Question about Dell Dimension C521 PC Desktop

1 Answer

Dell Dimension C521 power shuts off spontaneously seems the fan on the power supply isn't working.

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Dell Master
  • 1,684 Answers


If the fan on your power supply is not turning then you need to replace the power supply as soon as possible. The machine is overheating and then shutting off. If the power supply is not replaced it can cause additional problems with the motherboard, cpu, and hard drive. Open your case and look on the power supply for your replacement parts number, check for a replacement. They are easy to replace, just a few screws and power plugs.

I hope this helps, if so please rate my solution.

Corporate Computer
Over 21 years of PC and printer support/repair

Posted on Jun 28, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Dell c521 won't start blinks amber

A possible power supply failure has occurred. The system has not received a Power Good signal from the power supply. In other words you either have a defective power supply or a device in the computer (i.e. sound or video card) is shorting out the power supply.

Mar 15, 2013 | Dell Dimension C521 PC Desktop

1 Answer

Do not want to start, yellow light on and fan on only.

At a glance it seems that your MOBO is bad.But also can be the power supply.

If you need more help post back!
Thumbs and testimonial are welcome!

Jul 21, 2011 | Dell Dimension C521 PC Desktop

1 Answer

My dell dimension c521 does not boot and shows a amber light. This happen after I cleaned it to change the processor.

2 reasons, one the cpu isn't supported by the board or the power supply isn't great enough. I'd go for option 1.

Apr 07, 2011 | Dell Dimension C521 PC Desktop

1 Answer

Can you get a bigger psu for dell dimension c521 that will fit inside the case

Hello aprilmick

I think you can.
the case dimension for your dell PC is H: 15.8" (40.13 cm) W: 4.5" (11.43 cm) ---> the standard power supplies have a width of less than 10cm.
D: 14.2" (36.07 cm) ---> the standard power supplies have a debth of almost 15cm.

Considering these measurments you can use a standard power supply of whatever rating you want. It may be a little too tight between the power supply and the CD/DVD drive, but it is possible.

Good luck

If you find this helpful please leave comment, vote.

Feb 15, 2011 | Dell Dimension C521 PC Desktop

1 Answer

My c521 powers up and shuts down immediately after. You get about 3 seconds of activity from the fan and LEDs. Nothing appears on the screen.

sounds like a power supply is gone bad. if you can replace it and usually it is simple u can get them cheap on tiger direct. some stores sell pwr supply testers so can try that too.

Dec 10, 2009 | Dell Dimension C521 PC Desktop

1 Answer

Dell C521 Power Issue

I would replace the power supply and if that does not help (after battery replacement and power supply), the ram could be faulty but usually faulty ram will beep a code. If ram has no avail i would suspect the mainboard and replace. Good Luck

Nov 24, 2009 | Dell Dimension C521 PC Desktop

1 Answer

Do you have simple direction sto replace a power supply for a Dell C521 Dimension? I am 62 years old, but I have replaced modems and added memory, so I think I can tackle this with good directions. THANKS

You may want to refer to this link for step-by-step guide to replace power supply specifically for Dell C521 Dimension, which I got from Dell Support site.

Oct 23, 2009 | Dell Dimension C521 PC Desktop

2 Answers

Dell Dimension C521 power shuts off spontaneously

Procssor over heat can cause this kind of problem
check your processor cooler

Feb 22, 2009 | Dell Dimension 3000® Pentium® 4...

Not finding what you are looking for?
Dell Dimension C521 PC Desktop Logo

958 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dell Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18425 Answers

Alun Cox

Level 3 Expert

2678 Answers

mukhtar21 shaikh
mukhtar21 shaikh

Level 3 Expert

2022 Answers

Are you a Dell Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides