Gigabyte gv-n105td5-4gd the graphics card has no power supply repair

Gigabyte gv-n105td5-4gd the graphics card has no power supply repair.

Gigabyte gv-n105td5-4gd display card does not have VCC. It connects corner 1 and corner 4 together directly. The test can work normally and the repair is completed.

Machine model: Gigabyte gv-n105td5-4gd.

Fault phenomenon: the graphics card can be used normally.Mdbz to test the next day, test card 2B.

Maintenance process: Test VCC 12V5V.3.3V.1.8V.The core 0.8V was normal, but VCC, pexvdd and VCC were not detected.

Gigabyte gv-n105td5-4gd the graphics card has no power supply repair Figure 1.

Gigabyte gv-n105td5-4gd the graphics card has no power supply repair Figure 2.

After searching for a long time without any drawings, it seems that it can only be repaired blindly.I haven’t repaired a few video cards, but I found some information on the Internet. After the series 1.8V and the core VCC come out, PG signals will be sent out, and pexvdd VCC will come out.The results show that the chip up1728 and 3.3V VCC of pexvdd are normal, and there is no en VCC.PG signals of 1.8V and core VCC are also out.

There is no way but multimeter to measure, two PG signals are to a pentagonal IC above.Screen printing CE found chip model sn74lv1t08dckr on a certain treasure.Angle 1 and angle 2 are high potential, and the fourth angle will output high potential. I also measured that angle 4 is just connected to the en angle of up1728.I don’t have this IC on hand.

Gigabyte gv-n105td5-4gd the graphics card has no power supply repair Figure 3.