Green Screen

[bob_26]

About 3 weeks ago while watching tv, the picture went green with lines
running across the screens. I couldnt change the channel, there was no
volume and only thing I could do was switch it off. After about 20
minutes the picture came back on and it was fine.....

Until tonight. Again same thing happened but this time it hasent fixed
itself. From reading other posts it goes on about CRT drive. Can anyone
clarify if this is the problem?

 

[Art]

Irish Spasms with the generic display? What is it you are watching, Model,
Make, chassis #, and any actual diagnostics you may have done.

 

[[email protected]]

About 3 weeks ago while watching tv, the picture went green with lines
running across the screens. I couldnt change the channel, there was no
volume and only thing I could do was switch it off. After about 20
minutes the picture came back on and it was fine.....

Until tonight. Again same thing happened but this time it hasent fixed
itself. From reading other posts it goes on about CRT drive. Can anyone
clarify if this is the problem?

Youve got deeper problems that that. But as usual with vague
information...


NT

 

[David Naylor]

About 3 weeks ago while watching tv, the picture went green with lines
running across the screens. I couldnt change the channel, there was no
volume and only thing I could do was switch it off. After about 20
minutes the picture came back on and it was fine.....

Until tonight. Again same thing happened but this time it hasent fixed
itself. From reading other posts it goes on about CRT drive. Can anyone
clarify if this is the problem?

Depending on what model , the problem is most likely the video amp chip
on the CRT board, or hopfully not the CRT itself has and intermetant
short. try tapping litly on the neck of the tube while the set is on and
see if the problem appears. if so then the tube is the culbrit, if not
then change out the video amp chip... if the set hhas three seperate
transistor and amps the look at the back of the crt board for the
letters GK then trace the lands back to the transistor and replace it
Have fun tell us what model it is and we can be more specific

 

[[email protected]]

bob_26 wrote:

Depending on what model , the problem is most likely the video amp chip
on the CRT board, or hopfully not the CRT itself has and intermetant
short. try tapping litly on the neck of the tube while the set is on and
see if the problem appears.

a great way to electrocute the OP


NT

 

[Farmer Giles]

a great way to electrocute the OP

Nonsense. Lightly tapping the neck of the CRT won't hurt the OP or the
CRT. A better way to narrow down the area of the is fault, though, would
be to swop over the CRT drives - for example swop over the green and
blue. If the screen still flashes green then the CRT is faulty, if blue
then there is a problem in the video circuitry. I'm not familiar with
this model, so can't be more specific than that I'm afraid.

HTH

 

[[email protected]]

Nonsense. Lightly tapping the neck of the CRT won't hurt the OP or the
CRT.

The risks of advising people to stick their hands inside a TV could
hardly be more obvious.


NT

 

[Farmer Giles]

The risks of advising people to stick their hands inside a TV could
hardly be more obvious.

You are correct, and I apologise. I was assuming that he knew his way
around this sort of equipment - a dangerous assumption!

 

[[email protected]]

You are correct, and I apologise. I was assuming that he knew his way
around this sort of equipment - a dangerous assumption!

Hopefully he does, and theres no problem. Or maybe thats why so many
OPs never answer the questions asked of them


NT

 

[junexsils]

[]About 3 weeks ago while watching tv, the picture went green wit
lines
running across the screens. I couldnt change the channel, there was no
volume and only thing I could do was switch it off. After about 20
minutes the picture came back on and it was fine.....

Until tonight. Again same thing happened but this time it hasent fixed
itself. From reading other posts it goes on about CRT drive. Ca
anyone
clarify if this is the problem?[


color drive transistor in the cr
socket is bad.i have the same problem as you have few months ago.and
fixed it by replacing the transistor.check the voltage under green

 

[Mark D. Zacharias]

[]About 3 weeks ago while watching tv, the picture went green with
lines
running across the screens. I couldnt change the channel, there was no
volume and only thing I could do was switch it off. After about 20
minutes the picture came back on and it was fine.....

Until tonight. Again same thing happened but this time it hasent fixed
itself. From reading other posts it goes on about CRT drive. Can
anyone
clarify if this is the problem?[



color drive transistor in the crt
socket is bad.i have the same problem as you have few months ago.and
i fixed it by replacing the transistor.check the voltage under green.

Could be the socket, the drive transistor, a solder connection, or the crt
itself shorting internally heater to cathode.

Mark Z.