Question HP 290 G3 SFF Desktop PC - Power Cycling - Won't Boot

[astyr]

I work for an IT company that occasionally handles repair requests.

HP 290 G3 SFF Desktop PC > MBD Groot Rev A: M11 > i5-10505 > 2x 8GB DDR4 RAM > 180W PSU (Stock) > No Storage

PC returned for failing to boot.

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PC was power cycling. CPU fan spinning for 2 seconds. Power LED light ON. No POST.

• CMOS reset / Removed CMOS battery / CLR_CMOS jumper
• Tested PSU with Tester (12.1 V) Multimeter (12.08 V)
• Tested Working PSU (Same Model)
• Tested 1 stick of RAM / both DIMMS / both Modules
• Tested i5-10500 / Tested i5-10505
• Tested 2 different CPU Fans
• Cleaned CPU_FAN Header

Couldn't see any physical damage to components / No water or liquid damage on both sides of board.

Starting to give up around this stage.

I tried no CPU with CPU Fan. LED: ON and Fan spinning.

Is the motherboard possibly shorted (partially shorted)? What could cause this?

 

[Lutfij]

Welcome to the forums, newcomer!

Is the motherboard possibly shorted (partially shorted)? What could cause this?
Perhaps the BIOS for the prebuilt's motherboard has conked out/ended up corrupt. Might want to read through this, perhaps in conjunction with this guide.

Moved thread from Motherboards section to Prebuilt & Enterprise section.

 

[astyr]

Cheers Litfij, I'll give that a go tomorrow.