Power button works intermittently

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: Blinking yellow power led

check at the back of the tower you would find 4 LEDs(small lights) labeled ABCD in a row or you might have 1234 on the front panel. note the status of these LEDs when the problem occurs and check for the solution accordingly on the support.dell. website.

would also suggest to disconnect all the devices (keyboard mouse printers etc.)next time the problem occurs and then try to start the computer

SOURCE: Dell Dimension 5150 Stuck In Pwer Safe Mode

Sounds like a problem with the video card. Cross check the connections to the CPU. If its all fine, Then Connect the monitor to a diffrenet pc and then use the monitors keys to change it to a plug and play mode.This might help with ur problem

Frank Zabroski

• 268 Answers
• Posted on Jun 18, 2009

SOURCE: DELL DIMENSION 5150 SOMETIME WILL NOT SWITCH ON

You need to get into the bios of your system and setup the date, time, and disable floppy boot. You may also want to clean any/all dust/dirt/hair from your system and make sure your fans are working. Sounds like your cmos battery failed (you changed that) and that your processor/motherboard is failing due to overheating
Company Site http://www.attechcomputers.co.cc

SOURCE: Vostro 230 - Solid Amber Power Light

"power supply seems to be working?" If you had before this happened a issue where had to turn it on a few times to get it up---suspect bad caps in power supply---A look inside that will tell you if this is the issue or not. If the supply can be removed (most can) it can be examined or tested by most repair shops for little or nothing.

see attached photos of what bad caps look like in case you remove the supply to look at it.