Power adapter plugged into the wall socket, green LED on power adapter lights up. Soon as you plug the power into the motherboard the LED on the power adapter goes off. This is a safety feature built into the power adapter for protecting the itself from getting zapped by turning itself off. The only way to get the power adapter working […]
Dell D620 boots up fine execpt for the display is fuzzy on the LCD screen. Works fine when connected to the external monitor. I was sure the issue this the LCD panel. Tested with known good LCD ribbon cable, same issue. Tested with known good inverter, still the same. At this point everything points to […]
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Dell D630 damaged USB port and no longer powers on. Light comes on the off. Pins on USB port touching the ground. Straigthen out all pins but still won’t power on. Found burnt/spark mark in area circled in picture. Cleaned with toothbrush and finally it’s powering up without problem.
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Common problem with these models. Check the FL1 filter first. It tent to lose contact over time.
When you run the built-in diagnostic with the FN key, Numlock and Caplock key flashes. Scroll Lock key stays on solid. This indicates the problem is with the onboard video card.
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The page shows how to read the Dell diagnostic light codes. Click here for more info.
Testing the MOSFET near power in section for short.
When buying replacement make sure to buy one with the exact same part number. Even same model may have different motherboards. See example below. Both are to for the same model.
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To access the Dell build-in diagnostic tools press the F12 key when you see the Dell logo screen. On some newer models you can hold the Fn key then press the power button to turn on the system.
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