CPU-LED NO BOOT || MSI A520M-PRO REPAIR MOTHERBOARD FIX

My Tools:
DDR3 and DDR4 Post code tester (white ddr card): s.click.aliexpress.com/e/_DlPkjHZ *
Tweezers: de.aliexpress.com/item/4001204950066.html?gatewayAdapt=glo2deu
Soldering Station AIXUN T3A T245 B Set: de.aliexpress.com/item/1005004723305179.html
JBC tips that i use: C245-906 (bought of a german retailer) , C245-030 (bought of a german retailer) , C245-908 amzn.to/47eHP05 * , C245-752 amzn.to/47BqxtO *
PCIE Post Card: s.click.aliexpress.com/e/_DFG6bDh *
Side Cutters: de.aliexpress.com/item/33000843365.html
DDR3 DDR4 Data line Tester: s.click.aliexpress.com/e/_DeXhGBh *
Pre heater: s.click.aliexpress.com/e/_DdLOAEr *
Reball jig: s.click.aliexpress.com/e/_DDBfd1p *
needle probes: s.click.aliexpress.com/e/_DDVwI0T *
CH341A Bios chip programmer: s.click.aliexpress.com/e/_DDSzBoN *
Soder Wick: s.click.aliexpress.com/e/_DB4acRv *
Microscope: s.click.aliexpress.com/e/_DBwIwZ5 *
Microscope Ringlight: s.click.aliexpress.com/e/_DdRyA7Z *
Microscope Arm (used 3D printing to make it work, can provide an STL if needed): amzn.to/3R1hn48 *
Power supply: s.click.aliexpress.com/e/_DlMyhcP *
12V to 24pin ATX adapter: s.click.aliexpress.com/e/_DF6k0VV *
Components Tester: s.click.aliexpress.com/e/_Dl1MC71 *
Hot Air: Some Quick 861DW counterfeit
The Flux i use sucks, so dont buy it lol
The Copper wire i use is 0.1mm Enameld wire, link is dead, but the wire wasnt great anyways
Oscilloscope RIGOL DS1054Z amzn.to/3R2aDmE *
Thermal Camera Seek Compact amzn.to/47hGeX6 * (I would check out the infiray P2 Thermal cameras to be honest if i wouldnt have already bought this one!)
Multimeter (cheap one for beginners, that i still use): UEZNIRN IEC61010-1 multimeter
UV light: amzn.to/40L0fD1 *
mainboard_medic
Links marked with * are affiliated links and i get a small comission from them without you paying extra. (The * is not part of the link)
For any business inquiry :
[e-mail]

[@bahadoromid3554]

The failure of the BIOS chip and the stuck CPU LED was very interesting.(Thank you)

[@peterwhitear7716]

great work love watching your repair vid's

[@semihk7626]

Nice man türkiyeden selamlar

[@Jason-zh7wo]

Nice job

[@Negiku]

Great job. I have always been flashing 1.8v bios chips with CH341A which is 3.3v. Never had any issues with it.

[@LeadFarmer813]

its not super risky just sometimes never verifies due to bad write small area similar to what he had but could be chip or center pad grounding a pin on wrong adapter not wson8 qfn8

[@SianaGearz]

CH341a data pins are current limited to something ridiculously low, i forget, something like 2mA, so the inherent pin drive resistance and the protection diodes end up eating the voltage difference. If you don't have a CPU connected that should be OK but it's not quite proper and i'm not sure i'm considering all the corner cases. Most CH341A boards are made supplying CH from 5V instead of 3V3 and it still works not killing every single 3V3 chip either. Ch341 is very very slow though so one wouldn't be using that given a choice, and other programmers have a different voltage-current behaviour.

[@MainboardMedic]

@@SianaGearz Ive heard about that multiple times and people have told me that they where succesful! But i want to be sure, i had it before, where i had a bad flash with a 3.3V programming on a 1.8V chip!

[@dorinxtg]

Thanks for a great video Your camera has some focus breathing issues. Something changed lately?

[@MainboardMedic]

Ive noticed, nothing really changend, i need to figure out why there camera wants to refocuss so often, thank for mentioning!

[@15dejo]

Nice video, I realy enjoy, can I ask you which one adapter you using for flashing bios?

[@MainboardMedic]

The adapters, that i use are either from the CH341A or are self made!

[@pedroveloso9707]

14:58 to check eeprom data fixation, bad byts, for exemple.. in your eeprom writer fill all 00 and write and verify.. they all must be what you write 00. do the same but now using FF. some times have a error that is the same as the file i need to write, so the verification givew me ok, but that 0x00xx was bad. and you will not find.

[@MainboardMedic]

I should defenetly try that first next time before tossing the chip! Tahnk you!

[@benjaminwirth5192]

Recently i got the Asrock A520 Phantom 4 for 21,99 include sending in working condition. Is it worth repairing the lower end boards?

[@MainboardMedic]

Lower end boards are most of the time not worth repairing money wise! For experience and knowledge they are great or sometimes for content, but money wise they are not!

[@Astravall]

I'm a bit uncomfortable with that hot air near these plastic connectors around the BIOS chip without any protection. Especially after i saw the melted connector on your programmer adapter. I suggest at least use some kapton tape to protect these connectors

[@MainboardMedic]

I got to be honest, sometimes my work is a bit quick and dirty and i really could do with some kapton!

[@markjamesromeroo8217]

try rt809f programmer is fast and cheap can program startup chip please

[@MainboardMedic]

I will upgrade to a Revelprog soon!

[@LeadFarmer813]

you got lucky w the QFN8 wson8 6x8mm chip.. the adapter pins sometimes touch center ground pad under chip and wont detect so try kapton tape under center ground... or get the yellow adapter for them cheap. also try asprogrammer but ch341a is not a pros tool.. try T48 or RT809F or even cheap xp866+

[@MainboardMedic]

I will upgrade to a Revelprog soon!

[@wolf1438]

A lot of repairs are around AMD chipset. Is it on purpose or AMD motherboards are more prone to fail?

[@shadowopsairman1583]

No issues with an AsRock B550 Steel Legend with a Ryzen7 5800 in it, GA and MSI are meh, Asus is the same too now, just poor manufacturer quality from the pcb makers.

[@MainboardMedic]

Actually the chipsets or the PCH´s in my experience fail way more often on Intel Boards! Ive never had a B450 Chipset fail on me and ive worked on a lot of these, but for example X99 or Z270 Chipsets are dying left and right!

[@wolf1438]

@@MainboardMedic my assumption was based on your last 10 video uploads. 8 AMD chipsets and 2 Intel chipsets.

[@MainboardMedic]

@@wolf1438 Oh you mean in general intel or AMD boards, i just tend to not buy the intel ones haha, they have way to many times a dead Chipset, so there is a lot more dead intel boards, but i just dont work on them!