Connot boot to bios setup

Hello,after replace cmos battery cr2032on pc motherboard and clear cmos setting,still cannot boot to bios setup display.although the display show cmos checksum error and loaded default setting!when press the F1 will continue boot to window 7 but lf press for del key enter bios setup will show black display !
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More about connot boot bios setup
  1. Look for a jumper somewhere on the motherboard that says "clear cmos" or reset cmos...
    Switch it for 30 seconds, then put it back.
    Start the machine, and it should be fine, unless there is a real hardware problem somewhere.
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