Question about Intel Desktop Board D845EPI Motherboard

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Tower won't turn on

I have a tower that won't turn on, no fans running but the led light turns on on the motherboard is it the power supply how do i test it

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  • anjelyc Mar 24, 2009

    The tower smelled like it was burning rubber, we turned it off and took the dust out. Turned it back on and the smell was still there, and it just shut off. I took everything off (USB & such) and plugged it back in - the light turns on then when u try to power on, it turns off. The fan in the tower turns over but does not continue to spin.

  • chelso555 Apr 23, 2009

    Yes I have the same problem as well... I have tried a new power switch and power supply and the only thing that I notice that has any sort of power would be the little green LED light next to the processor? Any suggestions this is a clients computer haha. trying to save some money here.

    Thanks


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If it's the type of power supply that has a 4 prong cable that goes into your motherboard, and you remove that, and the fans turn on, I'm afraid it's the motherboard has a short in it. If they don't, double-check that your cable is tight in the back of the power supply, where it goes from the wall into the power supply. Sometimes they will be loose, and won't work completely, but will have only one or 2 power lines connectd, so there is your power light.

Posted on Sep 12, 2009

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Not turn on


Unplug all power cables and check for bad connections. Reconnect all cables. Does the power supply fan rotate? Yes or No? Looking through the vented left side of the tower with the power cable plugged in do you see an LED lit? If no fan spinning in the power supply and no LED lit, then I suggest you change the power supply. Either do it yourself (very easy to do or have a tech shop do it for you - it's cheaper to do it yourself).

1. Un-plug all power cables.
2. Unscrew side panels.
3. Count how many of each type of power cable is required for on board devices.
4. Calculate power requirements by watts.
5. Purchase new power supply that has the cables you require and the required wattage to support your devices.
6. Unplug all power cables inside.
7. Plug in new power supply.
8. Plug in power cable first before turning on the computer. The green LED on the motherboard should come on. Congrats you have power.
9. Turn on the computer.
10. Enjoy!

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If it won't turn on at all (you see no lights and hear no fans or disk drive spinning) then the problem is either the Power Supply or the Motherboard. These guys are very economical at: http://www.generalsystemsconsulting.com Ship it to them and they will ship it back by Fedex or UPS

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I have an Asus M4A89TD Pro/USB3 Motherboard that I'm using to build a new PC. After I finished assembling the tower I turned it on and began setting my BIOS. I only set the date and time when my whole...


I would re-seat the power connector from the power supply to the motherboard. If you are able to test the power supply output, that would be helpful as well. The problem as you describe it points towards the power supply failing.

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Power supply failure. Replace it. Get 50+ more watts than the original. Power supplies are inexpensive and can be replaced without affecting your operating system or programs.
BTW: Many "failed" power supplies still can deliver enough power to spin fans and turn on the lights.
I recommend: www.newegg.com

If this helps please vote for my solution.

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detarch all accessories or hardware connected to the system , then bring out the power pack itself out completely look for a soldering led to test the functionality of the power pack itself if it rotates the fan of its pack by looping the first hole to the third hole cable in the power pack connector that will head into the motherboard. therefore, check the mother board if there is any damage on it like some component if all this is false . then plug the power pack to the outlet and fix the connector of the power pack to the motherboard after detaching both cd drive , floopy disk drive leaving the hard disk and the memory . then change the memory card and press on the system there should be a solution from all this . the problem should be from the Memory not to be able to start up the system but go through those process i have given you before concluding it was the memory ok....


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Installed Crosshair MB in new case. Motherboard LED lights come on but CPU and fan do not light up or turn on. Tried dif power supplies and cases, no luck.


Make sure that the motherboard LED switch on the back panel is set to off and if want to turn it on go into bios and set it. If it is active thru switch and not thru motherboard bios it will not allow you to turn on PC cause it is in maintenance mode.

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My computor screen is black pc tower has green light on abut no fans are running what has gone wrong . i took caseing off and cleaned all dust but plugged back in and no fans


The first thing I would check is the power supply. It sounds like it has just enough power to turn on some lights, but not enough to power up fans, motherboard, CPU, etc. So either test the Power supply, or just purchase a new one. They are pretty cheap these days.

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1 Answer

Doesn't start. Green LED off. Red light permanently lighted.


First, try replacing the power supply. If this does not work then the motherboard will need to be replaced.

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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...)

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