IBM x3550 M2 was powered on in less than 10 seconds, and auto power off was repaired

Machine model: IBM x3550 M2
Fault phenomenon: start less than 10 seconds on auto power off, the indicator light shows BRD
Maintenance process:
An IBM rack server x3550 m2, the test boot does not show, less than 10 seconds auto power off,auto power off fault indicator light for a moment, BRD, repair IBM server know that BRD is generally motherboard fault, but also do not eliminate the memory and interface board caused by the problem.

IBM x3550 M2 was powered on in less than 10 seconds, and auto power off was repaired Figure 1.

IBM x3550 M2 was powered on in less than 10 seconds, and auto power off was repaired Figure 2.

There is a lot of dust in it. First clear the dust and turn on the power. It actually shows.However,auto power off does not appear in five seconds. If you turn on auto power off, you can remove the SAS card, disconnect Nand,VCC, and then unplug the optical drive FPC. One redundant power supply is used first, and only one memory is used, including CPU. When it is found that auto power off is turned on for ten seconds, the fault indicator displays BRD,You can basically eliminate the problems caused by other accessories, mainly caused by the motherboard. First use IBM’s IMM to see what caused the failure.

IBM x3550 M2 was powered on in less than 10 seconds, and auto power off was repaired Figure 3.

From the log of the network board, there is no fault.

IBM x3550 M2 was powered on in less than 10 seconds, and auto power off was repaired Figure 4.

After careful inspection, a slight trace of corrode was found near the fan port. Two resistors of the eighth pin of max1917 and an Capacitor on the side had corrode. When the two resistors were removed, it was found that one resistor PAD was missing, and the size could not be known. After checking the data, it was found that the memory was VCC chip, which was dual CPU, and there should be a channel of memory VCC,Find the same max1917 on the other side of the motherboard. Refer to the eight pin resistor. It turns out to be a 21k and 10K resistor. Replace the resistance of corrode here with the same one.