ZOTAC gtx1080-8g d5x graphics card open game white screen repair

ZOTAC gtx1080-8g d5x graphics card open game white screen repair

Graphics card model: ZOTAC gtx1080-8g d5x player power supreme graphics card

Fault phenomenon: open the game white screen

Maintenance process:

A sotai gtx1080-8g d5x player power supreme edition graphics card, the fault is that the cold machine boot into the game white screen, open several times to normal.

ZOTAC gtx1080-8g d5x graphics card open game white screen repair Figure 1
This problem is that a certain component of the graphics card needs high temperature to be normal, and VCC has more problems.First, check whether all VCC waveforms of the core VCC are normal, secondly, the Capacitor is bad, and there is the reason of the video memory core itself.

Test all VCC except PEX_VddC VCC is normal, 1V or so, but VCC is 1.05v when the display card is normal, 1.45v is significantly higher when it is abnormal, and there is no waveform at 1.46v.

This situation can only be attributed to the problem of U7 PEX VCC chip itself. The chip 5V VCC is directly connected to VCC to output pin.

Replace the chip directly. The chip is up1727q, only up1728q is on hand.

Compared with the chip data, except for up1727 8,pin is NC null.

pin a 10k resistor to 5V.

That is, the frequency of 1728 is 200m high. If 1728q is used to replace it directly, the waveform of VCC is normal.

Run DAG directly without any problems, the problem is solved perfectly!