ASUS h81m-e mainboard switch second auto power off repair

Motherboard model: ASUS h81m-e REV 1.03
Fault phenomenon: main board switch second auto power off

Maintenance process:

A ASUS h81m-e motherboard, the fault is the motherboard switch second auto power off, will not automatically twice switch, and then manually switch will still drop.

ASUS h81m-e mainboard switch second auto power off repair Figure 1.

Disconnect IO 5538d o_0 ohm pin on pwrok will not be auto power off, which is convenient to check the fault point in the next step.

ASUS h81m-e mainboard switch second auto power off repair Figure 2.

SMD REWORK STATION heating up, check each VCC, found that the CPU has no core VCC.

ASUS h81m-e mainboard switch second auto power off repair Figure 3.

ASUS h81m-e mainboard switch second auto power off repair Figure 4.
There is no VCC in asp1258 en.

ASUS h81m-e mainboard switch second auto power off repair Figure 5.

Again, it was pulled down by pq735.Continue pq735 is controlled by pq730.

Control VCC OK, but it doesn’t pull down.Continue to trace pq730 to control the source of VCC.

ASUS h81m-e mainboard switch second auto power off repair Figure 6.

It was found that the 30K resistor had deteriorated, and a 10k resistor was installed.

ASUS h81m-e mainboard switch second auto power off repair Figure 7.
EN has, core VCC has, power on test machine, boot normal, troubleshooting, maintenance is over.