Repairing CRT screens is no longer cost-effective. The handful of people that still know what they are doing will just charge you an arm and leg to repair this crap. And unless you have alot of electronic repair technician experience I’d strongly suggest against doing it yourself.

While most CRTs have bleeder resistors to make sure that the residual charge in the capacitors are drained quickly those can always fail and you could be tinkering around with a CRT that has relatively high residual voltage.