Screen lit up, but nothing displayed (black)

Try this link:


Xerox XG 91D 19 in Flat Panel LCD Monitor

coolvegasmik, Sorry, to hear that your "cold cathode-fluorescent-lamp-back-lit-lcd-monitor" is not working. Did you hold and point a bright flashlight 1 inch from the lcd panel when it went to "black-screen"??? Did you see any icons on the "black-screen"?? Software NOT a fix for this "black screen of death" problem. You or electronics technician will need to open L91A and look for bad capacitors or bad soldering on the power supply printed circuit board. If unit is 4 to 6yrs old, just trade-in for new wide screen unit. See video clips of swollen bad capacitors at YOUTUBE when you search "lcd monitor repair". All lcd monitors (99%) use same basic design and principle of operation. Sometimes ccfl back-lit lcd monitors can be repaired for less than $6 in parts and monitor will work for 1 to 3 more years. 12fixlouie

This happened to me and I was able to fix it. I cracked it opened and found a bad capacitor, bought a replacement at Radio Shack and I'm back in business. Actually using it right now to post this.
-Jon

most likely is the power supply in the monitor.
gateway LCD has a building power supply in the monitor. it supplies 38W to the lamp.
since there is no display, it tells me that there is no power to the monitor.
if try another monitor and it works fine. then the problem is the monitor. (dispaly lamp is good for 17 Years- according to the tech spec.) but the power supply is pushing too much power.
other vendors max power is apporximately 30W.

make sure there is nothing behind the monitor and has good air flow. Since there is no fan in the unit. it need to vent the hot air natually.

ccfl tube is destroyed or fuse on inverter board

If you look on the back of the monitor it has the name of the manufacturer - which I googled and found this warranty information: http://www.sylvania-displays.com/Support/warranty.html

If you already know that your monitor is out of warranty but want to try to figure out what's wrong with it, these are the contact numbers:
California:
PTI
7373 Hunt Avenue
Garden Grove, Ca 92841
Phone: 714-799-3899
Fax: 714-379-6290
Hours: 8AM to 6PM Pacific Time
Texas:
PTI
10849 Kinghurst Suite # 120
Houston, TX 77099
(281) 530-4100
(281) 530-4104 fax
Hours: 8AM to 6PM Central Time
For further warranty information, please contact our Customer Service Department
Call our toll-free service number at 1-800-776 8439 for out-of-warranty service rates.

Sorry time for a new monitor you might open it up and look at the capacitors and see if any need to be replaced the bad ones will be domed on top normal is completely flat

Its the problem of the main display board. Not the SMPS. There will be another board inside. You have to replace the board or If some body may fix if you have spare parts of the board.

I too have an LCD Xerox - it worked fine for a while, then kept going blank and going onto standby. Unplugging and reconnecting from both pc and power seems to reset it. It hadn't happened for months but started again the other night when it occurred to me that I had just downloaded MS security updates - I've removed the ones that I downloaded just before it started happening again and the problem seems to be solved. Hope this helps someone.

Just tore mine apart so here is some help. You need to remove the two screws on the back of the case on the bottom. Then you remove the front cover it slides toward the top of the screen then lifts off. You can pry it off if that doesn't work. If you want to seperate the screen from the back cover you then need to remove the swivel mount and the other two screws from the back cover.