magnavox , HELP!!!!

[radotvguy]

Ok guys , i am kinda new as i said once before to tvs . Basically i fooled with radios and some small b/w tvs a few times . Anyhow , i got a 1965 magnavox color roundie . Heres my question . Should the electrolytic metal can caps be changed on these ???? . It looks like someone tacked in another cap to one of the cans becuase of a problem at one time ??? . Is is advisable to remove the cans and replaced them with three electrolytics with ground side , grounded to chassis or should i have special cans ordered???

Next question is , i wasgetting buzzing lines across the screen last night , then i got a bunch of green retrace lines on the screen and a hissing noise from the crt . Can anyone shed some light on this and tell me where to start to look . All tubes are good , all controls are clean and seem to be working , all mylar caps tested ok too . Not sure where to look at this point . Replaced two bad electrotytics i found also .