Hi, my monitor does not display anything but the lid light just keep blinking.

Try re-seating the video cable. Try another monitor on this computer if you have one available. Try this monitor on another computer. That will narrow down where the problem lies. It's either the video card or the monitor which is bad. Of course if either is under warranty you may get a replacement, if not get your credit card ready :-) Good luck to you! =============== I would also look at the cable connection and see if there are any bent pins. This has caused issues for me in the past. Just be careful rebending the pins if any are bent. They are fragile and may snap off.

Unplug the display from your macbook, and restart your macbook, when it's fully restarted and you are logged in, plug the display back in, then check to see if it is detected. Macbooks don't like to be put to sleep (shutting the lid) with a display connected, this causes issues with display detection. So always unplug your display and wait about 5 seconds before closing the lid on your macbook, and when you open the lid, wait another 5 seconds before plugging in your display. The only time it is acceptable to leave the display plugged in when you close the lid is when you plan to use the macbook in clamshell mode, this is done by plugging in and configuring your display, shutting the lid, and then "waking" the macbook from sleep mode with an external mouse (wired or wireless will work). That will start the macbook using the external display as the main display, without even turning on the macbook built-in display. Never connect or disconnect an external display when your macbook is off or in sleep mode. Have a nice day.

most likely inverter is on its way out

if it does it a lot when you move the lid back and forth it could be a cracked display cable

make sure that all the cables are connected FULLY.
blinking light means that there is no signal.

The monitor requires service The monitor is not receiving a signal from the computer

Hi..there,
It's seems you got a busted backlight inverter. Need to replaced a new one or repaired it. Happpy Holidays!

Yeah, I called Dell yesterday, and they said it was a problem that I could not fix myself. Whether that's true or not, I don't know, but my monitor was still under warranty, so they shipped me a replacement right away. I already got it this morning. 

FYI: Their monitors carry a three year warranty. 

If this is a lcd monitor here is the problem....
http://www.fixya.com/support/t859266-koss_kld2700_lcd_tv_no_picture
As in all lcd tv or monitor the backlight will soon go out and have to be replaced.
Hope this helped...
Kevin

Make sure the monitor is set for the correct input

One of 2 possibilities come to mind. 

 

1,  The vga chord is loose on the back of the monitor.

2, Your resolution is set too high or low to be displayed.

 

The blinking light means that the monitor is either not getting or understanding a signal.

 

Hope this helps.