Go to Control Panel...to DISPLAY...and you should either find a adjustment there to brighten your screen. Or look On the "F-Series" keys or somewhere on your keyboard for a Brighten SUN or dark SUN, which you have to press the blue key along with that F series key to brighten or darken the laptop. Good luck
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If you can see the OS in a bright light on the moniter,"It seems to be working in the background", I would thing it's the CCL or back lighting. Sometimes the small switch that shuts-down the CCL when you close the lid of the laptop gets stuck with age. I have repaired some monitor problems, the switch is located near/under the hinges. Locate the tiny switch and make sure it is moving freely, as in, up to turn-on CCL, and down to turn-off CCL. The other issue I fixed was the "ribbon-cable on the rear of the flat monitor. It get jared loose sometimes with a bump.
I would guess two things, 1. you have a bad connection on the DIMM socket or on the DIMM fingers. You can try to clean the connections. 2. You have a bad DIMM or the wrong speed DIMM.... check to insure you have the right memory.
First, make sure that your old dell monitor is working. Also make sure that the VGA out-port on your laptop is also working (by using a known good screen on it first)
Connect the Dell screen onto the VGA port of the laptop, then use "FN and F6" to source to the Dell monitor as external unit. There should be a mini screen that pops up where you can choose the monitor with the FN F6 key combination.
you can try to change wire but extremely hard to do so. most like your monitor has blown and to fix this problem you have to get the exactly same monitor for the laptop your better off hooking it up to and external monitor.
Have you tried hooking up an external moniter? If so do you have video on that moniter? If you do have video on the external moniter then you most likely have a bad inverter or a bad lcd panel.I would replace the inverter first because it's not very expensive.If that doesn't work then you can replace the lcd panelAnd if that doesn't work you have problems at the system board level.
I think your right although have you noticed when you change a TV from PAL to NTSC,(and other display settings) that the screen turns green. Is this a possibility. If your LCD was fine B4 and the problem has occured without your help then sorry to say it sounds like the moniter is playing up. Anyway its just a thought.
sounds like you need to replace the lcd backlight which lights up your cd display when it goes you can still see things but it's very dim
if you need help ordering that part let me know and i'll find you the product code
hope this helps