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When I turn on my tower. It powers up, but not enough to get any information to my monitor or keyboard. The green light stays on, but it is not really running.

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As you would expect, there are several possible causes for this.

I assume you are DIY'ing a computer and you are sure all the components are defect-free (otherwise, all bets are off!).

The likeliest reasons for not booting like this are: the memory isn't installed correctly (but you should hear some kind of beeping error code, unless the internal speaker is disconnected or misconnected), the CPU isn't installed correctly, and maybe there is some kind of wiring problem. For example, if the RESET hardware button is shorted - which happened to me once, I had connected the RESET wires to the wrong jumper plug, of all things - the computer will give you exactly the symptoms you are having (the same you get if you keep the RESET button pressed by hand, of course).

So, check the wiring connections (speaker too, just in case), and try booting with a naked motherboard - no un-critical boards (sound board, network, extra SCSI, etc.), no monitor and no keyboard. You should get at least the CPU fan running, otherwise a power problem is suspected (the Power Good line being actually No Good, for example). If the fan runs and no sounds are heard, try attaching the monitor and see whether it displays anything. Ensure nothing in the video section is in conflict - you might have a PCI-X video on a motherboard with internal video, requiring physical jumpering to switch between Internal / External / (Dual Head). If you get a beeping error code, check the manual on its meaning.

Also, of course, consider the possibility of the motherboard being faulty.

If all else fail, get the M/B exact model and revision and I'll try scrounging up the appropriate tech manual and figure it out.

Posted on Aug 20, 2010

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How's the status light of your computer monitor? is it blinking amber? and the status light of your computer tower's power button? blinking amber as well or solid green or no light at all?

1. Disconnect all the connection at the back of your computer tower
2. Press the power button of the computer tower for 15 seconds
3. Reconnect the power button and the monitor cable at the back of your computer tower and turn on the computer (if it turned on that means that one of the device plugged at the back of your computer tower is faulty)
4. If still the same problem, open up your computer tower.
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