Initially I would check the capacitors in the high voltage circuit associated with the CRT tube.
Given the age of the TV they may have deteriorated some what.
The CRT tube operates a high voltage so be careful that you don't touch the tube connectors as it is one big capacitor ;-)
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Here's a [https://www.worldradiohistory.com/Archive-Company-Publications/GE-Techni-Talk/GE-Tele-Clues.pdf|guide] that may help as it shows the valve layout of your type of TV, but more importantly the schematics which have the voltage test point values shown on it - see ''MM Chassis details'' on p.71→p.72 (of 176 pdf)
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Here's a [link|https://www.worldradiohistory.com/Archive-Company-Publications/GE-Techni-Talk/GE-Tele-Clues.pdf|guide] that may help as it shows the valve layout of your type of TV and more importantly the schematics which have the voltage test point values shown on it - see ''MM Chassis details'' on p.71→p.72 (of 176 pdf)
Hi @mjjeverything
Initially I would check the capacitors in the high voltage circuit associated with the CRT tube.
Given the age of the TV they may have deteriorated some what.
The CRT tube operates a high voltage so be careful that you don't touch the tube connectors as it is one big capacitor ;-)
Here's a [https://www.worldradiohistory.com/Archive-Company-Publications/GE-Techni-Talk/GE-Tele-Clues.pdf|guide] that may help as it shows the valve layout of your type of TV, but more importantly the schematics which have the voltage test point values shown on it - see ''MM Chassis details'' on p.71→p.72 (of 176 pdf)