The Fastest Way to Detect Short-Circuits on a Laptop Motherboard | Expert Laptop Repair Guide
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- Опубліковано 29 гру 2024
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Learn the fastest way to detect short-circuits on a laptop motherboard in this expert laptop repair guide! This tutorial covers efficient techniques and tools for identifying short circuits, diagnosing motherboard issues, and fixing common problems that cause laptops to fail. Whether you're a beginner or a seasoned repair technician, these step-by-step instructions will help you troubleshoot and repair laptop motherboards with confidence. Subscribe for more in-depth electronics repair tutorials, expert tips, and advanced laptop troubleshooting methods.
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My repair shop in Zimbabwe is running smoothy because of people like you. May you be blessed abundantly
I'm very happy to hear that, good luck
One of the best explanations on UA-cam. Grats!
Thanks! I'm glad you found it helpful.
Finally. The video which explains what short circuit means. Thank you brother
You're welcome, brother.
Well done master, finally someone explains the component checking procedure nicely, well done and thank you very much
Glad you liked it!
This is a very good lesson.
Thank you
Excellent explanation - best I have seen so far!
Glad it was helpful
Merci pour la video ♥
a very nice video, continue with such videos, we are with you ❤☺
I appreciate the love.
Can u do small video on how laptop schematic flow
@@gboyabraham568 Yes sir, it would be perfect if you make a video on this subject, we can reach a better level.
Very effective, thanks a lot you got a new subscriber
Welcome
You are awesome, as always
Thank you for the kind words.
To be honest, I think your Master in Electronic, thank you lot's.
Thanks for the feedback
Thank you very much Sir. I have now better understanding of laptop motherboard power circuit even without schematic and thermal camera. I also am able to know right voltage injection in different circuits to look for shorts. Greetings from the Philippines.
I'm glad you found it helpful
I really like this video you are making it easy for me to understand thank you
I appreciate the feedback.
Very useful, thank you.
You're welcome, happy to help.
Thank you so much Engineer for being such a person.
Thank you for watching, I'm glad you found it helpful.
Love your channel. Thank you
Appreciate the love.
This is very useful knowledge, thanks a lot for sharing this
So nice of you
Great job
Thanks for watching!
nice Content :D , pls go ahead.. well done
I will try my best
That's a great tip, thanks so much
Glad it was helpful
Thank you mentor, you have helped me to understand computer motherboard and how to diagnose faults. I'm grateful
Appreciate the kind words. Keep up the good work
Good job Boss
My pleasure
wow! that is a great understanding!
Glad you found it helpful!
@electronicsrepairbasics_erb I just followed you!
Some good points for novices.
I'd expand on inductors, however.
I always check both sides of an inductor, because sometimes, they can be open. Rarely, yes, but it can happen.
So if you're checking just one side and find a "short", without checking both sides of the inductor, you can't be 100% sure which circuits can be the problem (on one side or the other).
Of course, if the inductor is not opened, then the above is moot.
A good idea might be to always check inductors to confirm they are not open.
You never know that this could help uncover a 2nd issue, perhaps unrelated to the short condition.
Thanks for the insightful tip.
Thanks for sharing 👍
Thank you too
Thank you ❤
I appreciate your love for the video.
best of the best thank you
Thank you too
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
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.
@@electronicsrepairbasics_erb thanks ❤
Thank you very much
Glad it was helpful!
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.
I'm glad this video was helpful, and I will definitely consider creating a video on signals and voltages. Stay tuned.
Terima kasih kawan
شرح اكثر من رائع بالرغم من اني وجدت صعوبه في الفهم بسبب اللغة , شرح اتمنى ان تثري به قناتك العربية
أحاول التبسيط أكثر ما أستطيع..شكرا
@@electronicsrepairbasics_erb الصعوبة كانت بسبب عدم تمكنني من اللغة الانكليزية بشكل كامل , لذلك اقترحت عليك عمل محتوى مشابه في قناتك باللغة العربية
Thank you bro, i am verry happy to see this video, because the video helped me alot.
Thanks again
I have one laptop which is turning in, and up. On ,up and i need your help for that.
Glad you found it helpful. It sounds like you're having a power-related issue, and I'd be happy to assist.
Thank you so muh ++++++++++
welcome bro
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?
The real short is 000 reading
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.
Muchas gracias por el vídeo. Saludos
thank you
good .
Thanks, glad you found it helpful.
This technique can use to dslr camera board? Or is different?
Jazakhallahu khairan.
Sir l would to also tell me or provide link where I can get schematics and Openboardviewer
NICE VEDIO
Thank you
Hello, can you make an explanation on how the Ethernet circuit work
Noted
What model of tester you using.
A simple multimeter
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.
You should know first what is partial short and dead short cause its depend on the circuit that you’re doing…
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.
@@electronicsrepairbasics_erb Thank you very much sir, it was very important for me, greetings from Turkey
@@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.
Thank you very much Sir. Greeting from the Philippines I am able to have better understanding of power rail in laptop mobo now.❤❤❤
Sir have you ever encounter an HP folio that sometimes freeze at HP post screen?? Plsss
Yes, Graphic Card issue brother
@electronicsrepairbasics_erb couldn't it be bios issue because it's a laptop not desktop
very good I learned more skill
👍👍👍
Thanks
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
same
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.
Even 002 is not short circuit
how to know when th CPU not can get out with scurdriver
Using Lock Signs on CPU Socket
@electronicsrepairbasics_erb all the board today solder on board you can mack video chack short that no in CPU,thanks
❤️
Where are from.😊?
Why asking Bro?
قناتك بالعربي تنتظر التحديث و المقاطع الجديدة و نحن بانتظارك كذاك
قريبا ان شاء الله..شكرا
khoya lfatcha 3ndek mghribya hta accent dyal lmrok
You remove the high side MOS for nothing. You can see short on that side only if the MOS is shorted and another capacitor. This probability is almost 0.
Great Video. I have to say thank you first. Trying to fix my old laptop, I've encountered your inspring post. When I push the switch, the led is on but the fan stops after 1 or 2 seconds. What part should I check ? I will check my laptop as you teach in the video anyway. =)
Thank you so much. Nice info. The question I have ... is, what about the KBC o EC Ic. as well as data or clock , how we could spot a short in those areas. Have a good one.
Great question. To diagnose a short in the KBC or EC IC area, focus on checking the data and clock lines using an oscilloscope to identify irregular signals or shorts. Additionally, use a multimeter to measure resistance to ground on these lines. Look for unexpected low values that could indicate a short. I’ll consider creating content on this topic, thanks for the suggestion
Thank you sir
You're welcome.