He monitor turns on but remains dark, the power light comes on and i
can see activity on the screen when i press menu but only with a
flashlight. since all of the backlights are out at once is this a
driver circuit trouble or do i need to replace the lights?
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Your problem is usually caused by a bad power supply. You should be able to do the repair yourself, if just requires replacing 6 capacitors on the power supply board. Here is a link to a repair guide that shows how to disassemble the monitor and repair the power supply board.
Shine a bright light on the screen and press the Menu button... if you can barely see the outline of the menu come up in the middle of the screen, it means that your inverter / backlight needs to be replaced. You can get a new backlight / inverter for relatively cheap, so if you can do the repair yourself, it's worthwhile.
Otherwise it's the LCD panel itself, in which case you should go monitor shopping.
Well here is a test you can do. When the monitor goes black, take a flash light and hold at it a angle towards the monitor, if you can still faintly see the image then you have a blacklight/inverter issue. Another common issue with this is the capacitors on the inside. They will also cause this. If you dont see an image then the inverter will need replacing. As the steps for replacing all of this are quite long, ill post a few helpful tuts :).
For replacing the backlight: http://www.inventgeek.com/Projects/shorts/overview.aspx For checking/replacing bad capacitors: http://www.wizardanswers.com/liquidvideorepair.html
I know these arent your monitor but its generally the same idea with all of them. If this doesnt work it will be a inverter issue and if it comes to that just let me know and ill be glad to help :D
You have a monitor with a common problem. After a few years some LCD monitors
will blow a power supply. The problem is caused by parts called
capacitors overheating in the confined space of he monitor. If you are
good at electronics repair/soldering you can usually fix he problem. Check out a few pictures on my web site www.ccl-la.com/badcaps.htm
You can take the back cover off your monitor and look for the bad parts,
replace any that look like the pictues and your monitor should work
fine. The capacitors do need to be installed with the correct + and -
connections, note the stripe on the old one and insert the new one the
same way. If you don't want to try the repair yourself we offer a repair service for $35 plus shipping. If you don't see any bad capacitors then the next thing would be bad CFL (backlight tubes) in the screen itself. If it is that then the monitor needs to be replaced because of the tech skills needed to replace then. I hope this helps, if so please rate my solution.
Buddy Corporate Computer www.ccl-la.com Over 21 years of computer and printer support/repair
On the bottom of your monitor or on the right side is a set of buttons one is for brightness and contrast try to reset the brightness and then contrast. If this does not work you may need a new monitor.