I am trying to save RX 5700 XT Sapphire Nitro. Computer was normally shut down in the evening and next day graphics card was not responding - no post.
I have done some troubleshooting but I've come to dead end.
What do we know so far:
- LEDs light up and cycle trough colours as normal
- fans light up but don't spin
- all fuses are OK
- no shorts
- no visual damage to PCB or components
- GPU is not heating up
- 12V (from 3 connectors) - present
- 5V (from 2 regulators) - present
- 3,3V (from PCIe connector) - present
- No 1,8V
- No 0,75V
- No 0,9V (Vcore and/or Vmem)
Now since there is no 1,8V of course there won't be anything going on until that is present. This is where I've hit the dead end. I can not identify any of voltage regulators and since I can not do that, I can not get pinouts. If I don't have pinout then I can not see what is going on with regulator etc.
Hopefully someone here will be able to help me. Either with identifying regulators and therefore pinouts or maybe just with other advises.
I have prepared some graphics for front and back of PCB so one could easily understand current situation.
Red arrows - 12V is present at these points
Green arrows - 5V is present at these points
Orange arrows - 3,3V is present at these points
Blue arrows - 0V is present at these points
Yellow squares with numbers - unknown voltage regulators that I need help with
On marked "unknown" voltage regulators these writings are present:
1.) 7162 0NVZ
2.) FFK 153
3.) FFK 153
4.) Nuvoton NUC028LAN - probably only used for LED and fan control
5.) AREK 930
If someone could help me with identifying these it would help me a lot.
Also I have no idea which one of these produces what voltage, so that would also help.
Any help will be greatly appreciated.
I have done some troubleshooting but I've come to dead end.
What do we know so far:
- LEDs light up and cycle trough colours as normal
- fans light up but don't spin
- all fuses are OK
- no shorts
- no visual damage to PCB or components
- GPU is not heating up
- 12V (from 3 connectors) - present
- 5V (from 2 regulators) - present
- 3,3V (from PCIe connector) - present
- No 1,8V
- No 0,75V
- No 0,9V (Vcore and/or Vmem)
Now since there is no 1,8V of course there won't be anything going on until that is present. This is where I've hit the dead end. I can not identify any of voltage regulators and since I can not do that, I can not get pinouts. If I don't have pinout then I can not see what is going on with regulator etc.
Hopefully someone here will be able to help me. Either with identifying regulators and therefore pinouts or maybe just with other advises.
I have prepared some graphics for front and back of PCB so one could easily understand current situation.
Red arrows - 12V is present at these points
Green arrows - 5V is present at these points
Orange arrows - 3,3V is present at these points
Blue arrows - 0V is present at these points
Yellow squares with numbers - unknown voltage regulators that I need help with
On marked "unknown" voltage regulators these writings are present:
1.) 7162 0NVZ
2.) FFK 153
3.) FFK 153
4.) Nuvoton NUC028LAN - probably only used for LED and fan control
5.) AREK 930
If someone could help me with identifying these it would help me a lot.
Also I have no idea which one of these produces what voltage, so that would also help.
Any help will be greatly appreciated.
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