My Optiplex 780
- will not post
- will not beep
- will not output any video
When I push the power button,
- Diagnostic lights 1 & 4 flash
- Power button is of solid amber
When I turn the computer off:
- if I press the Power Supply test button, it illuminates green
If I disconnect the power cable
- A tiny LED on the circuit board (next to AUX PWR label) stays amber for a minute or two.
Diagnostic lights 1 & 4 are not documented in the Dell manual. I have tried to disconnect all peripherals, all drives, all cards, even all RAM, still no POST no beep, no video: just the fan running, and diagnostic lights flashing.
Any hope for this computer?
Thanks for writing to us.
Diagnostics led 1 & 4 indicate power connector faulty. Please reseat the PSU connector if not yet done.
If issue still the same, then consider replacing the PSU . Sometimes the PSU connector on the motherboard to be faulty.
Do let us know how it goes post reseating the PSU connector.
i have dell optiplex 780. i have a problem of solid amber light.I have cleaned ram,cleaned CMOS but problem continues how can i solve it?pc turns on,fans are working normally but no display on the monitor
Solid Amber Power Button is Bad Motherboard.
You did not say which SIZE you have.
The Optiplex 990 says this.
1 4 MBF (Motherboard Failure) is well documented.