Any ideas on what the issue could be? Is it something that's for sure on the monitor side, or could it be something else? If it's for the sure the monitor, I have someone an hour-half away who might look at it. But I don't want to bother him if it isn't a monitor issue.
Here is the typical terminology so you don't confuse yourself or anyone else:
Chassis = The board sitting under the tube. (ie G07)
Tube = The glass tube with the screen
Frame = The metal that holds the chassis and tube together.
Monitor = Chassis + Tube + Frame
Without knowing what you are doing, then you don't even know where to start. There is nothing wrong with this but it's going to make it very hard for you to figure this out without spare parts to swap in.
You need to start do a process of elimination.
You either (or all) of the following to help narrow this down.
- Tube rejuvenator/tester
- Known-working spare chassis
- Known-working spare tube
Unless someone here wants to confirm that your tube is 100% working then you need to ether buy (and swap-in) and known working chassis. But I'm not going to die on the hill and say your tube is 100% working.
The other option is to send the chassis out to someone like
@paul400 and he can service it for you. But the gamble there is that there isn't anything wrong with your chassis and the problem is actually your tube.
Then you have spent time and money getting your chassis fixed but the problem is actually your tube.
Where are you located? Maybe someone nearby could test your tube for you and then at least you could be sure the problem is your chassis.
Again, there are other things you could start testing on the chassis but it would require a multimeter and some confidence that you know what you are doing. Plus help from G07 experts on here.