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My computer wont power on. I replaced power supply a month ago due to erratic power shifts. My light on the motherboard comes on but the fan on the power suooly dosent nor does the internal comp fan.

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Please disconnect the hard drive and check it .If still not power on then SMPS is faulty get it repair or replaced.

Posted on Oct 06, 2010


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Posted on Jan 02, 2017


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My motherboard keeps on overheating @ 70C and over plz what must i do?

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If the overheating is not due to hardware issue, faulty components, you can control the temperature by using Heat sinks and Temperature controlling fans, and by regulating a proper Air flow to the unit. For this, you can also use Cooler Master casing specially designed for high end purposes, or can use any such available brand to control the temperature...

Jun 28, 2011 | ASUS P5KPL-AM SE Motherboard

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I have a msi 770-g45 motherboard, my computer suddenly just died. Now it wont power up anymore. The led indicators give a short blink and nothing more happens.

Usually a direct indication of a bad Power Supply. Weak voltage power rail, (Or more than one)

1) ALL of the LED lights on at once would use less than 1 Watt of power.
2) EACH fan uses 2 to 3 Watts of power.
3) A typical Processor can use 51 to 125 Watts of power. Depends on what Processor it is.

You have enough power to briefly light a few LED lights, and that's it.
Do you have a KNOWN to be good, Compatible power supply available to use for a test unit?
One you could perhaps borrow from a working computer?

Failed power supply, and computer is dirty inside, are the two leading causes of computer failure.
The Power Supply is cooled by air as are the components inside the computer.

The Power Supply uses Heatsinks inside, and an internal fan, for it's cooling components.

Example of the inside of a typical SMPS, (Switched-Mode Power Supply),

The cylindrical blue 'can' shown as B, is an Electrolytic Capacitor, (Radial Aluminum Electrolytic Capacitor)
To the immediate right of the blue capacitor is a Heatsink. Looks like a series of finned squares connected together.
There is another Heatsink to the right of the letter C.

{Basic construction of a Heatsink is a plate of metal with tall, thin fins protruding from it.
The plate of metal absorbs heat from whatever object it is placed against, and the tall, thin fins absorb heat from the plate.

The fins then radiate the heat away.
The fan draws air across the fins of the Heatsink, and the air flow helps to carry heat away}

When the fins of the Heatsink are clogged with dust, dirt, etc., and the Fan blades, center hub, and surrounding cage, {Shroud}, are also clogged, the cooling capacity drops tremendously.
This causes the components inside the Power Supply to overheat.

Heat = Wasted Energy

The Power Supply strains to keep up with the call for power, but due to the overheated condition cannot, and eventually components inside the Power Supply fail.

Opening a Power Supply, and trying to repair it is not a recommended suggestion.
Electrolytic Capacitors can hold a charge for weeks, months, sometimes over a year.
Without using the proper technique to drain the residual power from the capacitor/s, the charge can be released to YOU.
The shock can be Bad to Fatal ]

Best suggestion is to just replace the Power Supply.
For additional questions please post in a Comment.


Apr 03, 2011 | MSI 770G45 Motherboard

1 Answer

Have a solid amber light on top right of motherboard just replaced the psu due to the fact went through 3 power supplies with this unit and a dell tech installed all 3 plus a motherboard about 8 months...

Sounds like there is a major problem with that computer, if you have proof that dell has done all this work, and they agree it was not your fault, you probably have a good chance of a replacement computer.
I would think this is time to find some advice from a consumer advice orginization.
Just google Consumer protection advice or similar

Jul 14, 2010 | Dell DimensionTM XPS 710 PC Desktop

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Had my motherboard changed by local repair shop. Both fans are now running constantly & it is deafening, also power light no longer comes on and was told it was "no big deal". Have 2 like computers,...

Ok so what fans? the case fans? the cpu fan? The power supply fan should always run. The case fan can be wired to the mother board and do an speed step system (slow to fast) depending on heat, same with cpu fan. As for the power light its just an matter of pluging in the wire from frount panel to the mother board pins for pwrled. Asus has an download for your board to get the pin outs.

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The Tower has no power; I can't turn it back on.

When you press the power button does the power LED light turn on?
If it does not then it most likely the switch mode power supply is faulty and needs to be replaced.

Sep 16, 2009 | Acer Aspire X1200 Desktop PC - Athlon X2...

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Nothing shows up on monitor i dont have a fan in the back of the pc will that cause it not to boot up

Here's a link to an article that may help you to troubleshoot your situation.
If you have no fan, and no led lights, this could indicate either no power to the computer, or possibly a failed power supply. If the latter, you can have it load tested by a local computer tech to be sure it's gone bad, and replace it with a new one for around $25.00. That is on of the most common hardware failures in aging systems, so it's a likely place to check.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

May 15, 2009 | Gateway GT4022 PC Desktop

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Computer does not boot

If you computer over heated, this could have caused the board or power supply to short. I would first start by trying a new power supply unit (since this is cheapest of the options). If that does not work then try replacing the motherboard and/or processor. Since you not getting any power, my guess is motherboard or power supply unit.

Apr 20, 2009 | Intel Desktop Board D845PEBT2 Motherboard

1 Answer

Computer stopped responding ! Nothing appears.

Try replacing the Power Supply next.It sounds like it is on its way out.
Please let me know how this works for you.

Dec 18, 2007 | Gigabyte GA-8ID533 Motherboard

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