if an electrolytic cap was in backwards?

[jbivy]

So im slowly recapping a motorola tv, my soldering isnt great, so its slow going. A few caps were obviously replaced in the past and I found one, a yellow plastic .005-600 that was installed backwards. It was hooked to a 6au6 tube.

After getting this and checking the tubes on this and finding two dead ones, replacing them, i tried powering it on. The tubes lit up and i got the filament in the back of the crt was going. But no picture. So then i started recapping.

Could this replaced and backwards cap have been a major problem in why this tv ended up being retired from use?

again, sorry for the newby question. Just i think this shoddy repair could have been the culprit for this tv's demise.