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Hi, I have a brand new Optoma HD20 projector, brought from Amazon. Vertical lines appear across my screen during movie payback... the vertical lines persist ever when I do test pattern or switch to other sources. Only way to remove the lines is to power off. Cool down and restart the unit. I am using the projector in Singapore 230v, and aircondition is on at 26 degrees. Please advise what could be the problem.
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do the lines follow the same vertical pixel width from top to bottom or do they cross pixels? first try going into the menu and select auto-adjust. it just might be out of sync. you can adjust the resolution as well. if nothing changes, you might have a bad dmd (digital micromirror device). if that's the case and the projector is pretty old, replace the projector.
Hi miracles4all:
I solved HDMI signal issue in my Optoma HD20. In my case it was the lack of contact between the HDMI cable plug male ending and the Optoma HD20 HDMI female port. My 35ft cable plug male HDMI ending was not completely "seating" in the Optoma HD20 HDMI female port. I solved the problem by purchasing a HDMI female to female coupler and adding a 3ft HDMI cable that had a slim male ending. This 3ft HDMI extension cable made better contact to the Optoma HDMI port and the projector was immediately able to detect HDMI signal. Hope this helps you... kaufmanekpr
IF THERE IS WHITE VERTICAL LINES IN YOUR PROJECTION THEN REMOVE THE MOTHER BOARD AND REFIT THE BOARD OR U CAN JUST PRESS IT FROM UPPERSIDE THE PROBLEM WILL SOLVE OUT
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