Question about ViewSonic PJ458D DLP Projector Multimedia Projector
You might need to turn off your computer .
then connect the data projector
and turn on data projector
then turn on computer
hopefully it detects the data projector is connected and switches windows to duplicate projection
On my P.C. F4 key in windows Switches the display manually to duplicate, alternate screen or pc screen only or projector screen only.
As I am not familiar with Apple this support article below might explain the switching of display outputs available on Apple Mac.
Posted on Mar 23, 2017
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Posted on Jan 02, 2017
My solution sounds dumb, I had the same issue. Took the lamp cover off the bottom. The screws were loose holding in the lamp. Maybe they heat and expand and eventually work their way out and the lamp doesn't make good contact. Just tightened mine up, the unit would power off after 45 minutes prior. Been on now for 5 hours, no trouble.
Posted on Feb 11, 2009
I think this is your laptops problem with putting out that on both displays at the same time try cloning or playing with those settings
Posted on Mar 10, 2009
proable solution the cooling fan is giving problems. the whistling sound most likely is fan rubbing on a wire??? The unit gets over heated and turns off for protection. Good luck
Posted on Aug 19, 2009
SOURCE: Projector not working with Imac
Please visit below URL and download viewsonic projecter drivers for your Imac.
Posted on Mar 26, 2010
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