Having problems with your Westinghouse L1975NW Monitor ?

Broken LCD Backlight

\015 I have a westinghouse 19" widescreen LCD monitor. It turns on and with a lot of light on it the picture is thee but otherwise looks black. It appears to be a problem with the backlight. It has 4 ccfl lamps and none of them even flicker which makes me thing it is a problem with the inverter and not a dead bulb. But the inverter is integrated so replacing it is not easy. I also noticed that a couple of the capxon 220uf 25v capacitors may be bulged, but if they are it's not by much and I am unsure if that is the problem. I'm at a loss of what to do next and would like to try to repair the monitor for under $50. Any suggestions?\015

Answers :

Dtoreilly, You will need to check all the Electrolytic Capacitors. Here is what I found. I measured some units on a Stanford Research Systems SR720 LCR meter. Units are CAPXON #1 2200uf @ 16v now 119uf
\015\012 #2 2200uf @ 10v now 48.8uf
\015\012 #3 2200uf @ 10v now 10.8uf
\015\012 #4 2200uf @ 10v now 136uf
\015\012 #5 2200uf @ 10v now 29uf
\015\012Yes their tops were only minimly bulging also. So I guess it really dosen't matter very much if they are only swollen a little bit!!!! I'll let you interpret the DATA I have presented here. I know one thing though-- If I were mass-producing anything that needed low voltage filter capacitors on the printed circuit board--- They certainly wouldn't be made by CAPXON!! Bye for now I'm louie12fix on fixya or lmistyrel @aol.com
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