When i power on the cab i hear the classic snooze sound from the crt that let me to think the sanwa tube is not totally dead (?) but i receive no picture and the tube itself remain total black (no gray or something else that put me in direction of thinking that is correctly powered).
Initially i hear and see spike (!) from the cup on the tube regularly on all powercycle, but after discharging the flyback and clean the tube and the cup itself I DON'T have this issue anymore. Naturally the naomi1 vga output is good (tested on vga lcd monitor).
MY skills on crt are very poor, but not totally bad on low voltage circuits and pcb... So i need an help that put me in the right direction to go on on this case.
I have a fresh new compatible flyback too (bsc24-0107), JUST in case it's needed to SUCCESFULLY complete the job.
Experts... Please... Can you give me an Hope?
P. S. I see some light on tube filament(s) in a black room condition (maybe the neck of the tube is not totally depowered (?)