Lenovo Legion DY500 - Short on "NVVDD", could it be the GPU chip?

[Umadbro]

Hi. I've received this laptop which was left on during the night with a compatible charger plugged in. The next day the fusebox was down and the equipment was dead. Previous attempts of repair were made.

I identified the short on "VIN", removing "PQ202" and applying a low voltage on the shorted side made the GPU chip warm up.

Removing "PQ5803" and "PQ5804" made me understand the issue was on the GPU side.

After lifting one side of "PL5801", "PL5802" and "PL5803", I isolated the issue as being on NVVDD. As no power was being supplied to the dedicated GPU, I thought maybe the laptop would turn on, and it did.

I moved some components out of their place to find a culprit. My idea was that possibly the issue would be the Core Power IC, in this case, "PU5801", but removing it didn't make a difference, and "PC5837" is not even present. Apart from that, I still have to move "PR5823" out of the way, but it seems unlikely that this is the issue.


Now I'm left with this issue where I can't understand if the problem comes from the GPU chip itself, and I would like some help proceeding from here.

[Dreigas]

Re: Lenovo Legion DY500 - Short on "NVVDD", could it be the GPU chip?

Hi. I've received this laptop which was left on during the night with a compatible charger plugged in. The next day the fusebox was down and the equipment was dead. Previous attempts of repair were made.

I identified the short on "VIN", removing "PQ202" and applying a low voltage on the shorted side made the GPU chip warm up.

Removing "PQ5803" and "PQ5804" made me understand the issue was on the GPU side.

After lifting one side of "PL5801", "PL5802" and "PL5803", I isolated the issue as being on NVVDD. As no power was being supplied to the dedicated GPU, I thought maybe the laptop would turn on, and it did.

I moved some components out of their place to find a culprit. My idea was that possibly the issue would be the Core Power IC, in this case, "PU5801", but removing it didn't make a difference, and "PC5837" is not even present. Apart from that, I still have to move "PR5823" out of the way, but it seems unlikely that this is the issue.


Now I'm left with this issue where I can't understand if the problem comes from the GPU chip itself, and I would like some help proceeding from here.

Hi man, did your found a solution? I have exactly the same problem...

[ktmmotocross]

Re: Lenovo Legion DY500 - Short on "NVVDD", could it be the GPU chip?

Hi. I've received this laptop which was left on during the night with a compatible charger plugged in. The next day the fusebox was down and the equipment was dead. Previous attempts of repair were made.

I identified the short on "VIN", removing "PQ202" and applying a low voltage on the shorted side made the GPU chip warm up.

Removing "PQ5803" and "PQ5804" made me understand the issue was on the GPU side.

After lifting one side of "PL5801", "PL5802" and "PL5803", I isolated the issue as being on NVVDD. As no power was being supplied to the dedicated GPU, I thought maybe the laptop would turn on, and it did.

I moved some components out of their place to find a culprit. My idea was that possibly the issue would be the Core Power IC, in this case, "PU5801", but removing it didn't make a difference, and "PC5837" is not even present. Apart from that, I still have to move "PR5823" out of the way, but it seems unlikely that this is the issue.


Now I'm left with this issue where I can't understand if the problem comes from the GPU chip itself, and I would like some help proceeding from here.

newer gpus have low resistance so it is hard to say if it is shorted. mostly one of three or more phases can be off for to gpu work. if not, gpu is mostly shorted. remove power and work on integrated