The Fastest Way to Detect Short-Circuits on a Laptop Motherboard | Expert Laptop Repair Guide

[@alexgreis]

One of the best explanations on KZbin. Grats!

[@electronicsrepairbasics_erb]

Thanks! I'm glad you found it helpful.

[@beavengwandira9790]

My repair shop in Zimbabwe is running smoothy because of people like you. May you be blessed abundantly

[@electronicsrepairbasics_erb]

I'm very happy to hear that, good luck

[@abbeyzondo]

Finally. The video which explains what short circuit means. Thank you brother

[@electronicsrepairbasics_erb]

You're welcome, brother.

[@DevilbyMoonlight]

Excellent explanation - best I have seen so far!

[@electronicsrepairbasics_erb]

Glad it was helpful

[@mrBDeye]

This is a very good lesson.

[@electronicsrepairbasics_erb]

Thank you

[@miloradputic6419]

Well done master, finally someone explains the component checking procedure nicely, well done and thank you very much

[@electronicsrepairbasics_erb]

Glad you liked it!

[@abdulaleemsyed8003]

Jazzakh Allahu khayran, BarakAllahu feekh. Brother please make a video on signals and voltages , as I am new to chip level I'm very much confused.

[@electronicsrepairbasics_erb]

I'm glad this video was helpful, and I will definitely consider creating a video on signals and voltages. Stay tuned.

[@n_0_body]

Love your channel. Thank you

[@electronicsrepairbasics_erb]

Appreciate the love.

[@kenghaggai9986]

Thank you mentor, you have helped me to understand computer motherboard and how to diagnose faults. I'm grateful

[@electronicsrepairbasics_erb]

Appreciate the kind words. Keep up the good work

[@mrta.]

a very nice video, continue with such videos, we are with you ❤☺

[@electronicsrepairbasics_erb]

I appreciate the love.

[@gboyabraham568]

Can u do small video on how laptop schematic flow

[@mrta.]

@@gboyabraham568 Yes sir, it would be perfect if you make a video on this subject, we can reach a better level.

[@markmaharaj8861]

I really like this video you are making it easy for me to understand thank you

[@electronicsrepairbasics_erb]

I appreciate the feedback.

[@TheIronHeadRat]

Thanks for sharing 👍

[@electronicsrepairbasics_erb]

Thank you too

[@unebonnevie]

You remind me of a professor from Europe that I had in college. He really cared for the students and know the students by names! Most American professors didn't give a sh*t, and they still behave that way in the USA's higher education.

[@RaminNobavar]

That's a great tip, thanks so much

[@electronicsrepairbasics_erb]

Glad it was helpful

[@luisb.458]

Muchas gracias por el vídeo. Saludos

[@electronicsrepairbasics_erb]

thank you

[@armanitservice421]

This is very useful knowledge, thanks a lot for sharing this

[@electronicsrepairbasics_erb]

So nice of you

[@terita101]

your videos are inspiring and informative. I have a couple of questions. 1- can we check the Mosfet on the board without removing it? In this video instead removing the high side Mosfet just check if the Mosfet has sign of a short Mosfet without removing it, if no then we can say the other side of the Mosfet is not shorted. 2- Without Schematic how we can say a Mosfet is high side or low side, as sometimes traces on the motherboard is not clear. thanks

[@electronicsrepairbasics_erb]

1. Yes, you can test a MOSFET on the board without removing it in many cases, but it's crucial to interpret the readings accurately. Using a multimeter in diode mode, you can check for short circuits across the MOSFET's drain, source, and gate terminals. If there’s no indication of a short circuit, it’s a good sign. However, remember that in-circuit testing may sometimes be affected by surrounding components. In the example you mentioned, checking for signs of a short circuit on the high-side MOSFET can help you infer the condition of the low-side MOSFET. 2. Without a schematic, you can identify a high-side or low-side MOSFET by analyzing the circuit's layout and connections. A high-side MOSFET typically connects the power supply to the load, while a low-side MOSFET connects the load to ground. Look for the traces leading to the source and drain terminals. If the source is connected to the power rail and the drain to the load, it’s a high-side MOSFET. If the source is grounded and the drain connects to the load, it’s a low-side MOSFET. While unclear traces can make this challenging, observing the component arrangement and testing continuity with a multimeter can provide clues.

