Solved No power supply in CPU

August 16, 2012 at 04:09:34
Specs: Windows XP, 1 GB RAM
Dear All,

Yesterday I switched on the power supply and pressed the power button of CPU, but power LED did not glow at all. I mean there was no indication of power supply in CPU. I interchanged monitor cable which was working with monitor and tried but no success.

Is an SMPS faulty? If yes, how to check whether an SMPS has become inoperative.

Are there any other faults?

Please guide me to resolve my problem.



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August 16, 2012 at 05:03:59
✔ Best Answer
"pressed the power button of CPU"

CPUs don't have buttons. Computer cases have buttons. A CPU is a chip that fits in a socket on the motherboard.

"Is an SMPS faulty? If yes, how to check whether an SMPS has become inoperative"

Being that you're calling a power supply unit (PSU) an SMPS, you're probably from India. And based on other posts from users from India, good quality power supplies are expensive so most people end up buying the cheap low quality brands such as iBall, VIP, & several others. If the fan on the PSU doesn't spin when you press the power button on the case, it's very possible the PSU is defective. The best way to test it would be to replace it with a "know to be good" unit.

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August 16, 2012 at 05:08:13
Please, lets get the terminology straight!!!
You computer's case is NOT your CPU. Your CPU is one component inside of your computer's case and is probably made by either Intel or AMD.

NOW on to the problem. I generally do not recommend using the power supply's manual power switch to turn off your computer, even if you wait for the system to shut off properly first. The manual rocker switch on the power supply is at best a 50 cent part (US) and apparently does not stand up to continuous use. If you are uncomfortable with the power in your town and prefer a manual power break, use a surge protecting power strip and turn that off instead. This way if the switch on it goes, you can replace the power strip or possibly replace its switch. Power supplies are not designed to be consumer serviceable and can contain power stored in them that can prove to be dangerous. Finally, being that you refer to the power supply as "SMPS" I infer that you are from India and know that India is known to have an overabundance of poor quality power supplies.
Replace the power supply but purchase a quality unit by a name brand like Corsair, XFX, OCZ, and a few others. For specific models to look for, look on, and filter with the following details: Single 12Volt Rail, Active PFC, 80% or greater certified efficiency, and look for a wattage rating the same or slightly higher than your original power supply.
This is a good economy model:

You have to be a little bit crazy to keep you from going insane.

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August 22, 2012 at 20:32:31
I just replaced an Switch Mode Power Supply (also known as Power Supply Unit) and I could operate my computer.

Power supply unit became defective.

Now my problem is solved.


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