Apple Studio Display CRT 17" (green light o.k, but no picture)!!

[mac_junkie1]

hey guys,

i picked up a 17" CRT Apple Studio Display Blue monitor, and when i plug it in my blue G3 the green light comes on but theres no picture!!  i have a diffrent monitor on it and IT works flawlessly, so i dont know what the problem might be!!  i paid 30$ for this imac look alike :-) , but should've known, its from the salvation army!! if it doesnt work, i might just take the old CRT out and put in one from another monitor i have but, i dont know how to open the apple monitor without damaging it.  man its strangly put together, just like my bondi imac, which i had fun (sarcasim) taking apart trying to fix the non working speakers!!! man was that a challenge!!

hope someone out there can help me!!!  i really hope its a simple problem!!!