The control will have a number on it 63-#####-## usually.
Thats the Zenith part number. These sets are super common
& you should be able to find it. Any non remote 13" or 19" will
probably have something close if about the same age.
For now just take off the 2 power wires & mount a toggle switch
on the back somewheres. That way it runs & you can take your
time finding one.
73 Zeno
LFOD !