I have a computer that i built by myself. I built it last year. It was working fine till few weeks ago. Now my monitor says "No Signal" when i turned my computer on. At first i thoguht my video card is not working, so i changed a video card but the problem still exist. Now i have no idea what's goin on. The monitor works, i tried it on the other computer. Can anyone help please
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Need HELP
- Thread starter azn712
- Start date
Full specs would help a lot. Brand/model of all your parts in particular. Any strange behavior or instability the system has exhibited in the past would be helpful too. Usually I'd ask for a diagnostic report too, but since you can't boot up we'll just have to work with what we have.
Have you tried starting the machine up with minimal components installed? Power supply, CPU, one stick of ram (try several sticks if possible), mainboard, and video card (try vid card and integrated graphics if you have them). If you have any spare parts swapping things out can be very helpful in figuring out what's broken.
Have you tried starting the machine up with minimal components installed? Power supply, CPU, one stick of ram (try several sticks if possible), mainboard, and video card (try vid card and integrated graphics if you have them). If you have any spare parts swapping things out can be very helpful in figuring out what's broken.
The usual first place to look is your power supply. They're the 3rd most likely part to blow up after hard disks and optical drives. HD and optical failures almost never result in no video though, which leads us to the PSU.
Does anything happen when you push the power button? Fans spin? Lights light up? If either of those things happen it's time to check your PSU voltages. You'll need a multimeter. You can get a perfectly workable one for $20 at say, Radio Shack. And no complaining about the $20. Everyone NEEDS a multimeter. They're somewhere between a screwdriver and a hammer in importance. (I use my multimeter more than my hammer)
Once you've got the multimeter, grab a power supply lead and stick the negative (black usually) probe into the ground pin (again, usually black... never seen one that wasn't) of the PSU lead. Then stick the other lead into the +12V and +5V connections (normally yellow for 12V and red for 5V). They should be close to 12V and 5V, but a bit off is ok. Now for the hard part- checking the 3.3V. I'm actually a bit fuzzy on whether or not SATA power plugs supply 3.3V, but the usualy way to check it is to prod the main power connector. Basically you have to carefully cram the probe into the connector until it makes contact. On every PSU I've seen, the 3.3V lines are orange.
If the power checks look ok, it's probably your CPU or mainboard since you've tried several video cards and tested the monitor on another system. Well, assuming you've got a PC speaker hooked up that is. Bad ram usually results in a beep code, but a dead CPU or mobo could easily result in nothing at all.
Does anything happen when you push the power button? Fans spin? Lights light up? If either of those things happen it's time to check your PSU voltages. You'll need a multimeter. You can get a perfectly workable one for $20 at say, Radio Shack. And no complaining about the $20. Everyone NEEDS a multimeter. They're somewhere between a screwdriver and a hammer in importance. (I use my multimeter more than my hammer)
Once you've got the multimeter, grab a power supply lead and stick the negative (black usually) probe into the ground pin (again, usually black... never seen one that wasn't) of the PSU lead. Then stick the other lead into the +12V and +5V connections (normally yellow for 12V and red for 5V). They should be close to 12V and 5V, but a bit off is ok. Now for the hard part- checking the 3.3V. I'm actually a bit fuzzy on whether or not SATA power plugs supply 3.3V, but the usualy way to check it is to prod the main power connector. Basically you have to carefully cram the probe into the connector until it makes contact. On every PSU I've seen, the 3.3V lines are orange.
If the power checks look ok, it's probably your CPU or mainboard since you've tried several video cards and tested the monitor on another system. Well, assuming you've got a PC speaker hooked up that is. Bad ram usually results in a beep code, but a dead CPU or mobo could easily result in nothing at all.