We can fix monitors and will bill according to you current charge rate, per hour. Sometimes a fix is easy or obvious. Normally, as with all electronic equipment, we will need to get a schematic and, or, service manual. In many cases though, we or someone else may all ready have this documentation. This, and parts, and labor can quickly add up.
Most common parts are inexpensive.
Tubes and flybacks can be expensive. We can not guarantee what the total price outcome will be. Another option is to use one of the computer monitor repair houses which specialize in monitor repair. They will have the resources and material which enables them to charge very little normally. Your monitor would have to be packed up and shipped out.