Almost always its best to take it SLOW & in order. More like a repair.
1) power supply
2) hoz osc & output.
3) HV
Now you have a raster & can evaluate the set At this point it is
often working pretty good !
4) vert
5) video detector & output.
6) tuner & IF
7) audio.
At this point if everything looks good restore it.
Do a few caps at a time. RETEST as you go & watch for changes. An
example is you change a few caps. Then the hoz osc goes nuts. Only a few
places to check for mistakes, not 20 places. In reality often you fixed it.
A cap was drifting over the yrs & the tech has been compensating for it.
Now the new cap is the right value. VERY common especially in the hoz osc !
enuf fer now
Zeno
LFOD !