Question about Dell OptiPlex GX260 PC Desktop
Everything was working great, not even any slow starts (XP Home Ed). We shut the computer down, went on vacation for 6 days, came home -- now when you press the power button the light flashes yellow and nothing happens. I have hunted online and found suggestions from replacing the PS to messing with the front USB ports. Any suggestions?
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.
Posted on Mar 27, 2008
I had the same problem (flashing yellow light on power button). Not sure if anyone with this unit actually has the 4 LEDs, but I didn't either.
It was the power supply. Swapped it out and all is fine now.
Posted on Jul 27, 2009
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