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Posted on Mar 14, 2009

Computer wont turn on or boot

Ok...something wierd is happening with my computer
i few days back i started building my own computer with a:

ECS elitegroup GF7100PVT-M3 motherboard
a Pentium 4 521 LGA775 800 MHz Processor and Foxconn Fan/heatsink
a nVidia GeForce 8400 GS video card
2 Kingston 1024MB PC5400 DDR2 667MHz Memory modules
a 120 GB Seagate Hard Drive
and a Power Up ATX Mid-T case with a 450w PSU

Sometimes the computer wont turn on at all, or sometimes you have to physically lift the fan (put pressure on it so it goes up maybe 1 mm) so it will work. Sometimes the PSU works fine, but sometimes im not so sure about if its working or not. I think i blew out the CPU_FAN connector on the motherboard so right now im using the SYS_FAN connector. If you want the fan to start, you have to lift the wire that goes to SYS_FAN a bit so the fan can turn on. Lately, nothings been working at all...

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  • Contributor 34 Answers
  • Posted on Mar 14, 2009
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Joined: Mar 14, 2009
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What size power supply are you using, if its under 400 watts it may just be under powered. Large video cards 512mb and over take a lot of power. Try removing the video card and see if you can get the pc to power up, hopefully you have on board video.

How did you blow the cpu_fan connector, did you short it out? I would first supect the power supply is under rated, second a blown power supply, or mother board.

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No display when starting after installing in new machine. I bought TWO ECS MCP61M-M3 motherboards for my kids for Christmas and have the same problem with BOTH. This is in a completely new computer build....

First thing I would do is try using the monitor on another working computer to see if it works. If so, you have eliminated that as an issue.

Kind of hard to fathom that you got two fubar mo bo's but as they stay in the street, sh-- happens. However, The lack of a beep means that the bios is not posting. When you turn on a computer, the bios does a check of internal components and environment - if all is ok, it beeps and then has the hard drive install the operating system into the computer's memory. And if something is wrong, the bios will usually give out certain beeps that are coded such as when you have bad memory, no memory, etc. But you are getting zippo, and no video at all on your monitor - this is one of the few times you wish you had the blue screen of ***** because with that at least you know your hardware is ok but your software has an issue.
The conditions you have reported would seem to indicate that the bios chips on both units are corrupted and not working. U might also make sure that the memory chips are good. A bad chip, not a missing chip, will sometimes prevent the mo bo from booting up.

If you also remove all the memory and turn on the witch, if the bios is working it will beep like crazy. If nada, bios is dead.

If boards are new as you indicate I would return for exchange.
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To change your VM settings follow these steps:
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Beeps 2 times & a warbling noise when trying to boot up - unplugging power lead & pressing ON/Off button & reconnecting power lead starts up OK - but it can be OK for several days & then repeats the p

The Cause of Problem:

The Power Buttons electrical circle sometimes just braked it by one of sensors and the result is the 2 beeps and Power Supply is in protected mode error.

The whole computer is turn off but the power button is turn on and this is the nub of the matter. Because if you want turn on the computer you can't because already turn on but just the Power button and you can't do anything.

The solution:
You need just change the Power Supply and don't do anything just the power cable put into the Power Supply after turn off computer.
Finaly change back the Power Supply.
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