Please post a photo of the machine with door open, showing the screen.
The machine plays still, even with the black screen correct?
It could be a power supply issue within the CRT itself. I'm assuming you never replaced it with an LCD?
These are some of the things needed for the experts here to help you.

(not me!)
Finally - BE VERY CAREFUL around the CRT when troubleshooting. You can get a potentially
LETHAL SHOCK

even if the machine is unplugged as the CRT will hold electricity for days.
This can be done safely with a few precautions. The guys will guide you!