1. Measure the CMOS battery voltage? Not in spec? Replace.
2. Reset the CMOS bios settings and try again.
There are documents at dell about this machine so I won't duplicate those here.
Bob
hi,
my brother who is 14yrs old owns a Dell Optiplex GX240 with 1.7Ghz Processor, 256mb RAM and 20GB Seagate HDD.
The problem is that some days ago when he started the computer using ON button it was not getting on.
when he told me then i checked it's power supply, but it's power supply was ok and giving current to board.
i replaced the RAM but same problem...
There is no beep sound at all and no display!
the button which is used for the ON purpose is not showing any light but in the board there are lights. i also checked it's graphics card on a other pc which was working fine.
can anyone tell what can be the problem and how to solve this?

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