Asus GTX1050 2GD5 graphics card startup screen is not bright repair

Graphics card model: ASUS GTX1050 2GD5 graphics card

Fault symptom: the boot screen is not bright.

Maintenance process:

An ASUS 1050 2G graphics card, the boot screen is not displayed.

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Measure VCC without Short circuit by removing the heat sink, and measure VCC by the upper motherboard.

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There is no VCC in the core, neither does 1V VCC, nor does the video memory have 1.5V Look for VCC chip information online.

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Start with this VCC, and check that the private print of VCC chip is 08=80H, and the model is RT7296FG.

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It is found that it is not turned on, and the PG is connected to the video memory VCC. Continue to check, and find that the opening passes through a 5 pin tube, and the screen printing of MOSFET is J2.

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It is found that this chip 2 pin is from the core VCC chip, 1 pin is connected with a resistor, and the other end of the resistor is connected to the third pin chip of the core VCC chip, and the third pin is EN. The model of the core VCC chip is UP9501P, and the upper motherboard tests VCC.

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Measurement of UP9501P found that 3 pin had 2V or so, but the core still didn’t have VCC, and 5v didn’t come.

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measureTriode2 pin has no VCC,MOSFET is not on, and measuring 2 pin is linked with two resistors, which are also connected to a 6 pin tube, 5 pin and 6 pin of screen printing K1.

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Transistor 2 pin should be 12V. After two resistors are connected in parallel, there is no VCC in measurement. Remove 6 pin tube, transistor 2 pin has 12V and 5V conduction, and the core VCC is out. However, it still doesn’t display. After testing VCC again, I found that there was no 1V and memory VCC. I found that one of the resistors was broken, so I went directly to VCC.

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After processing, it is uploaded to the main board, all VCC are available, the display is normal, and everything is normal after running the test software into the system.