Hi, My labtop was doing fine until this afternoon when I tried to open a game (solitiare),it just went off saying "auto Hibernating".And I couldn't go back to windows, and other thing, it gave me a "battery flat" warning while it's connected to AC power. Any suggestion plz, thanks for any help in advance.

try removing the battery and just using AC power. Either your battery and/or the charging circuits on the system board could be going bye-bye. You may want to go to the manufacturer's web site and see if they have any diagnostic programs for your laptop.

Your auto power management is set to go into hibernate if the battery gets low. It sounds like a power problem on your system. Try removing the battery and starting on AC power only. If this works then start the system with the battery installed. Are any of the lights flashing different colors than normal? As far as power failures they can range from different problems; 1. The battery is dead and shorted. It can cause failure to boot with or without AC power. Generally can be bypassed by removing the battery. Cure = replace battery 2. The battery is too low to run the system and when removed you can not start on AC power. There are a few causes for this and some are: a. Bad power adapter = replace adapter b. Bad power charge circuit on the motherboard = replace motherboard c. Bad battery, will not charge / hold charge = replace battery d. Different batteries will not charge in unit = bad battery recharger on mother board and it needs replaced Does the unit let you place the battery in a second slot? Try switching the combinations listed starting with removing the battery and see what happens. Good luck Richard