press and hold the set button to energise the controller, keep the set button always pressed (about 3 seconds), until the three lights at the same time into a double blinking state, release the button, the indicator becomes a single light double blinking, that is, on behalf of entering th...
wait until after all the lights on the MOBO have gone off and then plug the PSU back in and turn the PSU on. At this point the board should light up but again the LED next to the 8 pin connector should not be lit. If not lit power on the MOBO and see if the CPU light ...
Intel-based Mac computers such as the iMac rely on a combination of tones and blinking LED lights to display Power-On Self-Test (POST) error codes.If the computer detects out-of-specification or no Random-Access Memory (RAM), the screen will remain black but the computer...