Help Agilent E4406A Pulling down the power supply not starting

[jessejgm]

I have one E4406A with the same problem. I didn't disassemble it. I saw comments that could be the power source. Do I check the power source directly?
It has the same characteristic sound. And it does the same as the video in these links. Strange that before it was working perfectly.

https://groups.io/g/HP-Agilent-Keysight-equipment/message/137005
https://groups.io/g/HP-Agilent-Keysight-equipment/message/131835

I will tell you the tests I did.
I turned off all the accessories.
I did a good cleaning.
I only left the motherboard with the fan controller.
I replaced all the 100k 1206 and 150k 1206 resistors. Same problem. I measured the old resistors and checked that they were good, and put them back in.
The source LED turns on (green), but I hear a noise when it pulses.
The red LEDs on the fan control board sometimes light up (red) and sometimes not.
Same problem continues.


Hi
I'm doing as it says in the manual.
I don't have the tensions. And every time there is a pulse it resets the voltages. Both + and -.
The processor LEDs always blink.

[m k]

Short whining sound with pulsing power LED is many times an overloaded power supply.