Asustek PRIME B250M-A restarts repair after memory power failure

Asustek PRIME B250M-A has rebooted auto power off, the resistance corrode is skewed, and a 2.2 ohm resistor is replaced, and the fault is eliminated.

Machine model: Asustek PRIME B250M-A

Fault phenomenon:auto power off auto restart

Maintenance process: get a piece of ASUS b250m-a, do not insert the memory, the small horn alarm does not auto power off, plug-in display does not start the auto power off normally, insert the memory self-test, start the auto power off restart.

Vccgt is abnormal, P is found_GT_VCC1_R_20 only 0.3-0.4v and unstable, check the previous P_GT_DRIVER_VCC_20 11.6 V normal.Then, measure the resistance terminal P_GT_VCC1_R_20 or 0.4V or so, repeatedly poked several times, the resistance was skewed, and resistance solder joint corrode was replaced with a 2.2 ohm resistor, P_GT_VCC1_R_20 normal, 11V more normal, no auto power off.

Asustek PRIME B250M-A restarts repair after memory power failure Figure 1.