Question about Westinghouse L1975NW Monitor
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?
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
#2 2200uf @ 10v now 48.8uf
#3 2200uf @ 10v now 10.8uf
#4 2200uf @ 10v now 136uf
#5 2200uf @ 10v now 29uf
Yes 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
Posted on Sep 25, 2009
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Posted on Jan 02, 2017
if its like my 20v5 then it might be a power supply problem with bulging caps.
the link below shows the part numbers how to replace all the caps for my 20v5 model. look at that and sillybits entry how to take it apart. your monitor should be similar but i would talk apart first to verify the same caps exist in your unit.
Posted on Nov 08, 2009
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