ASUS X441UV notebook can be turned on and repaired occasionally

Machine model: ASUS A441U

Version X441UV 2.1

Malfunction: The notebook can be turned on occasionally.

Maintenance process: boot switch to 0.2.

ASUS X441UV notebook can be turned on occasionally for maintenance figure 1.

Testing the whole board VCC found that only the CPU VCC didn’t come out, and the BIOS failure was still the same. Find the CPU management chip.

ASUS X441UV notebook can be turned on occasionally for maintenance. figure 2.

I found that VCC is turned on normally. Think about it. In this case, there may still be conditions that are not met or conditions that are met are not issued. Find PWROK and SYS_PWROK.

ASUS X441UV notebook can be turned on occasionally for maintenance figure 3.

In EC’s 103 and 104 pin, there are 3.3V,PWROK is normal, and the 24 Crystal found at the back of the bridge also vibrates, and the pin waveform of bios is normal. Step by step, I finally found that the CPU didn’t send out SVID, either CPU Inveracious Soldering, or there is something wrong with the CPU, or there are other problems that haven’t been found.

Try Repeat welding first. After Repeat welding is finished, it can be tested and turned on. It can also be tested after half an hour. It can be turned on the next day after a night. The maintenance is over here.

Summary: It will take a while for CPU Inveracious Soldering to start and shut down.