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Sony KV-32FS320 - Weird problem

Hello,
I have a Sony KV-32FS320 which is about 2yrs old now. Of late I have
noticed a strange problem. Once in a while I will notice a flicker in
the whole picture. Now this "flicker" is not exactly noticable at all,
however I have noticed it a couple of times at different occassions. It
sometimes happens when I'm watching a DVD or even just TV. So I'm
thinking it might have to do with power. I have a basic power strip
connected to it. But thats what I had my thoughts on. Any ideas? Any
comments or suggestions would be appreciated. Thank you
 
R

Ray L. Volts

Jan 1, 1970
0
Hello,
I have a Sony KV-32FS320 which is about 2yrs old now. Of late I have
noticed a strange problem. Once in a while I will notice a flicker in
the whole picture. Now this "flicker" is not exactly noticable at all,
however I have noticed it a couple of times at different occassions. It
sometimes happens when I'm watching a DVD or even just TV. So I'm
thinking it might have to do with power. I have a basic power strip
connected to it. But thats what I had my thoughts on. Any ideas? Any
comments or suggestions would be appreciated. Thank you

If it's not an external (wall outlet or strip) supply problem, it's probably
arcing.

To check for arcing, turn the room lights off and the volume all the way
down. Watch through the TV's vent holes. You should see a brief, blue,
electrical discharge when the screen flickers. It'll also most likely be
audible to persons with healthy ears.
 
W

w_tom

Jan 1, 1970
0
If it is power, then it is in the walls or related to utility
service. There is no power strip that is going to 'solve' that
problem. However the list of suspects is long including antenna
reception or cable TV interference, an internal TV problem, or problem
unique to one station.

A flicker does not tell us much. An intermittent blanking of the
screen? Sudden appearance of snow? Loss of both picture and sound?
The verticle flips once - veticle hold (internally) required
adjustment. Failure of cable TV provider to properly earth cable to
electrical earth ground before it enters the building is just another
of a long list of possible problems. Or a wire in some wall receptacle
that is loose because it was pushed in the back and not wrapped around
the screw.

The number of reasons for your problem are quite long. Power is only
one possible answer. Meanwhile, a basic under $5 power strip with a
circuit breaker or a direct connection to wall receptacle is a best
source of cleanest power.
 
R

Ray L. Volts

Jan 1, 1970
0
w_tom said:
If it is power, then it is in the walls or related to utility
service. There is no power strip that is going to 'solve' that
problem. However the list of suspects is long including antenna
reception or cable TV interference, an internal TV problem, or problem
unique to one station.

A flicker does not tell us much. An intermittent blanking of the
screen? Sudden appearance of snow? Loss of both picture and sound?
The verticle flips once - veticle hold (internally) required
adjustment. Failure of cable TV provider to properly earth cable to
electrical earth ground before it enters the building is just another
of a long list of possible problems. Or a wire in some wall receptacle
that is loose because it was pushed in the back and not wrapped around
the screw.

The number of reasons for your problem are quite long. Power is only
one possible answer. Meanwhile, a basic under $5 power strip with a
circuit breaker or a direct connection to wall receptacle is a best
source of cleanest power.

Since the OP said it occurs sometimes when watching a DVD, and assuming the
DVD player isn't feeding the antenna input via RF modulator, we can rule out
the tuner and station as suspects. It's less likely an antenna cable,
either, for that matter.

The cause could, of course, be as simple as cold solder joints acting up
sporadically -- usually easily replicated by thumping, tapping, bumping or
shaking the set (certainly the pcb directly).

The OP might try connecting it directly to a different outlet to rule out
the one in question -- if it happens on all outlets, it's almost certainly
either the mains supply or the TV.

As for cleaner power, a "basic under $5" model aint gonna cut it. There are
much better alternatives which condition the line supply by filtering noise
and clamping surge/spike transients.
 
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