Very common for this model that top backlight globe goes faulty.
Can be also inverter PCB fault.
If you have couple spare lights connect them to your inverter instead of panel lights and see if fault remains.
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Re: my monitor not stay on
This monitor is going into the protection mode due to a componentfailure. The unit should be sent or taken in to a service center fortesting and repair. The NEC customer support telephone number is1-800-632-4662. The website for customer support iswww.necdisplay.com/support center. They will be able to tell you whereyou can take you monitor for servicing. I hope this information helpsyou with you problem
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First place to look will be the power supply section, look for bad caps (bulging tops or bottom seals), the post back what you see so we can guide you further for direction such as voltage checking, see example of failed monitors due to bead caps: http://s807.photobucket.com/home/budm/allalbums
iv come across this before sometimes people can see that the monitor is actually working but the light has gone out id say bad capacitors that are breaking down. if you want to DIY it take it apart and find the light pcb usually built on the power supply pcb and look for bulging or swolen capacitors this happens alot in my opinion. if you can DIY it get the same caps or same value but better ones. I might be wrong but worth a look
Normally when this type of problem happens, the first suspect would be the inverter board, then the filter capacitors and lastly the mainboard.
A defect in one of the lamps and faulty inverter IC may cause the display to shutdown as well. If the lamp is defective, it will send a feedback and cause it to stop producing output signal thus the display just shut off once you switch in ON.
use f 8 to go to safe mode then set the resolution at the very least liek 8 bits or whatever the lower=st is and save it then restart in normal mode and then play with the resolution in display settings to get to the ma your video card will support.
Try connecting the wires properly. try changing the VGA cable. i had the same problem my screen goes black some times and pink i changed the VGA cable it was absolutely fine!!!
What is VGA cable VGA Cables Adapters Converters and Devices C2G
visit a computer mechanic for further trobleshooting