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Power Supply Failure?

O

orbitingaround

Junior Member
Hi, this may be a dumb question, but I just wanted to make sure that it is my power supply which is broken before I order a new one. Basically, the computer will not turn on, even though everything is connected properly, and when I press the power button, absolutely nothing happens. I have a 300 Watt Enlight power supply, which I got as part of the case last September, which never gave me problems with intermittent freezes/shutdowns previously, so is my power supply really gone for good?

If so, what could have caused my power supply failure? Right now I'm planning on ordering one of the Antec True Power's because they seem to be the most efficient/reliable power supplies.
Thanks.
 
You might want to do the screw driver trick to make sure its not the power switch. Although I really doubt it is.

Also I am guessing you don't have another PSU to check it with.
 
Keep in mind that some OEMs (dell, gateway etc.) use non-standard power supplies. If you are attempting to connect a standard off the shelf power supply to an OEM mother board, it wont work, the wires are different, even though it will plug in.


If this isn't the case, the power supply is fried.

Good luck
 
Well I figured that since he said that its an enlight power supply and that he bought the case him self, it is not a manufactured PSU.

Also I am thinking they make adapters for them. If they don't they really should. I mean I haven't looked at the PSU's spec sheet to see what power you get but I would figure you get all the same voltages and such. Just need to move them back around. That would save alot of people alot of money.
 
Make sure you have AC power at the outlet you intend to use. Plug a lamp or something into the exact outlet you were using. And that your power cable is plugged in firmly at both ends. Oh yeah, many PSUs have power switches on the back - make sure it's not in the off position (usually 0=off 1=on).

Here are other common reasons for failure to power up.

Boilerplate-01:
. Most frequent causes of failure to boot:
1- RAM, CPU or AGP video card not seated properly, or a bent pin.
2- Drive data cable on upside down or only on half the pins or shifted . a pin or two (usu Floppy or Zip drives).
3- CMOS needs to be cleared (AC power must usually be disconnected or . attempt to clear CMOS may fail) Unless your mobo does not use a power-off CMOS clear - check your mobo manual for specific info.
4- Many new mobos (particularly for Athlon) require a fan to be connected on the fan connector specified for the CPU (it's marked CPU-FAN). That the fan has a tach sensor wire and that it is spinning at a certain min. speed or the board won't power up fully.
.bh.
😎
 
Originally posted by: Zepper
Make sure you have AC power at the outlet you intend to use. Plug a lamp or something into the exact outlet you were using. And that your power cable is plugged in firmly at both ends. Oh yeah, many PSUs have power switches on the back - make sure it's not in the off position (usually 0=off 1=on).

Here are other common reasons for failure to power up.

Boilerplate-01:
. Most frequent causes of failure to boot:
1- RAM, CPU or AGP video card not seated properly, or a bent pin.
2- Drive data cable on upside down or only on half the pins or shifted . a pin or two (usu Floppy or Zip drives).
3- CMOS needs to be cleared (AC power must usually be disconnected or . attempt to clear CMOS may fail) Unless your mobo does not use a power-off CMOS clear - check your mobo manual for specific info.
4- Many new mobos (particularly for Athlon) require a fan to be connected on the fan connector specified for the CPU (it's marked CPU-FAN). That the fan has a tach sensor wire and that it is spinning at a certain min. speed or the board won't power up fully.
.bh.
😎
Click to expand...

Well even if the RAM, CPU or AGP video card is not seated properly the the hd should still spin up.
If the data cable to the zip or floppy was backwards it would still get to the BIOS
If a fan was required it would startup and shut down.

But I agree clear the BIOS.

 
Thanks everyone for your input. My case does not have an on or off switch for the power supply on the back, and I know for sure that my surge protector is fully-functional, because I've tried switching the power supply cord to a different outlet, and still the computer will not turn on. I also double-checked the connections w/everything including the monitor and speakers, and those are fine.

It was just a matter of turning on the computer one morning, and coming back later in the day to find that it wouldn't turn on anymore. I guess I might try clearing the CMOS as was suggested in a similar thread, and hope for the best.
 
It may be that the fuse in your PSU blew for some reason. In the old days you could easily change the PSU fuse as it was in an external holder, now you would have to open the PSU case and void the "warranty". Hey, I just remembered, the Sparkle PSU I just got from Newegg doesn't have any seals on it...
. I have fixed many a PSU that way. The fuses they use in there are pretty cheap and many are marginal to begin with.
.bh.
😎
 
Okay, an update on this because the problem still isn't fixed. I have tried changing the power supply/power cord/outlet, and the same problem occurs. I double checked the power switch and reset connections to the motherboard, and those seem to be fine, even switching them to try and use the reset button for the power button. My mouse and keyboard seem to have power because they light up when I connect the power supply, but the computer itself still does not turn on.
 
Check the 115/230 switch on the back. Make sure it's set for 115. If that doesn't help, it's a motherboard problem.
 
Also, since this is an Enlight case, make sure that the bezel is fully snapped on. If the bezel is askew, you push the button on the bezel but it doesn't reach the actual switch. If in doubt, try momentarily connecting the mobo's Power Button pins with a screwdriver tip, as previously suggested, to simulate the momentary contact of the case's power button switch.
 
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