HP EliteDesk 800 G2 not start

[Wiking007]

Hello. Tell me what's wrong with the computer. When power is applied, the computer starts immediately, while it emits signals, 6 long and 3 short ones, and so on constantly, tried to disconnect everything from the motherboard, removed the memory and processor, nothing changes.

[NonSequitur777]

Hi Wiking007,

From the limited information you provided, I would rank the defective PC components probability in descending order:

1.) Your motherboard,
2.) Video Card,
3.) BIOS ROM,
4.) CPU
5.) RAM

One more thing. Unplug the power supply to your desktop. Push the on-button until no more front panel LED(s) turn on. Then remove the CMOS battery for 20 minutes and then put it back in, reconnect power and turn on your rig. This procedure should reset BIOS and let's hope your PC starts up to default settings.