Category Laptop Repair Guide

Laptop Repair Guide

Xiaomi 161201-AA notebook does not start for repair

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After checking, there is an indicator light on the inserted charger, and there is no boot response when the power-on key is pressed, but the indicator light will go out when the power-on key is pressed, which may trigger protection due to local short circuit. It is found that many capacitors are short-circuited. After removing the short-circuited capacitors, test the other capacitors to ensure that they are not short-circuited. After commissioning, 3.3V returns to normal.

ASUS X455LD notebook computer usb interface all failed repair

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First plug in the USB mouse for testing, and the visual mouse light is not on, which is due to the lack of USB+5V power supply. After the flying line, USB_P1 on the small board is connected to USB_P6;; USB_P2 to USB_P4. The test can identify the use of USB devices. Just give up the function of the camera, but don't have to change the CPU at a high price.

Haier mechanic T90-T notebook does not start for repair

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Haier's T90-T notebook doesn't start up, and it is preliminarily judged that there is power supply and it can't work normally. The actual measurement shows that SLP_S3# has no voltage. Finally, a brand-new original South Bridge chip was replaced, and ME was configured. The test of the machine entering the system was all normal.

Sudden power failure of HP TPN-Q191 notebook during normal use

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When the TPN-Q191 notebook is in normal use, it suddenly loses power. Carefully observe the fault phenomenon. After running for 3 days, the power indicator goes out. When it is turned on again, the self-test page reports CMOS error 502. According to the drawings, it can be seen that PQ1(AP0203GMT-HF) and PQ2(AON7408) are isolation tubes. Because PQ1 has a large current, no replacement is found, only PQ2 is found. After the replacement, everything is normal through plug-in test.