgrade waiting. I pressed close on that screen and it finished rebooting and did exactly what All In One Devices said it would do.

[@stevedouglas2999]

Yep that's me a month ago commenting down below. I somehow forgot what Epson does when you update firmware official and messed up my printer, again. Glad I could find this great video once a again. And once again, it worked perfectly!

[@rickandersen8632]

Worked out great on the first try. Only problem was I didn’t use the usb port on the back of the printer the first time. I was using the one on the front. Thanks. I bought the compatible cartridges in bulk so I really wanted this to work.

[@brettbenson8313]

Thank you! Clear instructions and process. I am able to use my aftermarket ink cartridges again.

[@tinaboyle1893]

Oh My Gosh!!! Thanks sooooo much. Had my printer for 8 months and someone updated it while I was out with my baby for surgery. I have more orders now than I've EVER had and no way to fix it!!!! This worked for me. I did have to use the computer I originally set the printer up with but it worked!!! Thanks

[@lnportcpa]

This guy is my hero. This worked today (30 July 2020) on a WF-3730. (I downloaded the problem firmware this morning). Note that I had to remove the printer from my computer and replace the replacement cartridges with the empty ones that came with the printer (lucky I still had them). Also, if you have it set up as a wifi printer previously, make sure the "Network" printer (not USB) is UNCHECKED when you re-install the firmware.

[@terrydurich779]

Absolutely perfect video. Worked exactly as described. Thanks so much

[@carolinetoth6476]

Manny is a genius! It worked!! I am so happy as I stupidly hit the ok button on a software update and that made my boxes of cheap off label ink useless... until Manny saved the day!

[@andiamo7367]

Beautiful!! A true easy to follow and successful downgrade to the firmware. I had to use the 2nd link to get the download but it worked perfectly. Thanks

[@JodiAnderson78]

THANK YOU! THANK YOU! THANK YOU! I'm back in business! Instructions were great and easy to follow.

[@stevedouglas2999]

Thank you. This totally worked. I was lost for hours before I found it.

[@quaxo1172]

OMG.... thank you!!!!!!!!!!!!!! It didn't work at first, so I ran all the steps again. MAGIC!!!!! You Rock!

[@JamesRosendahl]

You are correct - the link is working. I could not get my PC to see the printer via USB when in recovery so I updated using WiFi with printer not in recovery mode and it worked perfectly. Before updating I could not use my printer due to 3rd party ink, now I just printed a page. Thank you for giving my printer back to me.

[@cheriehambleton1399]

Will this work for the WF 3820? The printer looks the same but I cannot find any info of how to do this for the 3820

[@scoose2450]

This worked perfectly fine for me in March 2021. Thank you for posting!

[@paulipip]

You're my hero....that one comment about if the ROM flash screen is any other color than white try again....I was red and didnt know I had a problem....I flashed my software...There are still other problems...but i'll figure it out.

[@luccote3309]

Many thanks for those tips. Very helpful and works like a charm :)

[@chriswong2012]

[SOLVED: Read this if you have the latest firmware!] It doesn’t work for me if I follow exactly what he did in the video. The printer remains at the latest version in the recovery mode. I eventually turn on the printer in normal mode and use the firmware he provided to update through USB cable without access to internet. After restart my printer was down upgraded eventually. I hope it helps for some of the people encountering the same issue

[@dbdemontage145]

first time it didnt work, second time i removed all cartridges and done it again, now my printer works fine, tnx!

[@McUkes]

Thank you, worked perfectly and can again use my non-Epson cartridges

[@christianglupker2174]

Bar none, the best step-by-step ever. It worked. You're awesome.

[@butchadair9752]

This actually worked for me. The only difference is when I got to the instruction on #6, I had to take the printer out of update mode so it could be recognized. I just let it install from there and it worked. In other words, I didn't put the printer in update mode. It did it itself

[@coreymatlak3989]

been struggling to fix this for over a month. thank you for this video

[@EnteiIsDoge]

Seems like the link isn't working anymore. Anyone knows where else to find the firmware update file?

[@BrentShapiro]

Thank you! I was so angry with my printer when it stopped using my generic cartridges because I hit that stupid update button. This worked great - just had to order a printer cord! THANKS

[@ritapadovan7355]

this was awesome. my download file said something like wf-3720-downgrade.exe vs chipless.exe hope this helps! i also took my ink cartridges out before i started this. it worked! I'm so happy!!! thank you buddy!!!

