Powercycle your Dell laptop. With the computer turned off and unplugged, remove any external devices (USB drives, printers, etc.), then hold down the power button for 15-20 seconds. It will drain any residual power. Next, reconnect the charger and see if your PC powers on. Remove the battery. Thisvideo shows how to repair a laptop (Toshiba L655) that does not turn on, good power supply and good power jack, but it still will not turn on.Follow the Ifyou have a faulty or an underpowered PSU, your motherboard won't be getting any power which can cause your motherboard won't not to turn on. Check your connections. The motherboard is connected to the PSU via a 20 or 24-pin connector, while the CPU is connected by a 4 or 8-pin connector. Ensure that these connections are clean, tight ifyou flick the power switch on the back of the PSU it cuts all power to the motherboard. if you're moving it, working on it or don't like it drawing any power when it's off, no matter how negligible, then turn it off fully (if you are working on it, turn it off but leave it plugged in as ground is still connected even if PSU is off) if you Ifyour computer is not turning on and your power supply is okay, ensure the charger is plugged in correctly and to the correct port. Check whether the port provides power because not all USB ports do. Confirm that the AC adapter offers the proper voltage and amperage for your computer. 0 10,560. Sep 14, 2016. #3. that clicking noise is indicative of a short to ground somewhere, usually motherboard to chassis, but possibly wiring. Go over everything I would suggest disassembling the whole PC (video card, ram, everything, and motherboard too). Then reassemble it carefully. This should do the trick. .

computer not turning on power supply ok