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Power supply light blinking when computer off

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Blinking light on 20 inch apple display


Blinking light on Apple cinema display usually indicates insufficient power from the power supply. Test it with another power supply from ANY cinema display (23" and 27" power supplies are ok to test with).

Feb 03, 2014 | Apple Cinema HD 30" LCD Monitor

1 Answer

I have a Dell Dimension E521. When I cut the power on everything comes on including the monitor, but the monitor will stay black. It does say something about power save hit any button but the screen


A solid green light means the computer is operating normally.

A solid yellow light indicates the power supply is operating normally but the computer is not processing data.

This could mean there is a problem with the CPu or another component on the motherboard.


((A blinking yellow light indicates the 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.

You should consider visiting Dell Support and downloading the manual for your

your Dell computer. So use the LED power light codes if your Dell computer has them.

hope this helps

Sep 10, 2012 | Dell Dimension E521 PC Desktop

1 Answer

My seagate freeagent 1tb is blinking whit lights and my computer does not recognize it. Help me


***Please NOTE***
Touch the drive and put your ear to it, to test if the drive is spinning and working. Do this while it is powered on. Also, try disconnecting the USB cable, reboot the computer, re-connect USB cable to another USB port on computer. If you still have the same issue, try the below solutions.
  • Make sure the computer and external hard drive are powered on.
  • Disconnect the external drive's USB or the eSATA cable, which ever one you're using.
  • Disconnect the power supply plug from the external drive.
  • Power off the computer.
  • Disconnect the computer's power supply cord for 60 seconds.
  • Reconnect the computer.
  • Power on the computer.
  • Connect the power supply to the external drive.
  • Connect the drive's USB or the eSATA cable and check for detection.
If the still no detection and still blinking lights on the drive, check the power supply to the drive.
Check to see what the led light on the power supply is doing.
If it's blinking, power down the drive, unplug data cable and then reconnect the power supply to another electrical outlet. If it still blinks repeatedly, then you power supply is bad.
If the led is solid (lit and not blinking) follow the same steps from above to connect it to another outlet.
Next, plug the power supply to the external drive and power it up.
If the power supply starts to blink repeatedly, then your controller board inside the enclosure is bad.

Thank you for the opportunity to help you.

Jun 04, 2011 | Seagate FreeAgent Pro 1TB External USB...

3 Answers

Blinking amber light.I changed 2 motherboards out and still blinking amber. Changed the CMOS battery, same thing blinking amber. Swapped memory and removed all pci cards, same thing. The motherboard has a...


I'm not clear about the blinking amber light you are referring to. Is it on the computer or the monitor.
I checked Dell's web site for the service manual for this computer model, & found this document:
http://support.dell.com/support/edocs/systems/dim8300/sm/adtshoot.htm#1102195

If the blinking amber light is on the monitor, check the connection between it & the computer itself. Make sure the cable is not damaged & that it does not have any broken pins in the socket.

Dec 16, 2009 | Dell Dimension 8300 PC Desktop

1 Answer

PC will not turn on blinking green light on power supply


Hi,
The green light on power is blinking, it means power supply working in main power and the main supply not constant that time after constant the green light, then turn on the PC.

Thanks




Aug 13, 2009 | Intel SR1350-E Server Chassis...

1 Answer

My e machine is blinking a yellow light.


Sounds to me like the power supply is bad cause its not providing the right voltages which is why the computer can't turn on.

Try a different known good working power supply. If it turns on then your original power supply is bad. If you still get a blinking yellow light then that means the motherboard is bad for sure and would need to be replaced.


Jun 02, 2009 | Computers & Internet

2 Answers

Blingking light on my motherboard, no power.


Chances are your power supply and computer is fine! From other forums on this problem (which I also had), I've learned the following:
1. If you unplug the computer for a half hour or so (the blinking green light will gradually slow down and quit) and plug it back in, the situation will correct itself and the green light will be steady; however if this does not work,
2. a reset that works for a lot of people with the blinking light problem involves leaving the power supply plugged in and unplugging the power supply connection at the motherboard (it usually also has a blinking green LED) and plugging it back in. To read up on how to do this, Google "blinking green light on computer power supply" and read through some of the forums and you'll come on more specific instructions. Usually, you have to wade through everybody telling you to replace the power supply or your motherboard is fried. It's worth a try for a quick fix, just in case those situations don't apply!

May 30, 2009 | Sony VAIO VGC-RB42G PC Desktop

1 Answer

Does not bootup and top light on power supply is blinking


Replaced the Gateway Power Supply, 450W.RDNT and the Gateway Power Distribution Board, 960/980 Servers. When the top light is blinking on the power supply, there is a power problem.

Mar 18, 2009 | Gateway 960 Series (gtwy960) Server

2 Answers

Power supply light has blinking green light


If the power box is bad, The computer will not come on. if you only get a green light, you would need to start with replaceing the power box, if you get a new one and the same thing happens, then the mother board is bad too.

Nov 26, 2007 | HP ATX-300-12Z (ATX30012ZBD) 300-Watt...

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