Performs very well for a while (say 1-2hrs) then screen goes black (a thin red,green blue line shrinks to a pinpoint in about 1-2secs then only sound. Audio plays well. If I turn it off for 15-20 minutes it's fine. Seems more frequent the warmer the ambient room temp.
Also I have a convergence problem that I can "fix" with a light tap (no kidding "light tap") to the side. The convergence problem goes away the longer the set has been on (say 20-30 minutes).
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Re: No Picture after it's been on a while. Audio OK.
Ok you have a vert sweep problem and yes its probably connected to in a way to the "tap and fix" problem! Seems to be n intermittant connection on the vertical out put Ic or maybe even on the rgb convergence ic?? The total loss of sweep though tells me that theres two differant problems! Maybe and intemittant connection on the vert output Ic as well as bad connections on the convergence ic??.
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Vertical scan section circuit fault. Check and replace damaged component/s at its vertical scan output section circuit. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/
Check the connecting cable to display paned and its T'Con board [LVDS cable] for any loose contact with its either end sockets. Reseat it once and check. If you wish to get more details, http://electronicshelponline.blogspot.com/ Pull up previous posts there, either by type
in the model name to your set in its search box, or view it in Timeslide
More info would be nice. Are you using HDMI or Component cables. If it is component cables (red, blue, green for video white and red for audio) Check your red and blue connection. Green alone will give you a black and white picture. If you are using an HDMI cable, replace the cable to see if this changes anything or if you have another tv swap cables to see if problem stays with tv or moves to another tv.
It has been my experience with Sonys that those three colored lines indicate that the set is having trouble with the data communication lines. The hitch is that a model as complex as that one has as many as five seperate clock/data lines and if any one of them goes down the set will exhibit your symptom. It will take a professional to track down which line is causing the problem. I've seen audio output IC's as well as tuners cause the problem.
I f these lines are slightly diagonal and they all showed up at the same time. you probaly have an open resistor in the ABL circuit. since your set is 13 yrs old, I would not put a penny into it.
You might take the front grill cover off and the panel behind it and find the little black box with 6 little controls 3 are for focus 3 are for screen turn the screen ones ever so slightly counter clock wise. the control in the middle is the green screen adjustment. If the green line goes away try the one labeled r for red and b for blue.