@ ferri
You should be able to boot into BIOS with the battery removed and your laptop plugged into an AC outlet. If you can't, your BIOS flash may have gone wrong or there are other problems beyond what you have described that I can't help you with at this time. It is beyond my knowledge
. Maybe someone else around here can help.
__________________
P4P800E-D:~:P4 3.0C@3.75GHz:~:Zal7000AlCu:~:OCZ4001024ELDCPER2-K@250MHz 2.5-3-3-7
WinXP SP2>2X160GB Samsung SATA ICH5R RAID1:~:2x80GB Samsung SATA Promise RAID0
ATI A-I-W X800XT~SB Audigy2 ZS~2X BenQ1620~Antec SLK3700AMB~Antec SmartPower2.0 500W