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philf:
Andrew,

According to the manual for your your PC these options should be in the BIOS:

Power Management
AC Recovery Determines how the system responds when AC power is re-applied after a power loss. You can set the
AC Recovery to:
Power Off (default)
Power On
Last State

Power on would be my choice with the program you want to run in Start Up. (Or a scheduled task to run on start up.)

I am using an old Dell PC in the power house of our hydro scheme and use this facility. It has a UPS but I had to remove the UPS software which turns the PC off in the event of a Power Failure after a preset time because the PC then didn't wake up.

Phil.

awemawson:
Phil, yes those are the settings I've experimented with.

Reverting to 'Power On' works fine if power was lost when the PC was running, but of course Windows objects to just being turned off.

Reverting to 'Power On' Does NOT work if the PC was closed down in an orderly manner.

I reckon a strategically positioned spring loaded plunger on the enclosure door pointing at the 'Power' button may end up being used :lol:

PK:
The power button will just go to two header pins on the motherboard. Could you not unplug it and run them to a connector on the back of the box?
That way you could plug an external power switch in. It'd be a neat and tidy solution for you. You could even keep the switch on the case in parallel (they are normally open switches.

I'm happy to put this and the external power switch assembly together for you if the electrickery stuff isn't your thing....

PK

Pete.:
I've had several SFF optiplex's and I do recall having this problem with one of them. Only trouble is I cannot remember how I got rid of it. Probably with a clean wipe.

Do you have a Dell install disk? With those you can re-install windows without the need of a key.

awemawson:
PK, the whole front panel electrics including two USBs etc as well as the relevant button are on one multi-way header and it's extremely cramped.. This thing is small! But thanks for the suggestion and offer.

Pete, I think it's working as they designed it, another Optiplex 780 USFF that I have does the same.

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