my older tv picture keeps bouncing

Check the solder connections in the vertical deflection circuit. If you see any questionable ones, remove the old solder and apply new. Do not just reheat, as this can multiply your problems. If the set used lead-alloy solder, you must use the same type solder. Do NOT mix lead-free solder with older lead solder. There is a ninety percent chance that the problem is cracked solder joints. The remaining 10% will be intermittent Electrolytic Caps, intermittent Transistor junctions (This will usually cause total loss of deflection), hair-line fractures in circuit board trace.

Good Luck.

Richard

May be as simple as using a long handled insulated screw driver and pressing on a few resistor trimpots to see if you fix/replicate the issue. Often the connection between the "carbon" film and the sliding metal contact can wear or corrode...pressing on all visible trimpots slightly while TV is on will reveal any problems associated. Make sure your screw driver is fully insulated as is also the metal shaft.

thx you all i know that the tv capacitors have high voltage so i unplugged my tv 1 year age before winter. i will go try this out. and let you know how it went. also how would i tell if the tv has lead-alloy solder or not? i do not have the tv manual.

also how would i tell if the tv has lead-alloy solder or not?

If the TV is 6-10 years old, it most likely has lead solder. As Techart said, you will want to use leaded solder to touch up any questionable looking solder joints. Good luck, and be careful inside the TV!

Tom