Laptop not used for some years. could enter bios OK to reset Replaced U/S CMOS battery with no problem. Restarted............ Message press F1 ibm bios setup press F11 to invoke IBM product recovery program press F12 for boot device list pressed F1..new message.......... ERROR warning IRQ not configured-PCI Bus 00 device 12 function 00 bus 00 device OA function 00 bus 00 device OC function 00 Press F1 for bios setup I press F1 and nothing happens press F11 nothing happens press F12 message= preparing boot device list then error message as above repeats tried F2 before boot=no joy.

just replace the CMOS battery with another new on @ 3 volts.

Same problem.

Any ideas ??? just replace the CMOS battery with another new on @ 3 volts. Same problem. Any ideas ???

Hi Mike,
As we are here to help and assist each other, I assure you my best cooperation/efforts to the best of my knowledge and experience. I have spent hours digging out the issue. Checked the troubleshooting guide, Repair manual etc. (available at Official IBM Support) and Im still suspecting CMOS failure in some way as the behavior of the system is just the same as if without a CMOS (that can be verified by booting the system without COMS and without pressing any key from the keyboard, Im sure you would get the exactly the same message).
All I can think of now is that CMOS may not be having proper connection with the motherboard. Checkout the minute solders below the CMOS plastic housing (these may require re-soldering). Also, make sure that the keyboard is properly fixed. Its ribbon cable etc. and the system should respond to the keyboard. I wish for luck. Hi Mike, As we are here to help and assist each other, I assure you my best cooperation/efforts to the best of my knowledge and experience. I have spent hours digging out the issue. Checked the troubleshooting guide, Repair manual etc. (available at Official IBM Support) and Im still suspecting CMOS failure in some way as the behavior of the system is just the same as if without a CMOS (that can be verified by booting the system without COMS and without pressing any key from the keyboard, Im sure you would get the exactly the same message). All I can think of now is that CMOS may not be having proper connection with the motherboard. Checkout the minute solders below the CMOS plastic housing (these may require re-soldering). Also, make sure that the keyboard is properly fixed. Its ribbon cable etc. and the system should respond to the keyboard. I wish for luck.