Acer 4736ZG notebook does not start repair.

Machine model: Acer 4736ZG

Fault symptom: the notebook does not turn on.

Maintenance process: the upper adjustable power supply is turned on to 0.259A and does not move. Usually, I see too much current. When I see this general feeling, it should be that there is no problem with each power supply, and the CPU power supply is started.
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Acer 4736ZG notebook maintenance without starting Figure 1

I found a CPU test directly. The original machine is T4400, and I have a T5750. The test can be turned on, but it will be powered off, and the current runs 2.8A. There used to be an ASUS machine, which was originally the CPU of B810D, but it was the same when it was replaced by the second-generation I5. The current ran very high, and then it would lose power. There was only one power supply for the CPU, so everything was stable when it was replaced by the CPU.

I thought that the CPU of the machine should be broken, and it should be ok to set the original CPU back! But the reality is that the problem remains the same after the CPU is fixed. After consulting the seller to make sure that it has been tested and delivered, I am entangled. I inadvertently bowed my head and saw something.