I picked up this unit second hand unit. There are some bright magenta marks that are vertically aligned in the centre of the screen. They look like drops of liquid but this is only visible when the unit is on. Is this likely something that needs to be cleaned inside the unit?
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Re: Marks on Screen
These are burn marks on one of the picture tube, probably the green one from the looks of your picture (the absence of green will leave red and blue)This happens as the result of some kind of previous failure, hopefully that has been repaired now. However the marks will always remain unless you replace the green picture tube which is costly and which is why they sold the tv. Sorry about the bad news, if you decide to have somebody replace the tube for you make sure they look for what burn't it in the first place it could be intermittant and waiting to happen again to your nice new tube. Although seeing what model this is this tv did like to do this when the convergence failed in which case it looks like that has been repaired already. Good Luck, hope you didn't pay too much for the TV.
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Hi Tommy yea that is usually a image unit problem. Looks like the drum is scratched up. I looked at the pictures looks like the cyan image unit is bad. Take them out carefully... and keep them away from light and you should be able to see that chip in the drum. Might be hard to see it. We sell those image units iteminconline you can also give us a call and we would be happy to help you.
hi from uk assume you have renewed c/belt and balance shaft timing belt? if so? and sure your timing marks on cams and the c/shaftcog are correct ? the oil pump also correctly aligned with marks? and the balance shaft gear also has time marking ? want to run thro how and which marks you have aligned and at TDC No1 all belt/s have to be aligned ??
You have to replace that small screen which is called wave guide.
If there is a sharp authorised service centre near to your place
you can buy the part from them. Do not work the oven without replacing
Hi Shailendrar , your problem sounds like vertical collapse , the whole picture has collapsed into a thin , very bright centre line ? maybe the result of dry solder joints , does banging on the side of the tv temporarily fix ? if so , the circuit board requires inspection for bad solder joints . Alternately the vertical chip/transistor may be blown , replace as required. Cheers T
I opened it up and could see nothing on the inside of the screen or on the mirror that would cause this. I cleaned the lenses, closed it up and the problem remains. A picture is attached.