HP EliteDesk 800 G1 - not booting - fans at 100% red light and beeps 4 times

[Autonetix]

hi guys,

the issue I'm having is my EliteDesk 800 G1 will not boot at all!

I was using it one day doing graphic work and it just turned off.. that was months ago..

since I have:

Removed graphics card

replaced power supply

replace ram

repasted the cpu

change fan and heatsync

change cmos bat

and it still will not boot...

I get the power supply fan maxing out at 100%, then 4 continuous beeps and a red blinking power light.

any help would be greatly appreciated, all the automated HP tools have been useless.

[TheOldMan · Accepted solution]

Here is the manual for that model.  On page 246. it describes the conditions you posted and what might be the cause.

http://h10032.www1.hp.com/ctg/Manual/c04331008.pdf

 Activity                                             Beeps                     Possible Cause

I cannot get the chart to copy and paste nor can I type it in and expect it to show properly, so go to the manual and have a look. Page 246.  The next column to the right lists the recommended action(s) to solve the problem.

[Autonetix]

I found the info I needed on a=page 215? (203 at bottom of page)

power failure, 4 beeps, red led, 5 iterations

ive done everything suggested in this section except from replacing the motherboard, which is no longer available.

I guess this guy is a dead PC.

Thanks for the help anyway.