The picture on my tv is too black and red. Sometimes the picture is pretty good but it always ends up with too much black and red that won't adjust out. Someone told me it's the picture tube and to trash it, but it has an okay picture sometimes, so I don't want to do that right away.
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Without seeing the lines I can't be sure what your set has wrong, but here are a some possibilities:
If the lines are lines are confined to the top inch or two of the screen and the picture looks otherwise normal, the trouble is bad capacitors in the vertical output circuit. Fixable by replacing the bad parts.
If diagonal lines are across the entire face of the picture tube and the picture looks washed out, the trouble is often a bad capacitor on the 200-volt line to the picture tube. This may be on the main circuit board near the horizontal output transformer, or on the small circuit board plugged onto the end of the picture tube. Again, replacing the bad capacitor can fix this.
If your TV is actually an RCA, someone may have bumped a rear-panel adjustment. On the back of the TV near the bottom right are two small knobs. RCA left these adjustments exposed inside of putting them inside the set like other manufacturers. These sometimes get bumped if someone was behind the set cleaning, or if a pet got back there and hit them with a tail. The top knob adjusts focus, and the bottom knob adjusts something called G2 or screen voltage. If this gets turned up too high it can cause the faded picture and diagonal white lines. Turn the adjustment down until a black screen looks black instead of gray.
A bad picture tube or horizontal output transformer can also cause lines through the picture. If this is the case with your set, it's time for a new TV. The transformer is relatively inexpensive but labor costs aren't, and the repair bill may exceed $200. If the tube is bad, there's no point even considering repair. The tube cost alone exceeds the cost of new TV.
Hopefully your lines are easy and cheap to fix. Good luck, and thanks for using Fixya!
You may have to resolder your vertical IC. This seems to be a common occurence for many Sony TVs. This is my first diagnosis when I get one of these in. But, yes there could be a bad ground almost anywhere. You will need to pull the board out and resolder any IC mounted on heatsinks and any large power resistor and resolder the pins connecting the flyback transformer to the board. This tip is always the first place to look for in repair. Good Luck and be mighty careful. Thanks for asking!
sounds like one of the tubes is gone. RGB stands for red green blue. These colours are mixed together to make all the other different colours on your tv's picture. when one goes then you end up with whats left working.If tv is fairly old chances are its cheaper to replace then to try getting fixed. tv's have came down drastically in price lately because of such high demand and competition to the market.
This should be a quick fix. Try resoldering the vertical IC. This is a small flat IC attached to a heat sink with about 11 pins. It should be marked LA7837 or something similar. That should resolve the problem.
Trimmer, you`ve narrowed it down to a certain section and your absolutely correct that it is a bad solder joint, there are 2 things you can do, first get a bright light and a magnifying glass and go over the bottom of the board and look for it, should be fairly obvious with the magnifier, if not go here and order a can of "Freeze mist" www.partstore.com this is a great "tool" for finding intermittents, it`s coolant in a spray can, have someone watch the screen while you spray in the area of the intermittent, when you hit the bad part the set will work, re-solder the part and any joints around it that look bad, end of problem, good luck with it, BMW Rider
Go to the video menu and turn the color control to minimum. Determine if you have a black & white picture or is it green & white. If the picture is greenish, you have a problem in the screen circuit or possibly a bad picture tube. If the black & white is ok then I would suspect a problem in the chroma circuit such as a bad video jungle IC or a crystal. However, because your set had a red blinking issue prior to your existing condition I would lean towards the picture tube as the source or your troubles. You can try a simple test to determine if you have an intermittant short . Take the back off the set, and with the insulated end of your screw driver, very very lightly tap on the neck of the picture tube near the socket. If you see green flashes or hear loud snaps in conjunction with your taps or the green tint goes away, chances are the tube is the cause. If so, you might try installing an isolation transformer on the picture tube. Good luck
The most common problem (I have fixed lots) is the Vertical amplifier has developed a loose connection. It probably just needs resoldering. As things expand it makes and looses connection you picture goes in and out. The vertical chip is a large black chip that gets hot, over time it degrades the solder until a connection is damaged. Most newer sets have a protection circuit that senses the lack of height, and shuts down the picture tube to save it. When the picture dropped to a line on older TVs and left that way too long it would burn a line into the face of the picture tube. You then had to have the picture tube replaced along with the vertical amp. it's kinda like a screensaver for your TV.