[@scotthahn8105]

Perfect solution. Fixed my wf-3720 problem as needed. Never buying Epsoin again now that I know they are the cause of this type of issue.

[@charitobr88]

It worked!! Just added the compatible cartridges and were recognized. Thank you!!

[@dimensions1026]

Worked like a charm. Thank you so much for uploading this!!

[@robertfault1375]

Thank you thank you thank you. I too was about to go and buy another brand. I use a brother for a laser printer and love it. Was about to get a color one but this saved me a bundle. Thank you again

[@alangreenberg3838]

Thank You! I was ready to throw it in the trash before I gave into Epson, and your step by step directions were the easiest to follow that I've run into for any problem. Do you have a patreon or something similar where I can share my gratitude?

[@kristinepost5775]

LIFE SAVER!!!! A couple tips for people like myself that are barely tech savvy. Use the printer usb cable that attaches to the back of the printer by the power cord. When putting printer into update mode- press closer to the display area vs right on the top right (almost a thumb width in). Very easy even for me and I'm barely computer literate.

[@carolinasuria9724]

This worked seamlessly! Thanks so much!

[@DonCanebrick]

Is there a new link to the video? It appears there isn't one anymore.

[@jamesruggiero757]

Thank you - Epson support is terrible stating I have faulty ink. I just down graded and restored operation.

[@josephgarcia3856]

How did you downgrade, where did you find the firmware?

[@thyrayuthsao7774]

Thank you so much. My boss was gonna kill me if he knew I broke the printer. :D

[@williamsmith4824]

thank you so much! this was so helpful and saved me so much money on printer ink.

[@rondy87]

link is broken

[@bronxbomber2004]

You sir are a Scholar and a Gentleman. I thank you!!!

[@KJW1968]

Thank you Manny!! Saved my printer and a lot of money!

[@bjornwallace1401]

the link is not working yet, i mean the folder is empty, why ?

[@Tech1000World]

Worked great! I was getting ready to run the printer over with the car, haha, until I found this video. Thanks for putting up this video it has been a GREAT help. And I didn't have to mess up my car.

[@grindinforgreatness2987]

This guy is superman. fantastic directions and great step by step video

[@ejjenkins]

I just ran this over the network (WIFI not USB) as my PC did not see the printer by USB. The firmware update did not complete (according to the updater stopped at 83%), but it did finish on the printer and it works. I assume this is due to the printer rebooting after it completed. I also did not go into the update mode. I simply did this with the printer on and at my cartridge error screen :-) . Thank you very much!!!

[@Frostypawz76]

I can confirm this can be done provided your printer is connected to wireless network nd you have the appropriate drivers installed on the pc you are downgrading. I had a laserjet mfd in my cart lol...almost down 400$ then this finished

[@sauleini8697]

The downgrade software won't recognize the USB cable. I'm stuck at step 5 (4:25 minutes in the video). Can't run the downgrade process. Any idea what could it be? I hear the windows chime when I connect the USB and I tried 3 USB ports.

[@80antdiva]

Mine is doing the same thing

[@rebeccadarter1494]

Worked like a charm. THANK YOU!!

[@hearsaym]

AWESOME THANK YOU!!! Now to disable firmware updates!!!

[@meganmatthews2022]

Any idea on a downgrade for the 3820, Firmware updated 1/10/22 and I have spent a week trying to fix it.

[@michaelkollmeyer5223]

I will admit I did do a firmware update. Result - nond of my 3rd party cartridges were recognized by my WF-3720. I attempted to follow the directions Manny provided. I was dong OK until I got to the gofile link. When I click on the link it first asks if I want to leave Utube or a second choice. System them attempts to run the link. Unfortunately, I get a message that says the file no longer exists. Is this link still valid and if it is, can someone tell me what I am doing wrong? The firmware update was done 8-25-2022.

[@johnmcguinness2847]

HI I have an Epson WorkForce Pro WF-4830 can you tell me were I can down load the required software from

[@escolajosebizerradebritto344]

Muito Obrigado! Aqui no Brasil não conseguimos realizar exatamente como estava no vídeo., não sai de 45%. Mas fizemos o seguinte: após tentativas de restaurar firmware pela bios, como apresentado no vídeo, executamos o software com a impressora conectada, através do cabo USB, e ligada com a internet, via wi-fi, no meio do processo desligamos o wi-fi e ocorreu um erro na atualização; com isso a impressora voltou ao normal e podemos continuar com o book.

