Princeton 19" lcd vl1918 BACKLIGHT replacement

Did you try this monitor with another PC and already verify that the VGA cable is OK.
Common problem with Princeton monitors are due to bad DC filter capacitors in the power supply board, see example here:

http://s807.photobucket.com/albums/yy352/budm/PRINCETON/

this issue might not be because of your Monitor. Anyway, I can only provide manual to this legacy product of princeton if you want...

Look for bad caps, transistors, etc.
See my pictures here: http://s807.photobucket.com/albums/yy352/budm/Princeton%20VL1918W/

Basic LCD monitor and TV troubleshooting guide:

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV, Monitors, capacitors, and lamps pictures: http://s807.photobucket.com/home/budm/allalbums

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Please post back what you find.

Remove the stand and all he screw from the back and the bottom edge. See my pictures fo VL1918 which is similar to 1919.
http://s807.photobucket.com/albums/yy352/budm/Princeton%20VL1918W/

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague

blackbeard1, Could be it needs Filter caps. I would also closely investigate all solder connections of surface and through hole mounted electronic components for possible "frosty looking" "cold" solder joints that may be thermally intermittant!! 12fix louie

my 12 power supply was only 500ma, not the 4a needed. Got the monitor to power up but now the screen goes dark after 2 sec. Looks like a bad backlight issue. I'll replace the inverter board.

thanks

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

Check the Inverter card Connector which goes to pannel,Next Panel to AD card signal Cabble,..

Hello,

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

this is not a driver issue. There is a hardware problem. You will have to replace the lights, or purchase a new monitor.

Please rate me.

Thanks and good luck, let me know how it turns out.