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Power failure I find my pc powering down just when it turned on.

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Re: power failure - Ultra (ULT31586) ATX Mini-Tower Case Computer Cases

Your power pack is bad.replace it.

Posted on Apr 12, 2007

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My pc is shutting down and I can't wake it up without shutting down the power from power supply. The Antec 300 tower has two blue lights- the top light starts blinking when it has shut down and I

sounds like a power supply problem

Test your PSU power supply unit or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle of restarting or to shutdown or fail to detect/ boot up a computer hard drive

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

hope this helps

Oct 13, 2012 | Antec Computer Cases

1 Answer

My pc automatically get start on plug on .and then it suggest me to press F1 to Continue. when I do this it takes incorrect date and time how to restrict it.I want to start it with start button on cabinet

There can be many reasons...
  • Your BIOS setting is not correct.
  • CMOS battery is down(Most probably).
  • both
You can open the BIOS setting page by pressing keys like DEL, F10, etc. depending on your system's manufacturer at computer startup(post screen). There are lots of wakeup options check them properly.
One of the option is "Restore last state of power Button on failure" which can turn on your computer without touching the power button. you should check these options.

And it suggest you to press F1 because your system's date/time is not configured properly. You can also set Time/date in BIOS also.
If your BIOS Battery(CMOS) is not weak or dead then after setting these values your computer should start properly.
And if your BIOS battery is dead then all the settings will be lost(date/time etc) after a restart and you will face same problem again...

Try changing the Power-button option and Date/Time in BIOS and see if problem persist....if yes then you have to change COMS battery that is on your Motherboard.

Sep 22, 2010 | Computer Cases

1 Answer

I can't get the screen to turn on.

If you see something during reboot it's probably a video driver issue. Hold down power key till the pc shuts off, turn back on, keep pressing F8 till you get a boot menu. Pick Safe Mode. Once back into the desktop, see if you can either rollback your system or update your driver.

Mar 31, 2009 | Sony Computer Cases

1 Answer

I installed mostly everything but it turns on for 2 second and shuts down i think i shortaged something out

First Thing I would try is another power supply, this is the easiest and most major cause of pc power problems. Also you can usually take your pc to big name computer stores they will diagnose this issue for free so they can get you to spend tons of money having them put in one. but I would definitely do this first., It is not unusal for a power supply to be DOA

Dec 02, 2008 | NZXT NEMESIS ATX Mid-Tower Case

2 Answers

Power supply lighting up but when I push the ''On'' button there is

Most if not all pc power supply’s have a short circuit protection feature that will not allow themselves to turn on if there is any type of short in the system

Example being : one day on my pc here one of the extra power plugs for the cd rom drives (the ones that are there for adding more drives with red,2blk,and ylw wires) was hanging down in the back of the case out of view and some how managed to make a perfect connection with one of the positive wires and a little notch on the metal case resulting in pc not turning on.

Also i have seen some rare times where a screw that was lose in the case had fallen between the motherboard and the metal panel that the board is mounted to causing a short which prevented the computer from turning on.

If you have gonna as far as changing power supply’s then you might as well remove the whole board and then putting it back in but only connecting the power supply first to see if it turns on with just the board and the power button connected and if it does then install each component one at a time testing it in between until it stops working again to be able to tell which device it is.

if it does not turn on with just the power supply and the board by it self then check the capacitors on the board usually the ones closest t o the CPU to see if any of the tops of them look like they are popped up (they should be perfectly flat on top and the lines perfect and if one of them are even the slightest bit rounded on top like they swelled up a little then the board is history...Hopefully this is not the case and to make this easier for you here is a pic I uploaded to my website for you so you can see the difference

Nov 15, 2008 | A-Top XBlade Mid-Tower Case

2 Answers

Power but doesnt start

Sounds like you are not getting a "power good" signal from the mobo telling the power supply to turn on. Something is probably wrong with the configuration or installation of parts. Try removing the RAM and all interface connectors and then see if will power up.
Make sure the power supply is set to the correct A/C voltage for your reigon.
Could be the motherboard is cmoing into contact with the chassis or something else.
Make sure the processor is inserted correctly and seated.

If it powers up. begin connecting the RAM and try again. Keep connecting something else one at a time until it fails. That will be the problem.

Nov 07, 2007 | Arctic Cooling Silentium T2 ATX Full Tower...

2 Answers

Flashing Lights when powered down

The flashing LED is because your system is in "sleep" mode. By default windows Vista puts your computer in sleep. What this means is it doesn't shutdown the power completely it leaves a little going through certain computer components (more specifically the ram) to speed up the boot time when the power button is pressed again.

In XP a the default shutdown scheme is a complete shutdown where power is turned off after the shutdown process is done. If you are using XP you are putting your computer to sleep when shutting down.

As for the boot problem. Newer motherboards have an LED on the actual board to indicate that it is receiving power. If it is of either the power supply switch (at the back of the case) if off or the motherboard connection is loose and the shaking makes it fall into place. (Shaking is usually not necessary and indicates a problem...)

There are a few possibilities I can deduct from your description:
  • the connection from your power supply to your motherboard isn't properly seated and is causing this
  • the power supply switch (not the case switch) is being  turned off and results in the computer taking a few seconds before the internal LED become solid
  • ... the dreaded sign that the power supply is failing and is on it's last legs...
My suggestion is to check all connections and if that doesn't work borrow a power supply from a friend and swap them to see if it boots properly.

(If a friends with a spare power supply isn't an option a local PC repair shop should be able to help you out... but probably for a fee...)

Oct 28, 2007 | Computer Cases

1 Answer

Power failure

This is a power supply issue. Try borrowing a power supply to test first. Then buy a new one and replace.

Apr 12, 2007 | Ultra (ULT31586) ATX Mini-Tower Case

4 Answers

Continuation to 'help no power' question?

It's not a short in that sense. It's just preventing thee motherboard from starting. I had the same issue a long time ago when building a pc. Once it's seated properly, it should turn on...unless like I said previously, there is something wrong with motherboard all together.

Oct 05, 2006 | A-Top Alien Gaming ATX Case

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