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New computer will not power up

I just built a computer for the first time - purchasing all the components in a package, so everything should be compatible.  All connections have been double and triple checked.  When I turn on the power, the system fan and the CPU cooling fan come on, but nothing happens beyond that.  I have a DVD drive, but it will not open as if it is not getting any power.  It appears that only minimal power is getting in.


Any ideas what I can check?

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Re: New computer will not power up

Hi did you get that problem fixed cause i have the very same problem

Posted on Dec 06, 2007

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Re: New computer will not power up

It could be a number of things, but one thing sometimes gets missed out, the fan has come on so the fan is connected, but some processors are no longer powered by the ZIF socket and are powered by a seperate 4 pin plug from the PSU to the motherboard, so check that first.


Check the memory for compatability with your board, remove one if you have 2 fitted and try again, especially if theres no beeps indicating that the memory has not been identified; if theres no bios and just a flashing cursor, then the bios chip may have been damaged or stressed on build when fitting the parts caused by overflexing the motherboard or faulty from supply.


Clear the cmos terminals (refer to the manual) just incase after you have refitted the memory

Posted on Oct 23, 2007

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SOURCE: New motherboard will not boot

It appears that you are aware of Motherboard jumpers.

1. Reset BIOS settings by CMOS Clear jumper ( Location of jumber is given on the sticker / manual of motherboard )

2. Try updating BIOS of your motherboard from the following link :

3. Plug only Optical Driver / Hard disk at a time and check.

4. Contact your vendor and get the motherboard replaced.

Posted on Feb 12, 2008

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SOURCE: Followup on power connectors

Hi chweb1230, to answer you're question. Yes, I would suggest getting a power supply that would comply with the ATX main 24-pin power connector. The term backwards compatible references to boards that require less voltage, Ex; (A 20-pin main power board). If you intend to run serial ATA SATA drives & a PCI-E graphic card. The newer power supply will handle future upgrades. Suggest a 500 to 550W PSU should handle just about anything you add to the board.
chweb1230, when you make a post & are making reference from another post. Please copy & past that link into this post. If you are using a new user ID I can not look back & find what you are refering too.
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Posted on May 19, 2008

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SOURCE: get no power with intel d875pbz in rosewill tu155 case

You don't have the power switch connected where it belongs. There's one set of pins where all the front panel connections go. This information is from the manual for this board, available from Intel here.

Hope it helps. Thanks for using Fixya!


Posted on Feb 12, 2010

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My husband recently built a new computer (previously built 5 others successfully). Motherboard seems to be working properly. Green LED lit. Graphics card works in another computer. Power supply...

Hi, the thing to do here is to narrow down what could be causing the problem, initial suspects would be the RAM chips. If you have known working ones you can try in it, try these, if not, try without one, then swap them over, or even try without both.

Also, remove any components that aren't strictly necessary, i.e. hard drives & cables, cd-rom/dvd drives, extra PCI cards,network cards etc

Another suspect may be just a loose connection, try taking everything out, re-seating it. Again, pay particular attention to the RAM chips.

It could possibly even be a faulty processor, have you another you could try? Try taking it out and re-seating it.

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I just built a system with a gigabyte ga-ma785gm-us2h mb with an athlon2-x4640 processor. it does not post. keyboard, fans and hd power up,but no display or beeps. tried clearing cmos but no change. ...

hello ddkkdd

my name is ausi. i just saw your issue with the motherboard. if you have not solved the problem yet then do the following

1- your motherboard does not have a built in speaker. make sure you have one connected in case there is beep. short rapid beeps are memory problem and longer ones the video card.

2- after you turn the computer on press the power button in front the case again (couple of seconds only). if the computer does not power off then most likely problem is the main board.

alternately if you purchased the lot from the same place take only the motherboard and processor back to them (assembled) and ask them to power it up for you.

good luck

Jan 09, 2011 | Intel Motherboard

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I cleaned my motherboard (MS6577 ver4) by using a vacuum hose to **** out my VERY dusty my machine! However, after plugging back everything, it won't power on. I don't know why it wouldn't turn on since...

