Black LCD Monitor Dell Inspiron 8600

for your video problem, you may be stuck in a different mode try holding the Fn key and hit F8 this toggles through the modes
1 - LCD on laptop only
2 - LCD and external Monitor
3 - External monitor Only

if this does not work you may have a LCD issue with the laptop .. let me know how it goes first

If the monitor remains black when you try to reboot, the CCFL (backlight) in the monitor has probably failed. If your look at the monitor from a sideways angle, you may be able to make out some graphics when the computer is on. If this is the case, you need to replace the CCFL or the whole LCD assembly. If you are uncertain, you should check the ribbon connectors going from the main case to the screen. If you get different results when on AC power, this could be a shorted battery or a bad power supply board. If your laptop has an output for an external monitor, you could use this to determine if the problem is with the monitor only, or with the graphics card and/or motherboard.

The invertor lamp has gone bad, so you would need to replace the LCD screen. there is nothing else you can do. try to connect an external monitor adn then press Fn + F8 to switch the video to the external monitor. if the image on the external monitor is fine then its the lcd. if the external monitor has the same image then motherboard problem. you can also try Fn + Up arrow key to increase the brightness.

There is a symbol of Two monitors on F3 Or F4 button

1. Press Fn key and hold it
2. by holding Fn key press F3 key

Your monitor will start displaying

connect an external monitor on your machine and check if display is ok on the external monitor. if yes, try to re-install your video driver and check if display is ok on your laptop.

if both doesnt have display (external monitor and laptop's display) i suspected your lcd display is faulty.

just re-connect LCD connector properly its a loose connections. check also inverter maybe loose.

There will be a function switch to select the view mode ( Lap top monitor only/ LCD only / Lap top monitor and LCD Monitor) Select either the last two.


I hope this will solve your issue.

Good Luck.

If my solution proves useful please accept it.

Regards
Arjun

The Fn +F8 combo will toggle between 3 options,

LCD

LCD and EXTERNAL

EXTERNAL only

If your video output works fine when connected to an external monitor, then the issue is with the LCD display panel. I’m afraid the only way to fix this is to have the LCD panel replaced.


Your responses are intended to improve the level of service provided. Please rate your experience.
Thank You.

Can you hear the Windows startup noises but can't hear it?

Does it work plugged into an external monitor? (Any good CRT or flat screen should work.


Be sure to plug in the screen before you turn it on.
If it doesnt output to the LCD automatically you may have to hit FN-F8 to switch to external.

If it works on external monitor you are just dealing with a screen problem of some sort - either a bad inverter or backlight in the LCD most commonly...

Let us know.