Troubleshooting of Lenovo rescuer y9000x 2020 notebook no booting

The test found that the startup was slow, and it took 20 seconds to show it. This is usually caused by ME mismatch after changing the south bridge. Brush BIOS first, buy pure ME BIOS, but the programmer does not support QH128AHIG, and replace it with 25L12873F. The boot test sound is normal. Perfect repair of faults.

Machine model: Lenovo y9000x 2020
061p board

Fault phenomenon: laptop no booting, press the start button, no response, discharge invalid.
Maintenance process:
Measuring diode value found 3.3V standby,Inductor 19 to ground, 1.05v to ground was 0, others were normal.When connected to 1.05v Inductor,Current heating test has only 200 ma current, and Short circuit point cannot be touched.
There is no drawing. According to experience, the two groups of VCC arrive at the South Bridge at the same time.South Bridge sr40b black glue, removed only a few empty points.Then measure each Inductor to the ground, weld the New South Bridge, and then measure the ground value to be normal, and install the test.

The test found that the boot is slow, it takes 20 seconds to display. This is generally caused by me mismatch after replacing Nanqiao.Intel smart voice plays exclamation point, no sound output, and the same is true for the re installed system.Plug in the power prompt slow charger, mine is 65W, maybe the power does not match, the customer has changed the case, do not know how much the original power.After inquiry is 95w, can only wait for the customer to bring the original power supply to test.
First swipe BIOS, buy pure me BIOS, but programmer does not support qh128ahig, replace 25l12873f successfully.Boot test sound is normal.The fault is repaired perfectly.

Troubleshooting Figure 1 of Lenovo rescuer y9000x 2020 notebook no booting