Question about Acer Professional P211 21" CRT Monitor

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Acer AL2216W I just got an Acer AL2216W LCD monitor and a Diablotek video adapter with ATI's Radeon 9550 chip set. I throw a switch to supply power to my Dell GX400 Optiplex and Acer AL2216W simultaneously. The switch is installed between the computer and monitor and an APC Back UPS 750 battery backup unit which is left on 24/7. The pilot light on the Acer monitor comes on immediately but I still have to manually push the button on the computer to start it. So the Acer monitor is already powered up when the computer boots. When done this way the Acer monitor has a bizarre look that makes the display almost unreadable with vertical lines about 3/4" apart and mostly what looks like noise. I shut down everything and I turned the monitor off with it's switch. I then powered up the computer waited 5 seconds or so and then turned on the monitor. Now everything worked fine. I sent one Acer AL2216W back that had the same problem. I called Acer and asked if there was a need to power up the monitor and computer in a particular order and was told no there wasn't. I was also told that this isn't a known issue.

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