My monitor won't light up

The blue light probably simply means that the computer is not turned on, but the monitor is. Just turn off the monitor, and the blue light should go away.

If the monitor is not working then it should not be related to the camera. Do you see any error message on the monitor? Try unplugging it from your computer and tell me what you see on the screen.

Floating dialog box is the monitor's self test. Your monitor tests good. Your computer is the problem.

my nb500 netbook wont turn on i slamed it shut now wont turn on

try to check your power cable if it is plug in.

possible bad back light inverter board. refer to service tech

One thing to try is if you can, connect an external monitor to the computer. Turn it off and then back on with the external monitor on. If video on the external monitor then the problem is with the laptop monitor most likely the FL inverter or the lcd itself. If no external video, it is most likely a motherboard problem.

If your monitor shows a yellow light and it won't turn green, the problem most likely lies with the computer. If your computer is not sending a signal to the monitor, then you have a computer problem. One way to test this is to turn the monitor off and the computer off, too.
Turn the monitor on and if it is working, it should display a message telling you that there is no signal. If you see that message, you can assume the monitor is working. If you do see it, now turn on the computer and see if the message changes.
If you turn the monitor on and you get no message, you can assume the problem lies with the monitor itself.
If you have access to another monitor, hook that one up to test the computer output.

You can now either get the monitor fixed or the computer fixed, depending on which one is bad.

check your connections to your computer, test it on another, if it works your video cards bad if not need to buy a new one..