[@carlee719]

This didn't work for my WF-3730. I still have the 'Cannot recognize Ink Cartridge. Try installing again' Maintenance Error message.

[@michaelormandy6651]

Please read my new post, it will work, good luck.

[@aliciagoss7360]

@@michaelormandy6651 what post

[@phil7426]

Excuse me, but I can't find the files? Could you put them back please?

[@RenelD]

Thank You so much, you are a life saver.

[@Pedro-iv2uc]

Just tried it and it worked great. Thanks.

[@juanitawinberg8033]

My epson wf3720 is stuck in maintenance error even after everything you did error still comes up. How do I fix this

[@Sashazur]

Here’s how I downgraded to older firmware on my WF7710, maybe a different method but it can’t hurt to write it down. I have a Mac but I think it would be almost the same on Windows: 1. Download older Epson firmware updater software for the WF7710. I found it on one of Epson's support sites. 2. With the WF7110 powered off, hold down the buttons 4, 7, and Job/Status at the same time while pressing the power button. This will power up the WF7710 into recovery mode. 3. Connect the WF7710 to your computer with a USB cable (if not already connected). 4. Run the Epson firmware updater software as normal (since the WF7710 is in recovery mode, the updater won’t complain about newer firmware already being installed). 5. Wait several minutes for the update to finish. When done the screen of the WF7710 should say "Completed" or "Finished" etc. (the firmware updater software said the WF7710 would power off when done but this didn't happen). 6. Unplug the WF7710 power cable, wait a few seconds, connect it again and power it on. Note that this didn't remove or change any presets etc. I already had set up on the WF7710. But I wouldn't rely on that always being the case with every update.

[@rosediamond9765]

Really work, you are a genius thank you so much!!! :)

[@mikenewton7825]

Manny can you provide instructions on doing this to the WF-4730?

[@rogercharles169]

Hey I followed your steps but the firmware didnt downgrade. My Printer is WF-4734 with firmware version CM09L4 (Rom version 30.76.CM09L4) and I was downgrading to firmware CM13I9. This procedure was done on a Windows 7 machine. !Only use this if the procedure in the video doesn't work for you! What I realized is the downgrade doesn't work with that particular recovery mode step shown in the video. This is what I did to get the firmware to downgrade: 1. Download a newer firmware version than what's currently installed on your printer. (I used newer firmware CM26LB from Epson website) 2. Remove inks from the printer before starting the firmware update. 3. Make sure printer is on connected to the PC/Laptop via USB cable 4. Start the firmware update application (steps shown in the video kzbin.info/www/bejne/p57YfYV3jLqWndU), but pause when you're at this screen kzbin.info/www/bejne/p57YfYV3jLqWndU N.B Next is the point where you have to interrupt the firmware upgrade by disconnecting the power from the printer. The disconnect should be done when the blue light on the printer starts blinking rapidly (when timed for me it happened approx 30 seconds after clicking YES to Proceed with firmware upgrade. 5. Proceed with the firmware upgrade and immediately look at the blue power light on your printer. When it starts to blink rapidly disconnect the power. Wait about 15 seconds before reconnecting the power. 6. Once power is connected the printer will start up and show a screen with 2 lines of text (Recovery Mode). (If it doesn't turn on automatically, press the power button.) Now to start the firmware downgrade. 7. Start the firmware update application (using older firmware CM13I9) Download here: driverscollection.com/_516958019495f5071e213a87d9e/Download-Epson-WorkForce-Pro-WF-4734-Firmware-Update-version-CM13I9-for-Windows-10-(32-64-bit)-8.1-64-bit-8-(32-64-bit)-7-(32-64-bit)-Vista-(32-64-bit)-XP-(32-64-bit)-free 8. Now you can follow the steps in the video kzbin.info/www/bejne/p57YfYV3jLqWndU 9. After the process is complete the printer will take about 10 minutes before it boots up. Be patient. 10. Once the printer boots up confirm the firmware version on the printer making sure it says CM13I9. 11. You have successfully downgraded your printer to use 3rd party inks. Remember to disable update notifications in the printer settings and also turn off automatic updates in the Epson Software Updater app on your PC/Mac

[@AdamGrahamrawveganchef]

One suggestion is to explain "update mode" instructions better. Finger needs to be off of and to upper right of touch area and must hold for 20 seconds, waiting for blue light to come on. I only found 1 video that demonstrated the 20 second wait. It was the only way I could get it to work.