Hp z420 power cycling, then 4 beeps when PSU plug removed

[imadam123]

I have an old hp z420 workstation. When I power it on, it just power cycles. When I disconnect the power cable there is 4 long beeps and a red light at the power button. I've tried all the troubleshooting steps and none have worked
The 4 red beeps should be an indication of a bad PSU, but I've already tried a new one and there's no difference

[mon2]

Remove all power. Measure the RESISTANCE (not diode mode) of each inductor (2 legged and usually grey in color) on the board. You are checking for a low resistance which may be due to a shorted capacitor onboard which will trigger the local power supply to shut off.

PS: I think I have one of the same units from when we did a design for HP.

[imadam123]

Forgot about this thread, only rediscovered it when i was trying to fix this after a while. Measured them all and they all read ~0.250

[imadam123]

left it off overnight, all measure 0.015 at the 2k mode on my multimeter

[imadam123]

bump

[imadam123]

Bump

[hoaca388]

Bump

"Bump" what ? You must upload the original bios file (even if it is corrupted) and serial number.

[imadam123]

It's not a bios issue unless I'm not understanding you, and I don't have a 16 pin clip to get it