My computer has been working fine for a while. Then one day I tried hitting the power button and nothing happened. I hit the thing repeatedly then all the sudden it turned on. This happened a few times then started working fine after a while. Now, a few weeks later, it started again. Mashing the power 100 times started it up, but once i got to the desktop, it kept freezing, and the power button stopped working. I had to unplug it to get it back on. Then i got absolutely nothing but a spinning cpu fan, and my hd drive failed to spin, and cd drive failed to open. It's like all power is lost but the power to my motherboard. I took it apart, wiggled all the wires around, and re-plugged them back in, blew out all the dust, etc. It started working again, but I still dont know why it keeps doing this wierd stuff, anyone know??

Oh, and my clock keeps losing time too, if those two problems can be linked together, i dunno.

Try reseating the motherboard power connector. The losing time might be due to a dying motherboard battery.

Your clock is losing time because the BIOS battery is getting weak; that may be some of your other probs also, because it won't hold the BIOS settings anymore. Replace the batter, it is about the size of a silver quarter on the mainboard. Pop it out and get a new one at the drugstore. As to your other problem, you may just have bad connections. Shove together firmly every connector/plug you have; especially make sure that the main power cable from your power supply is firmly plugged in to the mainboard socket. Another thing to check is the start button itself. There is a small cable running from the power button to a tiny socket on the mainboard. It will be one of several in a row, tiny and black. If you have your manual, it should show it. The plug will be labeled PWR or something like that. Pull it off and push it back in and see if things improve. Here's another test: after you pull it off, take a screwdriver and short the two little pins on the mainboard socket. Don't worry you son't hurt anything, you are just doing what the switch does when you press it. The computer should start every time. If it starts several times in a row, your power switch itself is bad. If it still will/won't start, then we look elsewhere for the problem. Another way I have found bad connections is when the next time it acts up on you again, remove the cover, Keep it plugged in to the wall socket, and carefully push on connectors 1X1 until it suddenly starts, and you found your bad connector. Before we start replacing things, it may just be loose connections, so check those out first.

I am having sort of the same problem with mine. I powered off and then it didnt power back on- the monitor displayed "no input signal". I checked the connections and everything was alright. I screwed up and upped the voltage to 230 and it booted but still did not display. I fixed the problem, Video card was loose. But now the pc will not start. I hit the power button and the fans do a sort of half-turn and that's it. I guess the power supply is shot but any suggestions would help me greatly.

Ok, so it started acting up on me again today. First thing it did was freeze while i was using it, sitting there with an hourglass and no hd movement. I decided to leave it alone for a few hours, and when i came back, it was working again. So I shut it off, and the power switch started acting up again. I opened it up, and tried to short the pins for the switch, and still nothing. I kept doing it continuously (the same way I press the button a bunch) and it powered up after about the 10th try. I turned it back off, reseated the mainboard power, memory, then plugged back in the power switch. So now everything is up and running fine again, and I'm still confused as hell. One thing I did note is that when the thing freezes, all power is lost to the HD and CD, but the computer stays running, just frozen. SO, failing power-supply or what??