Having problems with your Dell Dimension 3100 PC Desktop ?

My Dell Dimension 3100 will not boot up after I had opened the side cover to clean the interior of dirt using a brush and a vacuum cleaner. The only light I get now is an amber light on the ON/OFF button which would normally turn green on successful boot up.


Answers :

The first thing that i would do, would be to unplug the power cable and network cable from the back of your computer.\012
let it sit for about 15 minutes.

plug power and network back in. Amber usually indicates a power fault condition, hopefully you will see green now when you try to turn it on, and also see the hidden diagnostics numbers lighting up as well. (the green numbers 1-4 right above where the power button is)

If not, then with the power and network cables unplugged, give all the power connections going to your motherboard a good look over for any that may appear to be not quite seated. Gently pushing down with finger and thumb with a top down pressure (not really hard, it doesnt take much to reseat these if they are loose.
There is a wide flat gray cable that carries all the connections from the front of your computer to *********** board. this is located very very close to the power supply. try gently pushing down on that to see if it was loose. if it was removed when you cleaned it, i would pull it out again and check for any bent pins in the connector on the motherboard.

Also checking your drive cables going to the motherboard, and again applying very gentle pressure, top down.

Reseating the memory may also help but this doesnt sound like a memory related problem.

plug power cord and network cable back in.
If still no boot,
unplug power cable and net cable. then one last thing to try is removing the CMOS battery, and letting your system sit for at least 6-8 hrs. there is a jumper method of doing this but unless you are familiar with setting a jumper i don't recommend it.

reinstall your CMOS battery, plug power cable and net cable back in.
Try to power up

If you still have the problem, much as i hate to say it there is a high risk that there was ESD (Electrostatic discharge, static electricity) that does destroy sensitive computer components.

If your vaccum has a plastic nozzle, even just a split second contact on the motherboard in the wrong spot is enough to do the damage. im only putting this in as a last resort, but ive seen this type of thing quite a few times. 
If this is the worst case scenario then it would require replacing the motherboard.
hopefully this helps, and if i have helped you please dont forget to rate
Generally the indication of a failed motherboard if the power LED is solid Amber

Things to check:
\015\012
    \015\012
  1. Ensure the 4 pin power connection for teh processor is connected (2 black 2 yellow wires)
  2. \015\012
  3. If the system has an expansion video card, make sure it is fully seated.
  4. \015\012
  5. Ensure the main power connection on the motherboard is fully seated.
  6. \015\012
  7. If still not change, remove all expansion cards and see if any change
If no change, replace the motherboard

If the power LED is flashing amber, then the power supply is suspect.

If you get an static indication of the 1234 LEDs on the center panel, post the indication (#4 example is memory) In a normal boot, the flash thru a sequence then all go off.
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