ralphc@tekcae.tek.com (Ralph Carpenter) (11/29/89)
A good friend of mine has a THOMPSON 4375M multiscan monitor, made 2/87, hooked up to an IBM AT clone, that has some very mysterious behavior. The image "hops", almost like losing vertical synch, but not fully, about 2-3 times a minute. This behavior happens more as the monitor heats up, in both the 640x350 ega mode and 640x480 vga mode. However it is rock-solid when driven in the 800x600 mode by WordPerfect. He and I exchanged monitors to see if the problem was graphics card related, but it goes wherever the monitor goes. If anyone has *any* ideas, or like experience, please let me know. Thank you very much. Ralph Carpenter Tektronix, Inc.