Viewsonic VG191b

C

Claudio Cossutta

Guest
Hi ! I am repairing a Viewsonic VG191b LCD-monitor with disturbing thin
short horisontal lines all over the screen.
Is there anyone that has heard about this problem or has scematics on this
monitor ?

Regards

Claudio
 
Check the electrolytic capacitors, some will be surface mount. Check
them for high ESR. I've repaired a few LCD monitors with "noisy"
pictures, many have high ESR replace the worst first, then check the
picture quality. I didn't replace all the ones that were in the
"questionable" area of the ESR meter, but replace all that were "bad"
per the ESR meter.
 
"carneyke" <carneyke@localnet.com> wrote in message
news:1134566892.386648.4780@z14g2000cwz.googlegroups.com...
Check the electrolytic capacitors, some will be surface mount. Check
them for high ESR. I've repaired a few LCD monitors with "noisy"
pictures, many have high ESR replace the worst first, then check the
picture quality. I didn't replace all the ones that were in the
"questionable" area of the ESR meter, but replace all that were "bad"
per the ESR meter.
Click to expand...
What "ESR meter" did you use?

--
James T. White
 
Cap Wizard made by Independance Electronics (has analog meter with
green / yellow / red (like old battery testers) for good / compare /
bad). There were too many in the yellow zone to change, after replacing
the ones in the red zone and testing the unit worked fine. It has been
back in service for over a year now.
 
"carneyke" <carneyke@localnet.com> wrote in message
news:1134572404.945943.188270@f14g2000cwb.googlegroups.com...
Cap Wizard made by Independance Electronics (has analog meter with
green / yellow / red (like old battery testers) for good / compare /
bad). There were too many in the yellow zone to change, after
replacing
the ones in the red zone and testing the unit worked fine. It has been
back in service for over a year now.
Click to expand...
Thanks. Cap Wizard looks like a nice device.

--
James T. White
 
I have the Cap Wizard and the Dick Smith ESR Tester.
I like the Dick Smith one best.

Clarence
Southwest Monitors & Printers

"James T. White" <SPAMjtwhiteGUARD@hal-pc.org> wrote in message
news:43a0dee3$0$500$a726171b@news.hal-pc.org...
"carneyke" <carneyke@localnet.com> wrote in message
news:1134572404.945943.188270@f14g2000cwb.googlegroups.com...
Cap Wizard made by Independance Electronics (has analog meter with
green / yellow / red (like old battery testers) for good / compare /
bad). There were too many in the yellow zone to change, after
replacing
the ones in the red zone and testing the unit worked fine. It has been
back in service for over a year now.


Thanks. Cap Wizard looks like a nice device.

--
James T. White
Click to expand...
 
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