I am new here. I have an IBM ThinkPad 600 notebook which has big problems. The first sympton is "system regestray erro" after boot up. I tried to reinstall the OS, but no fix. Then, at on point, it only run 64K and display "ThinkPad" logo on the screen. Now, after I turn on power, only the fan works and no display at all. Is it a BIOS chip problem? Any suggestion will be appreciated.