I know you're suppose to take it out when you need to remove a BIOS password, but what happens when it's not put back in? Will the BIOS work correctly/will it not boot at all? My reason for asking is that I have a dead Latitude that just so happens to not have a reserve battery (as Dell calls it).

Would usually boot ok, just won't remember anything. Data & Time for example.

Most Motherboards, have a CMOS battery that you can replace. I recently rebuilt a Laititude D600 and was nice and easy - good access to everything etc.

Dazza :cool:

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