3 long beeps and 4 short beeps

[Player_412]

I have a Elitedesk G2 800 SFF and it randomly sparked near the pcie slots

After this is doesn't boot and does 3long beeps and 4 short beeps

[BeemerBiker]

The red light blinks three times, and then four, short white light blinks (3 long red, 4 short white)

This condition indicates a potential power system failure.

1. Reduce to minimum configuration (CPU, System board, PSU, 1 DIMM of memory), and then isolate the failed component.

2. Reduce further if issue persists.

3. Test your system with a known good PSU.

4. Contact HP Customer Support for further assistance to replace the component, system board, processor (CPU), or PSU if the issue persists.

Could b motherboard or power supply\

Click here to check warranty
and
Click here for world-wide contact info
Or contact the closest authorized service center

[Player_412]

I know that the psu works since the cpu fan and the Hard drive spin up for a while (1 second) until the beeps.

[BeemerBiker]

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@Player_412 wrote:

 it randomly sparked near the pcie slots

After this is doesn't boot

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Go to the below site and enter your serial number
https://partsurfer.hp.com/partsurfer/

look for your PC board, it may be 795206-002 (just guessing)

then find a replacement if out of warranty

==========or========

get a magnifier and a light and look inside the PCIe slot for debris that might have caused the short and remove it.

[Player_412]

I've already removed the piece, still no boot

[MattAV]

Dear Player_412,

welcome to the community. I am not an HP employee, but this sounds like 1 of three problems.  Power Supply, CPU or the Motherboard itself.

If you haven't read the Service guide for this I'd suggest giving that a read. The link below should be it:

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=http://h10032.www1.hp.com/ctg/Manu...

In any event the beep code you mention is a power failure . The sequence you can try is.

1. Changing the Power Supply

2. Changing the CPU

3. Changing the system board.  ( I would also check the board for any blown capacitors)

If this computer has a warranty you should contact HP Tech Support and get a replacement part for it. If not you will most likely will not as this is a model that was released toward the end of 2015.

I have found some success with parts on ebay or amazon using the product sku which usually on a sticker on the motherboard around the CPU.

This board with the arc from your PCB slot I suspect the board.

Try that sequence and let  me know if that works out for you.