Acer Nitro 5 charging circuit diagnose and how to disable a faulty GPU & VRAM

[kepler]

Going for a 20 min walk, Sorin uploads a 20 min video, perfect

[winlose]

this is a moment to salute the laptop from the previous video that had a separate GPU board!!!

[Timpano_Francesco_Repairs]

Hi Sorin, good job you save the laptop....is not a coplete fix, but OEM wont you can't be able to repair don't worry.... but customer can still use the laptop and this your win... bye Francesco Timpano from florence Italy and thank for the mouse curson modification, noe is a pleasure follow you🤗🤗

[stefan]

You should really get into VRAM diagnosing, reballing and replacent :D
The error that you got in the task manager doesn't mean that the GPU is dead but it can't be fully initialised and in most cases, it's just bad VRAM.
I'm pretty sure that it can be repaired if the VRAM is replaced.

[Dohcom]

Excellent work, Very educational video, Thanks!

[giulianoyula]

Thanks, learning a lot, congrats from argentina

[shai]

Hi Sorin, great work! But im not confident the VRAM is dead. I think right approach is to replace the mosfet and check.

[retrocomputinggrotto]

Its a real shame manufacturers stopped putting GPUs on a removable board. They'd much rather you purchase a whole new laptop I guess.

[soumyaranjanmoharana]

Can you try replacing the removed mosfet? Maybe the yellow triangle is due to absence of adequate power for ram?

[stellataylor]

Interesting comparison cause you cannot find a brand new unused kidney either 😅 All you can find are taken out from donor bodies. But yeah, probably finding a good kidney is easier than finding a working, good Nvidia chip 🙃

[Tribes]

How could manufacturers prevent the mosfet failure to deliver 19V to the GPU/VRAM Power rails? Using Zener Diode to ground would solve this issue?

I'm asking because I'm thinking what kind of modifications I could do after the mosfets to prevent the high voltage to be delivered straight into the GPU/VRAM chips.

[marwanFX]

At what temperature did you desolder and solder the charging IC? and the airflow speed

[sullah.]

Hi, Sorin what is youre method for remove black epoxy glue that is under the lenovo apu ?

[SamiTM]

Can you put a current sensor on these laptops so if they get shorted to protect the v-ram and gpu? Also for CPU?

[BootedTech]

4:34 - Sorin, why you not test after removing the vram dr-mos? They can be short to ground, not always to 19v, meaning the vram got grounded, not burned..

[blandon]

BQ send too much current to VRAM? Or just random death?

[Seanjones]

if you add more wattage to a laptop but you ensure the components are cooler (thermal putty replacement ect) is there any real risks(75/80c max temps) 125w max to 175. (g14 4080 vbios replacment)

[joakoc.]

If you buy an used GPU + VRAMS you are gonna expend over $350, for $500 you can buy a working motherboard tested, so there is no point on replacing the chips with the work it will take if for only $150 more you can get a full working motherboard. A few months ago I bought the motherboard for my Nitro 5 that had a dead CPU and is working perfectly again, I also upgraded from an i5 to an i7 because it was only $30 more.

[SOveMihai]

If a single ram chip is bad the gpu will not produce image but the nvidia chip is detected. Exist tests to find what memory chip is bad and you can replace it. The nvidia chip is not damaged only the memory is

[pcbugs]

hello Sorin I have never tried disabling GPU is it the same logic in all nvdia chipsets? what about amd discreet GPU?