Monitor power led blinking on and off. Won't turn off unless unplugged. Won't display computer graphics either. Quiet clicking noise each time it blinks off.

A computer monitor has a front-mounted LED that displays its current status and flashes in the event of an error. When an error occurs, the flashing may be accompanied by an error message on the screen. If the screen does not display an error message, the problem most likely falls into one of four common categories.

Unsupported Display Mode A video card has the ability to send output to the monitor at many display resolutions and refresh rates. However, no single monitor is capable of supporting every possible display mode. When the video card sends an unsupported display mode to the monitor, the monitor shuts off to prevent damage and blinks, or displays an error message. Standby Mode b> When a monitor detects no video signal from the computer, it assumes that you have turned the computer off and enters standby mode to reduce power consumption. Dell and HP monitors display an amber light when in standby mode. The status light on an Apple monitor blinks slowly. Incorrect Power Supply Some monitors such as certain Apple Cinema and Studio displays use external power adapters. Because different power adapters may have similar connectors, these monitors are designed to detect when an incorrect power supply is connected and blink the status LED rather than attempting to turn on. In the case of an Apple display, the LED blinks in an alternating short and long pattern. b> Backlight Failure b> A flat panel LCD display has an LED or fluorescent backlight that illuminates the pixels and makes it possible to see the contents of the screen. If the backlight fails and requires replacement, the monitor is unable to display any information. In some cases, you may be able to resolve this issue by turning the monitor and computer off, disconnecting and reseating all cables. If the monitor still has a backlight issue, it requires professional service.

No signal at the monitor indicates (if you know the monitor is working ok) a failure of the graphics chip or graphics card, The lack of indicator light on the num lock LED and the lack of power to the mouse would indicate that there is a major issue with the motherboard.
you can try using another monitor to confirm the problem lies with the graphics, and in the case of the keyboard and mouse, swap them for a usb version, if they work, the Ps2 ports are probably damaged.
I'd be thinking of replacing the motherboard

Causes of OSD LOCK
1. The monitor is incompartible with the system unit, especially for newer version units versus older monitors
2.Older monitors display attempting to much up to the improved definition functions of newer system units display an operating system malfunction, interpreted as monitor malfunction instead. OPERATING SYSTEM DISPLAY MALFUNCTION

hardware checks
1. consider changing the graphic card on the system unit after attempting to adjust the appearance settings on the desktop once the computer is powered on.
2.Once changing the graphics card on an old system unit, consider changing the processing chip for reasons of achieving peak performance of the new part installed.
3. Once the fxing of the parts are complete, the monitor would continue to display OSD requiring entire system restart or book. after which, adjusting the appearance setting that should by which time display new list capacities due to the new device changes

First Remove the VGA cable from your pc backside and turn on the monitor alone and you should find some message that VGA cable unplugged or VGA not found like that... If it comes then the monitor is ok...

Then power on the pc and you should find out the harddrive's red led will blinking and you will get also one beep then it will ok,
if it is really problem with graphics card or display issue, you should get some beep codes continuously (2 or 3 beep sounds)

Thanks...

check that the data lead is secure at the computer and at the moniter,,,no display can be because the graphics card may be faulty

Do this to check if your monitor is in working state or not...!

Step 1:- Turn on your computer.
Step 2:- Unplug the Video Cable of your monitor which is connected with the computer.

( Video cable:- Cable going from the back of your monitor to the back of your tower. It has a plug with two screws on the plug ends, which you can unscrew to unplug it. Thats how it looks like. Some times it is in grey in color some times in blue.)

Step 3:- Now check on your monitor. If the display says " No Input Signal " :- your monitor is fine. Some thing wrong with the computer graphics.
If there is not display and the monitor light is blinking or solid the monitor has gone bad.

( Note :- Remember when you unplug the video cable do not unplug the power cable of the monitor. )

Let me know if it helps.

it sounds like the inverter was defective, the monitor will be fine for few seconds then go off but power light still stay on with Green. You can contact with manufacturer for repair service if it still under warranty.

check the capacitors inside the monitor, as they may be broken, and they start screen up, just change em and it should kickstart fine

if you you do not have your computer connected to a 750 jewel power strip you may have damaged the power supply if you are not electricly inclined you can buy a power supply checker at radio shack about $12 power supplys run about $39 on up to $100 depends what you want that clicking sound sound like the cd i don't know if you have a floppy drive but if you installed a Video card you know how to open the inside of the computer .
open the computer panel make sure that the power plug is unpluged you should see a battery there is a little tab on it push it and the battery should pop up just take it out for a few sec and press the power botton reinstall the battery .close up the case plug the power cord bach in and when the pc starts press F1 or F2 or Del to enter bios reset the time and date and go to video setting it should say pci if you have a video card installed if not set it to onboard video pres Esc than F10 to save and restart the computer you should be set .let me know what happens

Try lowering the screen resolution to 1024x768 and see if it displays on the screen. You will need another monitor (possibly CRT as they do high resolutions) to do this.