+ 0 Votes Steffi... boxfiddler Moderator 6 years ago can you hear the hard drive spin up? Also, if you open the box, is the light on the motherboard lit (should be green I think)? Once you open the box, if the mobo light is on, check all the connections to be sure they are tight. Do you get any screen messages at all? As in do you think that you can get into the BIOS? And last but not least, without insinuating anything, is the monitor powered on or has perhaps that plug been knocked loose? + 0 Votes So, lights no go, but Dumphrey 6 years ago fans turn and cd rom door opens and closes. Any beeps as it boots up?Is the graphics card built in to the motherboard or an add in card?Can you take the side of the case off and see if the cpu fan is still turning?This could be one of several things... power supply (lost low voltage rail), cpu (just fried), or mother board.What I would do:Power off, unplug and remove all cards, add ins, usb devices. Try to power up.power down and remove ram till you have 1 stick. Rotate through untill you have tried them all.What you are looking for is: 1)Will it beep on boot?Does it work right minus a componant?Are all fans turning (cpu, case, power supply).Have any of the capacitors on the mobo ruptured (tops swollen and distended, or weird coloring/liquid. Should look like little flat toped cans.) Any weird smells (burnt plastic/hair).have you tried different mice/keyboard? Are they USB based or ps2 (round plugs on end). If USB, do you have PS2 available to try (turn off usb in bios). + 0 Votes Some suggestions PlipO 6 years ago Have you moved the PC recently?The monitor's signal cable might have come lose or the pins on the cable might be bent.Has the monitor cable been disconnected recently ?If you have two graphics card in your PC; the cable might be plugged into the one which is not set as default.This is unlikely but possible, if you do have two graphics cards in your computer; the default settings might have changed in the bios and now the secondary graphics is set as default.Has someone or something tugged on the signal cable ?Again, cable or graphics card might have come lose.Do you hear any strange beeps from the PC ?Do you have the opportunity to test the PC with a different monitor, this will identify if it's the computer or monitor at fault.Do you have access to a laptop, you can test the monitor on a laptop. + 0 Votes If not even posting jdclyde 6 years ago sounds like it HAS to be CPU or MB.I don't suppose you know anyone with an identical system that you could swap out the CPU with? + 0 Votes Update Steffi28 6 years ago Just tried everything saidmouse, keyboard and monitor all working fine on other machines, inside no trace of anything on the mb like weird colouring or liquid or anything, all fans are working fine, tried taking out ram no beebs, tried taking out cpu no beebs. Hubbys sister has a similar computer we can try to take CPU out of to try that, thanks for all the help guys :)Oh and lights aren't working on the front because the switch that attaches the led to the motherboard is snapped and wont connect are they easy to replace?Thanks :) + 0 Votes Its mean ! internetspider 6 years ago Ur computer has no display, try to do following:1.Unplug everything like power, vga everything.2.open the case remove battery and short it for 5 to 10 seconds. (dont short battery short the place where battery sits).reconnect and start the system. + 0 Votes I think Scummy :) Jacky Howe 6 years ago is on the right track. It would be the first on my list to test. :)Go to this site and read the instructions. Save the ISO version of the file.Instructionshttp://oca.microsoft.com/en/windiag.asp#topDownloadhttp://oca.microsoft.com/en/windiag.aspCreate your CD and test your Memory.http://www.petri.co.il/how_to_write_iso_files_to_cd.htmhttp://www.wizardskeep.org/mainhall/tutor/neroiso.htmlEdit: It would be easier to test the RAM in the other PC.