What causes a red light blinking on a computer case and not booting
LED blinks 5 times
General Main-Board failure.
Test the Main-Board with the minimum hardware and reseat all the connections.
If the error persists, replace the Main-Board.
LED blinks 6 times
BIOS authentication failure.
Restore BIOS if available.
Press the Windows
+ B keys to do a BIOS recovery or replace the Main-Board.
Little Boy Blue, come blow your horn.
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