Lenovo Xinchao 7000 notebook suddenly shuts down and does not start up for maintenance during use

Lenovo Xinchao 7000 notebook suddenly shuts down and does not start up for maintenance during use.

Lenovo Xinchao 7000 notebook suddenly shuts down and doesn’t start when it is in use. Firstly, it suspects the BIOS program problem, and the fault remains after brushing; After eliminating the sleep switch problem on the small board, remove the magnetic induction sleep chip and solve the problem!

[Machine model] Lenovo Xiaoxinchao 7000

[Fault phenomenon] No trigger, no standby at irregular time.

[maintenance process]

Upon receipt of Lenovo Xiaoxinchao 7000 failure machine, the customer described that the notebook suddenly shut down and stopped booting in use.

After getting the machine, test and unplug the battery. After the COME battery is plugged in, it turns on normally. After all the batteries are plugged in, it turns off occasionally and then it can’t be triggered. When it can be turned on, the system functions normally.

Lenovo Xinchao 7000 notebook suddenly shuts down when in use, but does not start up for maintenance Figure 1

First of all, I suspect the BIOS program problem, and the fault remains after brushing. After plugging and unplugging the power supply continuously, it is found that the charging light is not lit without triggering. If the charging light is lit, it can definitely trigger the startup. Repeated tests have found that unplugging the COMS battery panel can be triggered every time. This machine has COMS battery as an independent panel on the side.

Lenovo Xinchao 7000 notebook suddenly shuts down and does not start up when in use. Maintenance Figure 2

Lenovo Xinchao 7000 notebook suddenly shuts down when in use, but does not start up for maintenance Figure 3

After eliminating the sleep switch problem on the small board, remove the magnetic induction sleep chip and solve the problem!