[MrFixr55]

Yes, it will, think of testing the spark on a lawn mower or car. Do remember to GROUND the screwdriver shaft to the Chassis! and use a screwdriver with a rubber handle and that the shaft does not extend out the back of the screwdriver. Don't directly touch the anode clip, but if the circuit is good, you should get a nice blue spark at between 1/4" and 1/2". If no spark, shut down and perform the same test at the plate cap of the HV Rectifier in the cage. Again, BE CAREFUL! Use the 1 hand in the pocket technique and ensure that the screwdriver is well grounded to the chassis.

Early Television Museum has a very short guide on working on TVs which may be helpful:
https://www.earlytelevision.org/restoration_advice.html