[SOLVED] HP DC7100 SFF Won't start up - 4 beeps but not the power supply any ideas?

[rustycraig]

I have an HP DC7100 SFF desktop that won't start. I get 4 1 second beeps and 4 red lights when I try to start it up. I've read that 4 beeps means PSU but I replaced that and still getting the same issue. Any ideas what could cause this?

 

[Dark Lord of Tech]

It's a power supply failure.

Here is the list of beep codes for your PC:



Power LED # Beeps Event

Steady green None S0 System on (normal operation)

Blinks green @ 0.5 Hz None S1 Suspend

Blinks green @ 0.5 Hz None S3 Suspend to RAM

Off (clear) None S4 Suspend to disk

Off (clear) None S5 Soft off

Blinks red 2 times @ 1 Hz [1] 2 Processor thermal shutdown

Blinks red 3 times @ 1 Hz [1] 3 Processor not seated / installed

Blinks red 4 times @ 1 Hz [1] 4 Power supply failure

Blinks red 5 times @ 1 Hz [1] 5 Memory error

Blinks red 6 times @ 1 Hz [1] 6 Video error

Blinks red 7 times @ 1 Hz [1] 7 PCA failure

Blinks red 8 times @ 1 Hz [1] 8 Invalid ROM checksum (error)

Blinks red 9 times @ 1 Hz [1] 9 Wrong power supply input voltage

Blinks red10 times @ 1 Hz [1] 10 Bad option card

NOTE: Power LED blinks are repeated after a 2 second pause until issue is resolved,.

Beeps continue for 5 iterations and then stop.

hp.com