Bob,
Time to change the battery.
Most CMOS battery, even if PC is left on at all hours, will deplete themselves into a dead state.
It is an alkaline battery, not rechargeable.
Tim
-------------- Original message ----------------------
From: Bob Gregory <[log in to unmask]>
> Setup:
> - Dell Dimension E510 will not boot unless CMOS battery is removed. Works fine
> after pressing "F1" upon BIOS warning. With battery installed, green
> motherboard LED is lit and power button light blinks amber. Resetting BIOS but
> did not have impact. P/S is good. Removed add-on components and memory to
> isolate problem but nothing helped. Remove battery and PC boots.
>
> Any suggestions?
>
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