No coulor on play with akai VCR vs245s

[DrMcKay]

Hello!
I've fixed my VCR, but the colour works some times or not.
I suscpect a capacitor 4700µF, because I've changed all capacitor but not this 4700µF (not in stock at the Store)
And, I can't see Channel, I suppose that the tunner doesn't suplied, and I don't erase any K7 & no record.
Help me please, to fixed this list of faults.

I suspect again few TR
THX