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Is the computer plugged in to a known good power source with a known good power cord? Also, make sure the power is fully seated on both ends. When you press the power button are you getting any indicator lights? The power button itself has an LED that will be either solid green, blinking green, solid amber, blinking amber, or off. Do you hear any beeps?
Remove the Power Cord, Open the Case and remove one of thememory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x onit with an ink pen. If it fails to boot then move the chip to the nextmemory slot and try rebooting. If it fails take the chip out and set itaside, then put the other chip in and try booting it in both slots. If itboots, just to verify that the chip set aside is bad, mark an x on it and putit into the open memory chip slot and try booting.
power supply on the back of your computer has most likely fried itself that is an easy fix all you have to do is either take down the part number and get the part and replace it yourself or take it into the shop
Most newer models of Dell computers now
have a diagnostic LED surrounding the power button on the from of the
computer. When you press the power button to boot the PC, the light
should be green and remain green under normal circumstances. Any other
lights will help you troubleshoot the power issue you are having.
A solid green light
means the computer is operating normally. A solid yellow light indicates
the power supply is operating normally but the computer is not
processing data. This could mean there is a problem with the CPu or
another component on the motherboard. A blinking yellow light
indicates the power supply is receiving power from the wall, but not
functioning properly. This generally means the power supply itself is
bad and should be tested or replaced. A blinking green light means
the computer is in standby mode.
So use the LED power light codes if
your Dell computer has them. Also pay attention to any unusual beeps or
sounds coming from the computer.
Well, I was sure that the voltage selection switch was in the right
place. And I found it highly unlikely that the processor power cable
would suddenly unseat itself. Ugh.
Then I had an idea. I flipped off the surge protector and then
flipped it back on. Tada! No more orange lights. Weird. The moral of the story: try the simple stuff first.
I hope this helps and please dont forget to rate my answer. Thank you!