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Possibly either of 2 reasons:
1. Your player is not sending any signal to the Optima meaning it is the one in question and not the projector; or
2. Your Optima lost its input signal, go through the signal source selection menu, try manual selection & set it to where your source/player is connected.
Hope this works out for you, if not pls post again . Good luck and kind regards.
Please check your port with another source to confirm the working of the PC. Now also try to see if the projector connects with another PC. This will confirm the culprit as it is possible that there is a signal mismatch to the source input and hence not detected.
The projector looks for Horizontal sync & Vertical sync signals from the VGA source. If it finds these signals only then the source is connected. Even if the sync signals are found, the RGB switching should be working. Either there is a problem in sync circuitry or RGB switching. You need to be well conversant with the circuitry.
First, you need to verify that you have an HD source (720p, 1080i) connected to your M1-DA port or RGB component video ports.
S-Video and Composite video inputs are not capable of providing a 1080 signal. Then, in the menu, go to settings and then select "Sources". Verify that the source you want to use is checked and enabled. Once you exit the menu, perss source on the keypad until your selection shows up. If you have a good signal, it will sync up and display your program. To verify what signal you are watching, go back into the main menu and select "About" It will show which source you are using and what the format is.
It appears the projector was over heating. Why it affected the DVD signal and not the computer signal, I do not know. The other confusing thing was the projector was hanging off the ceiling and should have had plenty of circulation. When I climbed up to check for excessive dust, I found that the lens cap had been placed over the intake vent. I blew off the dust and removed the cap. After running the projector for an hour, it appears that the problem has been solved.
Could be a few things....first you need to isolate a signal source issue or a faulty LED lamp. Simply unplug your signal source and run the menus on the projector.
Purple Gone with source unplugged = faulty source our signal
Purple still there = faulty device
Sounds crazy but make sure you have no interference devices running real close within say 2 feet. cell phone, microwave, magnets, high voltage eletricity...etc