OK i removed the screen, put the battery back in, now I get 4 beeps only then nothing.
Beep codes say it is "System board-Security Chip" or "system Board". Guess I need a new system board!

Well it won't power on. The fan comes on, LEDs come on, no video even out the VGA port, then i get the beep code: 3 beeps followed by 1 beep followed by 4 then followed by 4. No video. Never appears to hit on the hard drive (no hard drive LED). I can't find any info on that particular beep code, I h...

I have a Thinkpad T43. It won't boot so in my troubleshooting I got to the removal of the CMOS battery, which is rated at 3.0 Volts. I reads 2.87, kind of low. Is this voltage high enough to do the job? My old electronics troubleshooting experience says probably no. If anything it should be AT LEAST...