Do you have a signal to it ? Did you hear the HV crackle and come up ? Do the internal test patterns display ? Do you know the settings of your G2 and Drive values ? Are the tubes turned off (Push Color,8 I think to turn them all on).
Is the unit on a ceiling? If so, power off and try reseating the horizontal sweep board, it is mounted in a metal sleeve between the green and blue tubes. Try also building a shim with some layers of electrical tape in the metal cap for that sleeve, to hold the board up into it's connector firmly.
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