I have an IBM Thinkpad T42, 2373-FWG series, about four years old, recently replaced hard drive. Battery is equally as old, not subject to recall, but acting a little funny since hard drive replaced -- drains in 90 minutes as opposed to 2 and a half hours before. About two hours ago, my screen started flickering and hanging. The system completely froze. I pulled the battery and put it back in. Since then I cannot get the system to reboot: fan will run, power indication lights glow, but rarely do I get an opening screen and if I do, it starts to flicker and freezes before I get my password entered. Screen now will only stay black; no opening screen to allow me to go into safe mode. If any ideas, please respond here or in private messages.