It shows power but wont turn on - Dell Vostro 420 Desktop Computer

dead power board

Have you tried a different HDMI cable?

try to turn on/off the pc , remove all the cables and battery . Press and hold the power battery for 5 seconds . Reinsert the cables and battery. Turn on the pc, if the screen did not show up, please call tech support for possible repair...

Have you verified #1 that your outlet is putting out 120 VAC? Have to checked input power fuse inside chasis? What about a stuck power on switch? Unplug all access. except the TV and try powering it on.

am sure about the computer part but for the xmb i can help reset ur ps3 by turning it on then turn it off by holding the buttonthen it back on by holding the power button it should beep pause and beep 2x this will reset ur display option back to normal then ur cables make a difference if ur using a SD TV use regular cables if HDTV use hd cables only on hdtv if use on SDtv it won't display or ur ps3 is set to an hd setting like 1080p it won't display on a sdtv so reset ur ps3 by holdin power button hope this help u

i pluged the usb in to transfer some files and mp4 turned off it self, and now it wont turn on. i tried reseting it but it stil wont work. When i put it on charge the power light shows that its charging but wont ******* turn on.

Have you changed the power cable? most likely faulty power cable. but if that doesnt fix it your ipod has an internal problem and needs to be sent in for repair I had same problem but new cable fixed it.

Replace the power supply

Make sure it is not in download mode!! a little switch on the back of the device

You might of fried the whole motherboard when it sparked. Check if there is a fuse. Bridge the gap, and it should turn on. If not PULL THE PLUG.its something else that went wrong.If you don't, it smells really bad. Ive learn't from experience...