We'll it started when my internet company told me to turn off my computer while they reset my connection (dont ask me why) so i did and after i got off the phone with them my computer wont start no lights come on no fans come on.... nothing i opened it up to make sure that the power button was still connected and it is im not sure what the problem is any information would be helpful Thank you. Oh and its an HP m7640n

Let's start with the basics. Is it plugged in? If so, unplug it, open the case, ground yourself by putting both hands on a metal part of the case. Now remove the RAM, unplug the hard drive, DVD Drive, and the floppy drive if you have one. Plug in and turn on. Does it come on now? If not, unplug it ground yourself and take out the video card if there is one and remove any and all PCI cards and USB devices and try to boot up again. WinSimple Software CompTIA A+ Certified

Alright we'll ill do this after work then thank you for the quick response. But if you could give me a scenario what is it most likely? if you dont mind telling me.

The 'most likely' is the power supply and/or the motherboard. The above trouble shooting procedure, suggested by Rayburn, will confirm that it's one (or both) of them.

Power supply or power cable. But verify the wall socket it good by plugging something else in it.

"The above trouble shooting procedure, suggested by Rayburn, will confirm that it's one (or both) of them." That's correct. The procedure I gave is to rule everything else out too. WinSimple Software CompTIA A+ Certified

Hey guys thanks for the info and tips i had already ordered a power supply 2 days ago but after that gets here i'll go ahead and test the other things if that doesn't work do you guys have a link or maybe a page that has information on how to check the stuff you guys mentioned?