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Caps Locks Blink for Laptops Troubleshooting

Caps Lock/Num Lock LED               Component Tested    Error Condition
LEDs blink 1 time    CPU                      CPU not functional
LEDs blink 2 times    BIOS                    BIOS corruption failure
LEDs blink 3 times    Memory                Module error not functional
LEDs blink 4 times    Graphics               Graphics controller not functional
LEDs blink 5 times    System board        General system board failure
LEDs blink 6 times    BIOS    BIOS       authentication failure

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