The power button on the front, will not turn green and power the unit, instead there is a yellow flash, and it worked one time when I unplugged the computer and let it sit for a couple of hours.
Power supply needs to be replaced
SOURCE: pover up trouble
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?
SOURCE: Dell Optiplex GX260 Tower flashing yellow power button
Hi
Power up the Optiplex GX260 and check the QUAD Pack Diagnostics LEDs (located at the back). Compare the LED pattern to http://support.dell.com/support/edocs/systems/opgx260/en/ug/solvprob.htm#1167139 for more info.
Ideally, to troubleshoot and resolve the issues, try removing all PCI devices, disconnect all external devices/peripherals including keyboard and mouse. You may leave the Monitor connected. Power up the PC and check for successful Power On Self Test (POST). If POST completes (generally fails on "Keyboard not present"), shutdown, connect keyboard and try POST again.
If all goes well, install PCI devices one at a time and test successful POST. This will help identity a failing device.
If issue persists, after removing all devices, remove the CMOS battery for about 90 seconds and try POST again. If same, remove all DIMMs (Memory) and check for beep codes. Compare beep pattern to http://support.dell.com/support/edocs/systems/opgx260/en/ug/solvprob.htm#1176760.
NB: Ensure to remove power lead and press power button briefly to use up flea power before working in the system.
If the system beeps, it suggests that the CPU and systemboard are "likely" fine. Install one DIMM at a time and test successful POST. If there no beeps then the systemboard and/or CU is/are at fault.
Regards
Mike
SOURCE: dell dimension 5100, power button has turned orange
If under warranty contact Dell? I had this same problem, a new motherboard and fan assembly fixed this problem. Bad capacitors on the motherbard.
SOURCE: Orange Light
you need to replace the motherboard lithium battery. Looks like a watch battery.
SOURCE: Dell Optiplex GX150 will not boot - no beeps but has error lights
You first need to make sure your memory is secure.
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