# Step 1 Turn off your XBox 360 console and unplug it from the electrical outlet. Unhook all cables from your console. # Step 2 Error codes reading "E67," "E69" or "E79" signify a malfunction in the hard disk drive. Carefully remove your hard disk drive. Clean the contacts with a cotton swab dipped in rubbing alcohol. Reinstall the hard drive and reboot your system. The error is fixed if no red light reappears. You will need to buy a new hard disk drive if the one red light is glowing again. # Step 3 Error codes reading "E64," "E65" or "E66" indicate a problem with the DVD drive. Remove the DVD drive and clean the contacts with a cotton swab dipped in rubbing alcohol. Hook the DVD drive back up and close the eject door. Make sure the cable is connected properly to the console. Reboot your console. You will have to purchase a new DVD drive if the red light is still glowing. # Step 4 An error code reading "E81" might indicate a failed update. Turn off your XBox 360 console and turn it back on while holding down the sync button on the console. This should fix all failed update errors. # Step 5 The one red light error might lie in the memory interface if no error code appears on your screen. Remove the memory and gently clean it with a cotton swab dipped in alcohol. Put the memory back into the slot and turn your system back on. The error is fixed if the glowing red light is gone.