Compaq Presario 2100 Boot Problems

  help01 12:41 13 Jul 2009

Computer will boot if Ac adaptor is pluged in but not from battery?

On battery starts up, windows logo comes up and then black screen,
battery is ok did battery checker, charged-discharged A1 condition,
Once started from on Ac power you can remove Ac plug and laptop is ok, will last 1.30-2 hrs.

Have reloaded windows from restore disks but made no differance.
Any advise would be greatful, Has laptop as turned into a desk top because it cannot be used without first starting it with the AC power pluged in

  Taff™ 16:34 13 Jul 2009

My solution for anything like this either works or it doesn`t. Remove power supply and battery. Press and hold the power button for a minute. This discharges a capacitor or the like which confuses the motherboard as to what is the current power source. Reconnect the power supply only and boot from that. Shut down and then try with just the battery.

  woodchip 16:53 13 Jul 2009

the battery is on its way out, it cannot deliver the startup punch

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