"CMOS" wrote in message
ups.com...
thank you for all replies.

The VGA cards i used are different. im sure its not a problem in the
video card.
The fluctuation is not small. it about one inch !.

can that problem be repaired ?

thank you.
CMOS


Any problem can be repaired, from the sound of it it's a problem with the
high voltage regulation, though I'm puzzled by what you said about it being
the same on several new monitors.