The following has been posted for safety reasons only.
A few people like to tinker,but its not safe if your not familiar with stored voltages.
CRT tubes can store high voltage for months or even a year or more.
The probe on the crt must be grounded before tampering with the electronics.
This link will show you an easy and safe method of doing this.
“The journey is what brings us happiness not the destination.”
― Dan Millman, Way of the Peaceful Warrior: A Book That Changes Lives