My computer still won't turn on!?

Question

I had a previous question open about my computer that randomly decided to not turn on after 4 months of no usage whatsoever. I recently turned it on to install a new DVD burner in it and turned it off. Next day, it won't turn on. Now it's happened before, and usually I just unplug everything and plug it back in. Not this time. Now, I tried unplugging ALL the components from my motherboard: DVD Drive, HDD drives, Graphics Card, RAM, all of it. Now my CPU fan turns on, spins a little then seems to lose power but before it loses all power it spins a little again. Is the problem that my PSU is dying and it can only operate the CPU fan on my mobo? Because I tested the PSU in another computer (a lot less powerful, 800mHz processor) and it worked fine.
Here are my system specs: 2.66Ghz cpu, 256mb radeon 9550 graphics, 1gig RAM, 2 HDD totaling to 100gigs, and 1 DVD burner/reader/etc. (Hand-built, not bought from store)
Older system that i tested: 800mhz cpu, 256RAM, 64mb GeForce,10gigHD,CD

Answer 1

That's funny that you know all of this technical stuff but not how to turn it on...

Answer 2

I suspect the power supply is failing.

You could purchase a power supply tester. They only cost about $10 plus shipping. I got mine from Tiger Direct.

It has never let me down. If it says it's bad, it's bad. If it says the power supply is good, look elsewhere for the problem.

Your power supply has more than one circuit. a 12 volt circuit, a 5 volt circuit, and a 3.3 volt circuit. Any of these circuits can fail while the others still work. The cooling fans, CD/DVD drives, hard drives, and motherboard use 12 volts. But the 3.3 volt or 5 volt circuit could be dead which the motherboard, serial ATA hard drives, and motherboard use.

With all of the add-ons you have, it is also possible that your original power supply is not up to the task. Most computers ship with 150 - 200 watt power supplies. This is just enough to operate the PC as it ships from the factory. With all of the components, you should have a 400 - 500 watt power supply.

Answer 3

The CPU, motherboard and/or ability furnish is overheating that's why it happens once you're observing video clips or working various purposes. If that's the CPU or motherboard, the onboard temperature sensors are detecting the issue and closing right down to shop the computing gadget. usually, the computing gadget could beep with regard to the overheat concern yet yours may well be different. First, whilst the computing gadget is working, positioned your hand close to the fan on the decrease back of the computing gadget the place the ability cord plugs into the container. confirm you sense air flowing. in case you do no longer, then the ability furnish's fan may well be lifeless. you will could change the ability furnish (or have a fix man or woman open the ability furnish to change its fan). If the ability furnish is shifting air effectively, and you're delicate establishing your computing gadget, open the container and discover each and all the followers that are interior. there may well be one or 2 fastened to the front, rear or sides of the case. there is additionally one on the CPU with a extensive metallic heatsink. verify that the only on the CPU is working. If it is not spinning, initiate enjoying a action picture and it might initiate going earlier the entire equipment turns off. If the fan on no account activates, it desires to get replaced. verify the different followers interior the case. they might purely change on whilst the computing gadget is working no longer elementary so play some video clips and spot in the event that they initiate working. If one in each of them is lifeless, that is worthwhile to to change it. the main serious followers, however, are the CPU and ability furnish ones. Now that the computing gadget is open, clean each and all the followers and vents with compressed air. you're able to purchase cans of compressed air from computing gadget/electronics shops. do no longer use a vacuum purifier because it could generate an incredible style of static electrical energy as nicely as suck up little factors out of your computing gadget.

Answer 4

I agree with "Mad Jack".

The newer processors require more power than the <1 GHz processors not to mention the additional power required for your add-ons.

I would spend a little more money and buy a higher wattage power supply (> 400W).

My only worry is the new power supply will not physically fit into your machine (unless you built it). I had to replace the power supply on my work computer (Compaq) and had to modify the mounting brackets to make it fit. My suggestion is to find out what type of case you have (ATX, MicroATX, etc.) either from your manual or from the manufacturer's Tech Support.

Good luck!

Answer 5

I'm not sure how old your system is, OK. That could be something to consider. I have known the turn on buttons to break after a certain amount of usage--some go more when people use the switch to turn the computer off and on all the time (even though its better to turn the system off through your program). You might want to look into that.

Answer 6

Sounds like the motherboard is stuffed. If you have disconnected all the components and still doing the same thing, and the power supply works on another PC.

Try another PS on the bad motherboard first, but I would say you are up for a new motherboard.

Answer 7

Problem is either the motherboard or power supply. I had a similar problem as yours, did the same things you did. The mobo was more than 3 years old. Changed the power supply and it worked!

Answer 8

Check the voltages for your power supply, I use SpeedFan to check it. Hook it up to the other computer and run SpeedFan. If the voltages are low, it might not run the hardware that you have installed.

Answer 9

try upgrade your power supply of your cpu to 500 watts..

Answer 10

i still say psu or you could try to see if a bad grphics or sound card