When I press the on button nothing happens. When I hold the button onit blinks and the fans run, I had a noisy case fan but I replaced it,Could it be the bios battery is weak, I never power it off before andnow I can't get it on.
How can I check the power supply to see if is bad?
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When you powered on the machine did you hear any beeps, hear the fan running, the disk drive running, lights blinking, hear the cd drive click, see the light on the cd drive door for a second or two when it clicks? If these things are happening you are getting power. If not, your problem might be with your power supply, hard drive or motherboard. Remove the power cord, then press and hold the power button for 30 seconds, then plug it back in and press the power button. if it boots you had a static charge. If you get nothing at all but a silent system your power supply is bad. If it sounds like your computer is running but you can't see anything on the screen you might have a problem with your screen or video card. If you have another monitor try using it and see what happens. if it works so you can see things then your monitor was bad. If it does not work with another monitor but you still hear fans, and see lights and hear the disk drive spinning, then your video card is probably bad.
Make sure all fans are running power supply one to hehe Maybe a bad power button? I had a gateway that did some thing very close to that because the cpu fan was not turning and a hp that did that because the power supply fan was not turning. Thats where I would start then make sure the mem is seated good and not bad you know the drill ;) if you replaced the power supply with a factory replacment it should be a voltage or wattage problem. Might also try a hard boot the power plug take the cmos bat out hold the power button down for 20 or 30 secs some people say to leave the cmos bat out and try to fire it up. I know that works on some laptops but I always had better luck putting it back in for desktops cant hurt to try it. If you have two ram sticks in it pull the # 2 one and try to fire it up if nothing changes swap the # 2 one with # 1 leaveing slot 2 open and try it that will tell ya if it is a bad ram stick I dunno just my two cents hope it helps
Your psu is works fine. First open cpu cabinet and find motherbord. Pull CMOS cell from m/b for 10 minutes. Refix RAM Memory. Pull procesor fan and processor clean dust from all parts. Then fix processor fan and processor. Reconnect ATX connector to m/b. Remove pci cards from PCI slot then check. Let me know if you need more assistance. Thanks.
That was pretty unclear. Is there a kind of burning symptom that suggests a short to you? It seems to me that what happened is that either there was a power outage and your system thus shut down...all you'd have to to would be hit the computer's power button to turn it back on...or a fan somewhere died and therefore the system won't power up until you replace or repair that. At least get a vacuum in there and brush out the dust so you can work.
What happened when you got a simplified system that 'worked'? Was the power supply's fan spinning, at least? What's the green light on, anyhow?
Typical problem in most computers, the fan is experiencing a "burn out." This means there is either something caught in the fan causing it to create noise, or the motor is going bad. there are two fixes for this problem.
1) open you computer's case according to its manual and remove the system cooling fan and give it a thorough cleaning.
2) you may need to replace the cooling fan with its recommended replacement model.