Panasonic GAOO TV

Question

We have a Panasonic GAOO TV; Model CT-35xf23cu. Recently it started getting horizontal lines across the picture. When we gently tap it on the side or back it works for a while. Seems that the vertical section is either loose or dirty. Need to know where it is located so that I can spray some contact cleaner. also need advice to safely discharge the high voltage from the CRT. A schematic would also be appreciated.

Thanks.

Ken