Several ways to handle chassis
GOOD
Remove legs if it has them. they either unscrew or twist off. Put the
set on its side & remove all but one rear chassis bolt. The chassis will swing out to work on.
BETTER
Same idea. Put TV on bench upright with a few feet behind it. Find a box
about the same HGT, pull chassis & flip out onto box.
BEST
A test jig but you dont have one !
BTW the purity will be way off while on its side running. Also just
be sure you dont pull wires too tight. Take it slow.
73 Zeno
LFOD !