Hi,i bought this monitor in late 2009, used,its from 2007.
im a happy owner since then.
lt has never been too bright, so i used the brightness at 66-100
doing that result in a whine(high frecuency sound). so i tried to use it at 50, just for precaution.
for 2 years no problems
A week ago, after using mi monitor for a couple of hours,i moved it to my desk(it was in a chair) and get out.
several hours later i power on and the image lasted 1 minute. then no backlight(but stayed gren light on)
if i unplugged it and waited a bit, it lasts 30-40 secs
if i try to re power on its 2 secs to black.
----
so i decided to take a look,and see if i could do something.
my first thought: PSU related problem
so i changed al the electrolytics. except the huge one
tested diodes, the mosfet(sk3548), resolded critical sectors.
all seemed okay, no bulging capacitor or cold joints of solder.
tested and it was the same.. first time lasted 30 secs then it was 2 secs to black.
when it lasted 30 secs, i saw a flickering every 3 or 4 seconds.
------
so i looked further into the inverter, changed all the electrolytics an resoldered transformers.
no changes.
i also tried to power on the monitor with 1 or two of the 4 ccfl conectors, nothing
---------
i have dissasembled the LCD panel now and have access to the tubes.(photos)
should i recap all the boards?? i have crappy Trec `s capacitors, but they are new
what should i do?
Many thanks in advance, sorry for grammar errors(tell me so i can correct them)
cheers from argentina
PD,
1 i have done most of the 2 sects to black excellent tutorial, except th tranformer part.
2 im sorry if its to large i can resume it and put spoilers.
im a happy owner since then.
lt has never been too bright, so i used the brightness at 66-100
doing that result in a whine(high frecuency sound). so i tried to use it at 50, just for precaution.
for 2 years no problems
A week ago, after using mi monitor for a couple of hours,i moved it to my desk(it was in a chair) and get out.
several hours later i power on and the image lasted 1 minute. then no backlight(but stayed gren light on)
if i unplugged it and waited a bit, it lasts 30-40 secs
if i try to re power on its 2 secs to black.
----
so i decided to take a look,and see if i could do something.
my first thought: PSU related problem
so i changed al the electrolytics. except the huge one
tested diodes, the mosfet(sk3548), resolded critical sectors.
all seemed okay, no bulging capacitor or cold joints of solder.
tested and it was the same.. first time lasted 30 secs then it was 2 secs to black.
when it lasted 30 secs, i saw a flickering every 3 or 4 seconds.
------
so i looked further into the inverter, changed all the electrolytics an resoldered transformers.
no changes.
i also tried to power on the monitor with 1 or two of the 4 ccfl conectors, nothing
---------
i have dissasembled the LCD panel now and have access to the tubes.(photos)
should i recap all the boards?? i have crappy Trec `s capacitors, but they are new
what should i do?
Many thanks in advance, sorry for grammar errors(tell me so i can correct them)
cheers from argentina
PD,
1 i have done most of the 2 sects to black excellent tutorial, except th tranformer part.
2 im sorry if its to large i can resume it and put spoilers.
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