Vizio VX20L

J

John Keiser

Guest
Neighbor's TV. Complaint of poor image quality.
I fixed her Dell LCD monitor, replacing a few caps and a driver so she hopes
I can help her again.
Powers on, sound is fine. Image is stable but quality is noticeably poor.
Using the cable input, factory default settings are washed out.
Custom settings work but best balance between brightness and contrast still
leaves a lot be be desired. The quality might be described as an old CRT TV
on a bad day.
Using the RGB [VGA] input, colors are way off. Would not be useable as a
monitor.
I removed the back and my ESR found no bad caps. No obvious failures.
This is problem too subtle for me.
Any hints on how to proceed?
Thanks.
 
OK. I figured out how to access the factory service menu [this model: while
in menu press vol- and input].
All of the color settings and offsets were near maximum for all temperature
choices. The standard "reset" of settings did not effect these. Lowering
them significantly made a big difference. Still not a great set but could
now function as a monitor and is suitable for TV.

"John Keiser" <john.keiser2@hawaiiantel.net> wrote in message
news:SOmdnWjrPsAdBjfNnZ2dnUVZ_r-dnZ2d@powerusenet.com...
Neighbor's TV. Complaint of poor image quality.
I fixed her Dell LCD monitor, replacing a few caps and a driver so she
hopes I can help her again.
Powers on, sound is fine. Image is stable but quality is noticeably poor.
Using the cable input, factory default settings are washed out.
Custom settings work but best balance between brightness and contrast
still leaves a lot be be desired. The quality might be described as an
old CRT TV on a bad day.
Using the RGB [VGA] input, colors are way off. Would not be useable as a
monitor.
I removed the back and my ESR found no bad caps. No obvious failures.
This is problem too subtle for me.
Any hints on how to proceed?
Thanks.
Click to expand...
 
I used an Avia calibration CD to adjust settings. Worked OK.
But when used as a TV or as a monitor the "dynamic range" [for lack of a
better word] is restricted: if I crank up the brightness/contrast to reveal
darker features of a picture, the light background is washed out. [I.e, to
see details of Yahoo photo of dark seats in an airplane, the background
words fade out. Or vica versa.]
Maybe this is as good it as it ever was but I doubt it. My neighbor can use
this not knowing better but I wouldn't enjoy it myself.
There are no more setting for me to tweak, that I know of.
Any idea of how to improve?
Thanks.
..
"John Keiser" <john.keiser2@hawaiiantel.net> wrote in message
news:SOmdnWjrPsAdBjfNnZ2dnUVZ_r-dnZ2d@powerusenet.com...
Neighbor's TV. Complaint of poor image quality.
I fixed her Dell LCD monitor, replacing a few caps and a driver so she
hopes I can help her again.
Powers on, sound is fine. Image is stable but quality is noticeably poor.
Using the cable input, factory default settings are washed out.
Custom settings work but best balance between brightness and contrast
still leaves a lot be be desired. The quality might be described as an
old CRT TV on a bad day.
Using the RGB [VGA] input, colors are way off. Would not be useable as a
monitor.
I removed the back and my ESR found no bad caps. No obvious failures.
This is problem too subtle for me.
Any hints on how to proceed?
Thanks.
Click to expand...
 
The specs say this model has a "700:1" contrast ratio.
Does that explain anything?


"John Keiser" <john.keiser2@hawaiiantel.net> wrote in message
news:SOmdnWjrPsAdBjfNnZ2dnUVZ_r-dnZ2d@powerusenet.com...
Neighbor's TV. Complaint of poor image quality.
I fixed her Dell LCD monitor, replacing a few caps and a driver so she
hopes I can help her again.
Powers on, sound is fine. Image is stable but quality is noticeably poor.
Using the cable input, factory default settings are washed out.
Custom settings work but best balance between brightness and contrast
still leaves a lot be be desired. The quality might be described as an
old CRT TV on a bad day.
Using the RGB [VGA] input, colors are way off. Would not be useable as a
monitor.
I removed the back and my ESR found no bad caps. No obvious failures.
This is problem too subtle for me.
Any hints on how to proceed?
Thanks.
Click to expand...
 
On Nov 20, 2:23 pm, "John Keiser" <john.keis...@hawaiiantel.net>
wrote:
The specs say this model has a "700:1" contrast ratio.
Does that explain anything?

"John Keiser" <john.keis...@hawaiiantel.net> wrote in message

news:SOmdnWjrPsAdBjfNnZ2dnUVZ_r-dnZ2d@powerusenet.com...



Neighbor's TV.  Complaint of poor image quality.
I fixed her Dell LCD monitor, replacing a few caps and a driver so she
hopes I can help her again.
Powers on, sound is fine.  Image is stable but quality is noticeably poor.
Using the cable input, factory default settings are washed out.
Custom settings work but best balance between brightness and contrast
still leaves a lot be be desired.  The quality might be described as an
old CRT TV on a bad day.
Using the RGB [VGA] input, colors are way off.  Would not be useable as a
monitor.
I removed the back and my ESR found no bad caps.  No obvious failures..
This is problem too subtle for me.
Any hints on how to proceed?
Thanks.- Hide quoted text -

- Show quoted text -
Click to expand...
maybe, that's a very low number compared to what most sets claim.
 
My neighbor seems happy but her sight is not so good.
This model got very nice reviews for a clear, hi res picture. Personally, I
think something is still wrong when I compare to my normal PC monitor or LED
TV. But it is beyond my abilities to figure out how everything functions
"almost" perfectly but leaves the quality slightly deficient.
Total failure mode can be easier in that regard.
If anyone has any idea what would cause diminished dynamic range, please
post.
Thanks.


"hr(bob) hofmann@att.net" <hrhofmann@att.net> wrote in message
news:2fcdfc9a-f222-4278-8b0b-3971daf96dc6@h9g2000yqd.googlegroups.com...
On Nov 20, 2:23 pm, "John Keiser" <john.keis...@hawaiiantel.net>
wrote:
The specs say this model has a "700:1" contrast ratio.
Does that explain anything?

"John Keiser" <john.keis...@hawaiiantel.net> wrote in message

news:SOmdnWjrPsAdBjfNnZ2dnUVZ_r-dnZ2d@powerusenet.com...



Neighbor's TV. Complaint of poor image quality.
I fixed her Dell LCD monitor, replacing a few caps and a driver so she
hopes I can help her again.
Powers on, sound is fine. Image is stable but quality is noticeably
poor.
Using the cable input, factory default settings are washed out.
Custom settings work but best balance between brightness and contrast
still leaves a lot be be desired. The quality might be described as an
old CRT TV on a bad day.
Using the RGB [VGA] input, colors are way off. Would not be useable as a
monitor.
I removed the back and my ESR found no bad caps. No obvious failures.
This is problem too subtle for me.
Any hints on how to proceed?
Thanks.- Hide quoted text -

- Show quoted text -
Click to expand...
maybe, that's a very low number compared to what most sets claim.
 
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