Question PC wont POST, fans not spinning, nothing turning on. 4 red blinking lights. i swapped a hp prodesk 600 g1 sff motherboard for a hp elitedesk 800 g1

Jan 4, 2022
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I have an HP Elitedesk 800 g1 motherboard desktop computer, with 12gb of ram. I already replaced the motherboard and PSU but the problem still persists. Any help??
 

Ralston18

Titan
Moderator
Update your post to include full system hardware specs and OS information.

Include make and model information for both old and new motherboard and PSU.

Do you hear any beeps? If so what is the beep pattern? Generally some series of long and short beeps.

Will the system boot into safe mode?
 
Jan 4, 2022
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there are no beeps, and it doesnt boot into anything, just a black screen. Also, the problem has changed, now it desnt post, but the fans get extremely fast and ive already tried basically everything :/
 
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