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Power issues on a desktop PC.

On turning on my PC, it turns off in 1 sec. It repeatedly does this when trying to turn it back on. At times the system turns on however theres no display. At at times the system works fine. At times it hangs on BIOS, at times on windows. Does any1 know what the fault can be. I'll be grateful.

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  • SD Tech
    SD Tech Nov 08, 2012

    is it possible that when unit does come on after several tries and stays on it will work until you turn off and it cools and then the issue starts all over?

  • joecoolvette
    joecoolvette Nov 08, 2012

    I would like you to look at the Radial Aluminum Electrolytic Capacitors on the motherboard,http://capacitorlab.com/visible-failures... unplugged from power, Anti-Static Precautions -> FOLLOWED. You may have to use a flashlight, and you MAY have to remove the motherboard, to get an accurate diagnosis. Post back in a Comment.

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  • 27,725 Answers

If the PSU power supply units fan is not working the PSU is faulty

http://pcsupport.about.com/od/toolsofthetrade/f/powersupplytest.htm


Test all power and data leads that attach to your hard drive IDE,SATA
the leads from your MOTHERBOARD TO YOUR HARD DRIVE make sure they have secure dust free connections and are not faulty or just replace them they could be faulty

motherboard and a hard drive any leads between them will fail before your motherboard or your hard drive if its a flat ribbon 40 pin type IDE replace it this will be the first to fail


make sure all leads that are attached to your drives dvd\cd floppy have secure dust free connections and are not faulty or just replace them they could be faulty a computer needs



power and data to travel through every working device and to continue its cycle and have an end so any faulty leads will end up with a computer error



even something as small as a faulty power lead or fan lead can cause you problems

computers need all of the data and electrical current to travel through every working device and to have an end to be able work properly



make sure ram modules and cmos batteries have dust free secure seatings and cmos battery has charge some motherboards cmos batteries are soldered in



you might not have enough computer ram

not having enough computer ram will run your computer over its limits putting to much strain on the CPU central processing unit and can cause memory dumps



you might have to many programs trying to or accessing the internet at the same time
scroll to bottom toolbar (bottom of screen) right click select task manager

applications you will see whats running
if you see anything you dont need running select end now and you might uninstall that specific

program if you or computer does not require it to run and
some unnecessary programs that could be jamming up your computer

also under processes see what is ticking over in the background again if you see something you
dont need to be and users you will see who is using your computer

you might need to add more computer ram
if you're not sure if a module is right for your system use the

Crucial Memory Advisor tool for a list of guaranteed compatible modules. first you will need to select the manufacturer from a drop down list then select your product line

from a drop down list then select the model then click find it will take you directly to compatible ram also you will have an option to scan your system
you should always ask for a guarantee on the compatibility of the ram before making any purchase



might be getting hot

check you CPU make sure its securely seated and has thermal grease

http://www.hardwaresecrets.com/article/Thermal-Compound-Roundup-February-2012/1490


hope this helps

Posted on Nov 09, 2012

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SOURCE: A display problem in my Acer desktop pc

techguru 2009: First thing disconnect all power. Remove all drives (hard drive, CD/DVD, Floppy). Then remove all PCI cards. Also slowly remove the Memory cards. You should only have the motherboard w/processor and the power supply connected, do not connect the monitor or mouse\keyboard. If you have a CMOS battery also remove it. Careful turn the power on, you should hear several beeps. That is letting you know that there is no memory installed. Turn power off disconnect power cord. Slowly install the memory cards, keyboard, mouse, monitor. If you have a pci video card install it now. Turn power on. you should see the bios loading then error message there is no disk or operating syste. turn power off and start connecting one device at a time so your bios can recognize it. This should let you know if you have faulty hardwareby isolating each install. If you still have problems let me know.

Posted on Feb 24, 2009

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SOURCE: gateway gt5648e desktop power

I had temporarily solved this problem on my PC. After much research I've learned that Gateway shipped these PC's with faulty bios. What you will notice is that your machine will "loud fan reboot" every hour like clock work. Either clock in manually or use your system tools to see the exact reboots and manually reboot a minute before it shuts itself down. This has worked for myself and many others on various boards if you google the problem.

Weird? Yes!! But it worked !!! 2 months reboot free.

Posted on May 05, 2009

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