Question about Dell (8N816) Motherboard

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The light on my hard drive is yellow rather than green and my computer will not turn on.

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My Dell tower turns on with the power button's light as yellow . The fan runs then, after a couple minutes, Stops.

Posted on Jul 29, 2012

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Ordinarily yellow light indicates ACPI standby. On some Dell and HP motherboards the same light also indicates a CPU failure, usually due to overvoltage or overheating.

Turn the PC completely off (unplug from the wall socket). Open the side, so you can see the motherboard with CPU and heat block. Best if you wait some ten-twenty minutes. Plug the power cable and power on the PC. Does it turn on, and does the CPU fan rotate correctly? If the PC turns on, and the fan doesn't, you have a busted fan which needs replacing.

If this doesn't solve the issue, describe exactly how the error happened. Is it a new PC, a PC which already worked and stopped doing so, a DIY assembled machine? Does it never turn on, or does it sometime do?

Posted on Aug 20, 2010

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1 Answer

The hard drive does not "power up". The green


I'm assuming this is a USB external drive. It's likely that the drive is failing, but to find that out for sure you'll need to remove the actual hard drive from the housing, insert it in a computer as a slave drive, and run a diskchk on it to see if it's responding correctly. If that test is successful (ie., it tests OK and you can access the drive as a slave in another computer) then it's just the USB interface on the housing that's bad. You can always just get another housing (they're inexpensive and lots of them).

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2 Answers

Computer will not turn on


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    Indicates system has power, but the POWER_GOOD signal is not yet active.
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If you have replaced the memory on a computer and it does not turn on normally that means that either the memory is defective or it is not compatible. Do you hear beeps when you turn on the computer?

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sounds like something is drawing down on your 12 volt supply drives or on board regulators. Try it without the drives connectged, and see if you can get the system to boot up(you'll just get a notice that your drives are unavailable, but you'll already know that, right?

got backup for your Dell?

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1 Answer

Yellow light?


Tre, save early, save often, save many. I have seen, heard and experienced external hard drives failing. It is a good habit to use the "usb device safe removal tool" the green arrow on the task bar. When the device is safely removed, turn it off. When you need the drive again...turn it on save files, safely remove device, turn it off. Sometimes the turning on and off of the computer with the drive hooked up can cause issues over time. Anyway hope that helps. Good Luck. Tim

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