wrote in message
oups.com...
Got A view sonic moniter A70F that the picture is sharp as can be.
about 45sec later at the snap of a finger way out of focus. then about
a min later sharp as can be again. instant out and in of focus. does
this cold or hot all day. not a bad solder joint for hitting/tapping
the moniter does nothing. not a slow drift its instent. any clue???. I
would like to fix it not buy a new one. any clue Guys.

Thanks for any help or idea you guys may have.

DAVE


Probably either a bad flyback transformer or bad tube.