Question about Dell OptiPlex GX260 PC Desktop

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Dell Optiplex Power-on Problem

I have this Dell Optiplex GX260 desktop computer which gives a yellow light on power button when i turn it on.everything in the computer (that is the system components) receive power and thus are running but there is nothing showing up on the monitor. i have tried switching it off and unplugging and plugging the power cable, taking out the power supply, reseating the processor and taking out the RAM and inserting it in again but to no avail.what could the problem be? please help me out

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An Amber or Yellow power button means that the power supply is receiving power from the source but is unable to properly distribute it to the components. This can be caused by a defective power supply or a defective motherboard. Just to make sure that nothing else is causing the problem, remove any PCI cards like modem, video card, sound card, etc...
Look at the USB ports to see if any are damaged.

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Posted on Jan 18, 2009

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1st remove all PCI cards, see if anything changes.  If no change\:
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If all goes well, install PCI devices one at a time and test successful POST. This will help identity a failing device.
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Reference the Power LED States
Dell OptiPlex and Dimension computers and Dell Precision workstations have incorporated the use of the multi-state power button LED as a hardware status indicator. The power button LED illuminates in two different colors and can also blink, which allows for indication of five different system operation states. (Table 1)
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Regards
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