How do i access the power jack on my ibm thinkpad
To access the Power jack you need to disassemble to entire system.
Make sure remove power, battery then Memory and HDD. The CMOS battery must be remove also before do anything, (Or plug off from Motherboard) Any metal touches on board while battery is on, will destroy the motherboard. So make sure do not drop any screw on board with battery is on(CMOS) Or touch with screwdriver.
You need to parted out everythink with care and put aside by taking notes. every screw sizes different, wrong assembling will result the system not to power on again. Line up what ever taking off with care.
If you do so, make sure every socket you remove, seats back tide and nice, ANY banding, or HARD push will break parts, so be gentle. Do not band Motherboard, casues the copper lines cracks on board, result does not power on or even fry the board. If you will solder the Power jack, You need to be carefull, not to leak any leads on board or solder over used. To make sure you need also OHM meter to check the connections are ok. Reverse is important, be carefull and take your time if you want your system runs again. Mean time clean your fan system. You will need this.
If you do not experiences before, do not do anything. Take it to Tech.
I am not responsible what ever wrong doing because I advice to you something, what ever you do, it is your own risk. and Goodluck.
JMC