I have a D630 when I am in the BIOS menu I go to battery and it says not installed? I tried a different battery and it reads it no problem. Is there any other reason this could be happening other than dead battery? I hit the battery check button on the bottom of the battery itself and all 5 lights light up, does this mean anything or can it still be bad even with all 5 status lights on when I hit the button? Thanks