A21M Boot/Hibernation problems!!

[srkumar1946]

Hello Friends,
I am new to this forum and this is my first posting.I am having an A21M-2628 G2U thinkpad laptop computer.It is 5 years old and I bought is as an used computer 2 years back.It was working without any problems till recently.of late I am also experiencing the boot/power-on problems intermittently as reported by a number of people in this forum and elsewhere.Short of replacing the systemboard I have done whatever possible as advised in this forum.sometimes I am lucky;otherwise not so lucky.I am facing one more problem from today.I think I am to be blamed for this which I feel is due to selecting hibernate mode inadvertently in the power management option.I ticked both the options to hibernate when the power switch is operated as well as when the lcd lid is closed.This I think is a mistake,because with the already existing trouble of power-on problem,now I can not press the power switch to boot the computer,this will not allow the computer to boot since pressing the power switch will cause it to go to hybernation.please correct me if my assumption is wrong.or will it start by following the techniques of removing main battery,power adapter,pressing the power switch about 20 times and holding power switch for 20 seconds etc.any suggestion and advice will be very much appreciated.The OS is Windows 2000 service pack 4.also is there a way to disable the hybernation mode set by me?Thanks a lot to everyone,
Ramkumar
Mumbai,India