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sams covers how to check current should be between .75ma(bright) and 1.5ma(dark) IIRC.
you need to make sure the line is set to 117vac
have an HV prob to monitor CRT anode voltage
have an meter to monitor the cathode current of the Horz out
have an meter to monitor the current or voltage drop (where a resistor is used)on the shunt.
adj eff coil for dip on horz out coil (should be around 190-200ma)
adj voltage HV pot for 24kv on dark screen
check shunt currrent or V drop on 1k resistor look for 1.5ma dark .75 bright
if all this checks then HV is ok.
This is standard stuff that should be done anytime you put in new HV tubes (horz out/damper/shunt/HV rec).
if you are ok with this then post a pic of the problem. or better a video.
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