Dead GPU (HELP) :)

[Liquideath]

I made a post about this about 2 years ago: "There was a short circuit in house electricity grid and the GPU stopped to send video signal, there seems to be one blown transistor and the YAMAHA reciever HDMI ports are fried so there is no HDMI input. The card turns on but doesn't output video signal. What should I do?" and those who responded told me that I should RMA it, but the warranty had expired a while ago. As I remember, he gpu made a popping sound and died... There is this one APW7142 chip that is fried.  I am asking for your expertise and help with this matter (on how to repair it) Thanks in advance!

[Kilrah]

Well if you can find replacement components and do the replacement / find someone skilled to do it for you you might have a chance to revive it if nothing else is broken. Otherwise it's good for the trash...

[Liquideath]

Got the APW7142 controller and changed it out, made sure that the connections are good and everything was as it should be. When I reassembled the GPU (cooler) and put it in my computer, turned it on, a weird ticking noise started to come from the right side of the PCB (right side from plugged in standpoint) and no video signal. It is unfortunate that I couldn't solve the issue and sell it, but mood is not ruined  because I just got my ASUS RTX 3090 which I somehow managed to buy for just 1600 eur

[Danish8468]

Hey man i have a gtx 780 and same apw7142 chip is blown no display and fan blowing on full speed.  can i know where u found replacement?

[TXPer]

On 1/4/2022 at 12:16 PM, Danish8468 said:

Hey man i have a gtx 780 and same apw7142 chip is blown no display and fan blowing on full speed.  can i know where u found replacement?

Hi, you have short circuit on 3.3v rail, full fan speed propably mean that other ic is also broken. 

 

I also have question to you, becouse i am fixing my GTX Titan X with burned PCIE data bus now. I fix that burn somehow, but my graphic card takes 0A from psu. So, can you mesure with multimeter does second pin on pci experss is connected to apw7142 or diode between apw and blue capacitor? 

 

I would be grateful

 

(sorry for my English)

[Danish8468]

On 1/15/2022 at 9:17 PM, TXPer said:

Hi, you have short circuit on 3.3v rail, full fan speed propably mean that other ic is also broken. 

 

I also have question to you, becouse i am fixing my GTX Titan X with burned PCIE data bus now. I fix that burn somehow, but my graphic card takes 0A from psu. So, can you mesure with multimeter does second pin on pci experss is connected to apw7142 or diode between apw and blue capacitor? 

 

I would be grateful

 

(sorry for my English)

Hey yes ive found that my power stages are going to i ordered sic780 too i have the apw7142 i havent got it repaired yet, ill be happy to help you 

how can i check? Im new to this! I have a multimeter if u can let me know which n which pins to test ill be able to tell. U can contact me on my email or facebook. Is rajadanish31@gmail.

[Danish8468]

On 1/15/2022 at 9:17 PM, TXPer said:

Hi, you have short circuit on 3.3v rail, full fan speed propably mean that other ic is also broken. 

 

I also have question to you, becouse i am fixing my GTX Titan X with burned PCIE data bus now. I fix that burn somehow, but my graphic card takes 0A from psu. So, can you mesure with multimeter does second pin on pci experss is connected to apw7142 or diode between apw and blue capacitor? 

 

I would be grateful

 

(sorry for my English)

I removed four faulty power stages but apw7142 keeps getting fried any idea?