It probably has the same DLP chip as my Mitsubishi television. The mirrors in the chip set get stuck and create the white spots. There is no way to fix this other than replacing the DLP chip.
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https://esupportdownload.benq.com > UserManual
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Download Dual screen driver from BenQ website. 2 Surface Setup. 3 Camera Installation on Projector( please refer to corresponding PointWrite User Manual).
https://esupportdownload.benq.com > UserManual
PDF
To link to the Projector Network Display System web page, click Link. 5. Disconnect. To disconnect from the projector(s), click the Disconnect icon.
https://www.benq.com > en-us > education > edtech-blog
1. Use a cable. The simplest, most common way to use Microsoft Office files on your BenQ Board is to connect your laptop using an HDMI or USB-C cable. · 2. Use ...
Sorry I don't really have an answer I had the same issue with a Sanyo I had to keep putting back the old lamp and getting it to start on that one then shut down and swap, eventually it worked, it was a pain. in the end I bought an led projector for the price of a new lamp for the old one
Presuming it is a Benq? Moved Question to Benq from Televisions category.
Lots of references to the section in the manual, but nothing to tell you how to fix it! Seems like it doesn't understand the date being fed to it. Contact Benq Support.
https://www.google.com/search?q=%22Scaler+shutdown+fail%22
Please include 'make model (what it is)', in all questions.