Do the fans run? If not the power supply is most likely bad. Hopefully it didn't trash the motherboard, memory and any installed cards. If you can't hear the hard drives spinning up, then it has to be the power supply
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 GX520 PC Desktop Problem
An Amber blinking power button indicates a low or missing voltage problem. 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... Remove the memory modules and disconnect cables to CD/DVD drives. Look at the USB ports to see if any are damaged.
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SOURCE: Dell 5150c shuts down orange flashing light
It was a faulty or worn out power supply fan. I just replaced it and the computer has been running for about an hour and a half and still no shut down. The system temperature is stable. It runs quieter now. New fan cost 13.88CAD.
SOURCE: Dell 5150c shuts down orange flashing light
As a temporary measure, taking the side panel off the dell 5150c stopped it from shutting down, so in my case it was clearly a heat problem, as suggested by previous the poster. The following instructions assume you're comfortable replacing computer hardware components - do at your own risk!
The solution is to buy an 'air duster' and some thermal compound for the CPU heat sink. If your CPU fan doesn't sound healthy (mine didn't), also buy a new one (ca. £20 on ebay: search for G9474 ).
Read the service manual: http://support.dell.com/support/edocs/systems/dim5150C/en/sm/index.htm for details on how to install / remove the fan and heat sink.
Clean out dust from the heat sink with air duster. Remove the fan, and clean or replace (recommended). Also clean the grill in front of the fan. Clean off old thermal compound from the CPU / heat sink and replace with a thin layer of fresh compound. Replace heat sink and side panel and you're done.
SOURCE: Dell Dimension 9150, flashing orange light on
kindly check your processor. isolate it by using other processor with the same specs.
A solid green light means the computer is operating normally.
A solid yellow:- the power is operating fine but your computer not processing data. This could mean there is a problem with the CPU or another component on the motherboard.
A blinking yellow light: 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
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