[@terita101]

@@electronicsrepairbasics_erb thanks ❤

[@dalwindersingh9455]

Thank you very much

[@electronicsrepairbasics_erb]

Glad it was helpful!

[@mahmoudmanbari2498]

best of the best thank you

[@electronicsrepairbasics_erb]

Thank you too

[@nessim.liamani]

Thanks. May i ask you : 1. where do you find those technical documentation about whole motherboards? 2. what if we cannot remove a CPU which is soldered? How in that case to troubleshoot for shorts for the area of the CPU?

[@electronicsrepairbasics_erb]

The real short is 000 reading

[@nessim.liamani]

ChatGPT : Ah, I see the confusion! In the context of the video, the trainer likely explained that: 1. **Inductors around the CPU area**: These are often part of the power delivery network (like VRM - Voltage Regulation Module) that supplies the CPU. When testing inductors in this area, a short (near-zero resistance) reading is **normal** because the inductors are directly connected to the power supply lines and the CPU. The CPU itself has very low resistance due to its internal architecture, which makes it appear as a short on a multimeter. 2. **Why the "real short is 000" matters**: The reply from the expert suggests distinguishing between a **normal low resistance reading** (like the CPU power rails) and an **actual short circuit**. An actual short would often show 0 ohms or a near-zero reading (e.g., 000 on a digital multimeter). The trainer in the video might have cautioned that such low resistance on inductors doesn't necessarily indicate a fault-it’s just a characteristic of the circuit. ### How to troubleshoot in this case: When dealing with low resistance readings around the CPU: - **Use a known-good reference**: Compare resistance readings with a working motherboard to confirm what's normal for that specific circuit. - **Isolate the fault**: Check for shorts elsewhere (e.g., on capacitors, MOSFETs, or other components in the same power line). - **Use voltage injection or thermal imaging**: If a short is confirmed, injecting a low voltage into the shorted line and observing for heat generation can help pinpoint the problematic component. In short, the trainer's point in the video is to educate that finding a "short" (low resistance) near the CPU doesn’t necessarily indicate a fault, whereas the commenter is emphasizing that a "real short" is typically very close to 0 ohms. Both statements are valid but contextually different.

[@balik.electroservice]

Terima kasih kawan

[@teamhombres5119]

What model of tester you using.

[@electronicsrepairbasics_erb]

A simple multimeter

[@mrta.]

Sir, I want to ask a question. How much should the omage be in coil measurements other than the CPU? For example, what should be the omage of a coil connected to ground that has fallen into a short circuit? As technicians, we are having trouble with this issue. If you answer this question, I can go a long way in repairing and finding a short circuit. I would be happy if you answer and I am waiting for your answer.

[@k3ggaming926]

You should know first what is partial short and dead short cause its depend on the circuit that you’re doing…

[@electronicsrepairbasics_erb]

This is an excellent point that many technicians encounter during diagnostics. Let me explain: If a coil is in a short circuit condition, the resistance will drop to nearly 0 ohms because the power rail is directly shorted to ground. In such cases, you’ll need to isolate and test the components around the coil, like MOSFETs and capacitors, to locate the exact fault. Shorts can sometimes be tricky, but by consistently measuring and comparing, you'll develop a sense for what’s normal in different circuits.

[@mrta.]

@@electronicsrepairbasics_erb Thank you very much sir, it was very important for me, greetings from Turkey

[@mrta.]

@@k3ggaming926 I know that much too. My concern was to learn the details because this is a serious procedure and no one explains it fully. You cannot get anywhere with general conversations. Our teacher explained the procedure, no need for extra comments, thank you.

[@laotu3776]

very good I learned more skill

[@ddembejp]

What if I can't remove the CPU because it is soldered to the board how do I know there is no short in that region

[@samg5183]

same

[@electronicsrepairbasics_erb]

No problem, in all modern motherboards the CPU is solderd .So the real short-circuit for the processor is when you get "000" not "012" either "004" reading.

[@Giorgi-1881]

👍👍👍

[@electronicsrepairbasics_erb]

Thanks

[@gothandaramanimraman4131]

Thank you sir

[@electronicsrepairbasics_erb]

You're welcome.