Assuming you didn't get the vacuum hose down by the board and accidentally break off or bend one of the components....
I have done the same thing before and the vacuum gets the easy dust that you can see however sometimes it will move the dust but not completely **** it up and it will cause a short on the motherboard. Best thing to do after using the vacuum is to get either a can of air or an air compressor of some kind to get the last bit of dust out that you can't see)

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Not powering on at all - I have been built a new computer from scratch with all brand new components. After hooking all of them up and plugging in the power source. Nothing is happening when the power...

1. Could be as simple as not having the Power Switch on the right jumper...double check.
2. The board will power up with nothing hooked to it... just power, CPU, MEM... disconect everything to just to get the board up to the bios.
3. Make sure PS is securly connected to the MB.
4. Check Jumper on the Board to make sure the Test Jumpers are not set
5. Memory is seated correctly... if you pull them out the board will start and beep...

Dec 31, 2009 | Gigabyte GA-G41M-ES2L Motherboard

1 Answer

My computer restarts frequently. Some times after

Maybe it is a heating problem. Try putting a new thermal paste on your CPU and cleaning fans. (there is still a possibility that it is a power supply component problem.
So you should consider buying an UPS.)
Also check capacitors, if they are deformed - replace them or buy new MB.
Good luck! :)

Nov 28, 2009 | Intel D865GBF Motherboard

1 Answer

Iam interested in up-grading to a new mother board, and or wondering about what parts would be compatible to do so!

This depends upon how old the desktop computer is, if is more than say 5 years old then the power supply may not have the the right ATX power connector for the new motherboard (ATX2 has 24 pins, ATX has 20 pins). I would get a new hard drive they do fail with age.
You could reuse the CD/DVD drive, plus the graphic card, and sound card if it is not part of the motherboard, also the monitor, keyboard, mouse (but these are low cost items)
Basically by the time you strip everything out of the case and put in new components, you would be better getting a new computer.
Then remove your data from the hard drive and sell the computer or network it to your new computer and use it as a backup file server.

Nov 08, 2009 | Gigabyte GA-8I865GME-775-RH Motherboard

1 Answer

Computer is dead

Most of the time it's power supply failure.

1.A lot of computer owners fail to clean the inside of their computer, plus the power supply out, on a regular basis. I find this occurrence at my shop quite a lot.
Unplugging the computer from power, observing anti-static guidelines, and using a can of compressed air for computers would have prevented this.

Power supply's have a fan for cooling, as well as heatsink's inside. When these components collect dirt, dust, hair, and other foreign objects, the cooling capacity drops tremendously.
Heat = Wasted Energy
The power supply struggles to keep up with the demand of power needed, and eventually components inside it fail.

2.Most power supply's installed in a pre-built computer, are of a low grade of quality. (MOST. Generally pre-built computers manufactured in the last two years, have upgraded the quality of their power supply's, but not all of them)

Saves the computer manufacturer money. These power supply's have low quality components. Gauge of wire used is smaller than it should be, Electrolytic Capacitors are of an inferior grade, transformers are cheaply made, and the rectifier bridge is cheaply constructed, are a few examples.

3.Computers that are built by the owner, and are not pre-built, may have a cheap, or underrated power supply installed. You really have to check out reviews for power supply's on the internet, to see what quality it has. However there are some websites, that 'pump up' the review to stay in good standing with the power supply manufacturer. Generally, if the power supply price is cheap, so is the quality.

There are two other things to look at.
It may be the Power On switch that is behind the Power On button. These can go out.

It could be the motherboard. Most of the time it is Electrolytic Capacitors that are the 'weakest link'. Specifically the one's that surround the processor. These 'Caps' are Voltage Regulators for the processor. If even One is bad, the processor will not work.
No processor, No computer.

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How to know if there are bad Electrolytic Capacitors on the motherboard?
This website has information, plus photos of bad capacitors,

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