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Compaq desktop cq5107c yellow light stays on when started and fan starts for sec then stops. Keep trying to start by pushing on of button but yellow light stays on with blue power on, normally yellow only on when processing. PC will not start. HELP!

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  • Contributor
  • 19 Answers

Hi, Could be several Things, But Sounds like a Power supply Problem. But TRy this:

Posted on Nov 17, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

kornho
  • 781 Answers

SOURCE: Orange Light permanently on motherboard. PC won't start

1. motherboards for atx form factor pc's are powered even when the computer is off, particularly if you leave the computer plugged in to wall outlet... you better do not work on you computer while power cable is still connected to both, your pc and the wall outlet..

2. I found this thread that may be helpful, it may be the motherboard may have gone bad, cmos is corrupted or something may not be seated properly...it could also be one of these: Bad CPU, BAD ram, Bad power supply.. read the thread for details:
http://www.dellcommunity.com/supportforums/board/message?board.id=oplex_other&message.id=23925&c=us&l=en&cs=&s=gen

Posted on Sep 25, 2008

deathraider
  • 64 Answers

SOURCE: gateway 505GR desktop...failure to start

when the power supply goes bad , that is the sign that it needs to be replaced . I would replace it first .

Posted on Mar 12, 2009

  • 4 Answers

SOURCE: resons why the hp DC5100 desktop will not start up

The first you need to do is remove the power cable to your Motherboard and back it again. If doesn't work , replace power supply, still not, replace motherboard

Posted on Jul 17, 2009

tbirdfan1
  • 3051 Answers

SOURCE: Emachine T6426 PC..I push power button and fans

Hello there:
If all of the fans come on, check to see if the fan is blowing on the power supply if it is not than you are going to have to replace the power supply. please keep me informed cause there is more that we can do if needed ok.
best regards mike

Posted on Aug 03, 2009

bob_computer
  • 3153 Answers

SOURCE: Compaq: CPU fan has failed PC will automatically power down

Your fan speeds up and slows down in response to temperature inside the computer. More so the CPU.

I would suggest getting a can of compressed air made for computers

take it outside, take of the side and blow all the gunk out of there, Really go to town around the fan (you might want to wear eye protection)
While you are in there just check that the CPU cooler itself is not loose

If it is it will have to be re-seated.

If it needs re-seating don't just take it off and put it back on as that might make things worse with your temperature problem they have to be cleaned and new thermal grease put on ($2-5)

DON'T remove the CPU just the fan/cooler assembly.

You must clean both the surfaces without scraping anything off. Use isopropynol alcohol and cotton bud sticks until both surfaces are clean, you can use your finger nail to scrape harder residue if you wish but nothing else.

DON'T pour the alcohol over the CPU

Now apply some new thermal grease (most computer shops have it)

Be careful about how much you put on

Here are
some basic instructions


Once you have re-assembled your cooler and re-connected it check everything is OK and power up the computer.

If everything went to plan you should now be back in business
 
Hope this gives you the information you need

Bob
Moderator

It would be very decent of you to consider the quality of our experts answers and judge them accordingly as you pass through fixYa.
Thank you

Posted on Nov 27, 2009

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