Found this on the side of I-840 today, Magnavox console tv.

[zeno]

Unhook the C of the HOT & see if the voltage comes up. Also
do the heat test of the HOT.
Dont forget you are working with 3 grounds on this set.
Hot gnd for the primary of the PS
Cold ground the chassis ground / PS secondary.
I dont think this one does but some sets also had another ground for the
hoz osc/out.
CRT ground. Most NAPs do NOT ground the CRT dag as normal sets.
We used to just grab the CRT ground but that dont work on these.

73 Zeno
LFOD !