My optoma ep771 projector, which i can't easily access right now since it's installed in our art gallery (very tall) ceiling. i think the bulb is out but i'm not sure. the light flashing situation is this: green ("power") = flashing 5 times orange ("lamp")= flashing 4 times can you verify that the lamp is out with this blinking

the color wheel is wrong,replace it
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Jerry Zhong (China)
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Function button left corner bottom of laptop keypad and f8

Probably FN and F5 key or whichever key controls your display routing.

Yes, if bulb was low price and was installed in old lamp casing then it is bulb that is not good and creating too much heat that exhaust fan can't throw out to make projector cool enough so temp sensor activates and send over heat signal to system control chip thus projector shuts down.
Please install original lamp that comes with casing to solve this issue.
If lamp was original then check exhaust fan that might be running slowly due to stiffness in bearing so temp sensor finds over temp in projector.
Hope these info will help you.
Thanks.

I have a 2 inch white line down the middle of the screen from my Infocus DPL projector.
Can you help?
Paul.

go into the settings in the menu. there should be a setting for resolution.

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try activating the output of the laptop:

It's not a short, the blub is near the end of it's life ~ the optoma is designed to detect when the blub is about to blow and shuts itself down. Turning the projector upside down or right side up usually only gives you a brief reprieve (some have reported a modest amount of extra time gained) on the blub ~ but in the end it's on it's way out and the projector will shut down again.