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This error message is generated when the BIOS Date and Time is incorrect. Go into the BIOS configuration to change the Date and Time. When you reboot and still get the same error message then the BIOS battery is flat and needs to be replaced and the Date and Time setting needs to be change to the current Date and Time after replacing the battery.
If you cannot get into the BIOS configuration (press F1 on bootup) or you get a lock icon in the top LH corner of the screen, this is a Power on Password symbol, enter the passsword to bootup the laptop and then press F1 to get into the BIOS configuration.
First, confirm that it is the screen itself. Connect the video output to a known working monitor and then power on your Thinkpad. if the known working monitor behaves the same way you can rule out the laptop's monitor as the source of the problem. This may be the BGA, Ball Grid Assembly, leadless soldering problem related to video chips on the motherboard, but first test the monitors.
The Power On Password problem is near impossible to crack. It is designed to prevent unauthorized access to the Thinkpad and removing the BIOS battery will not remove the password because the password is stored on an EEPROM chip. There are no backdoor passwords available, the only option is to ask the person who set the password. OR There is a way to hack into the Thinkpad to see and remove the password but it requires electronic skills, a program and a working computer. For details on how to do this go to :- http://sodoityourself.com/hacking-ibm-thinkpad-bios-password/