Michele Smith writes:

Hi. I have a b/w monitor that has a rolling wave than travels from the
bottom to the top after it has been turned on for a few minutes. Thanks.
Mark.

If it's running at an NTSC scan rate and the wave has a period of about
15 seconds, it's probably a bad power supply filter capacitor or 60 Hz
getting into the video.

--- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
+Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
| Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

Note: These links are hopefully temporary until we can sort out the excessive
traffic on Repairfaq.org.

Important: Anything sent to the email address in the message header is ignored.
To contact me, please use the feedback form on the S.E.R FAQ Web sites.