I am new here, and this seemed the place to post a problem.
I have an almost 4-year-old LG PA70G that has seen roughly just 100 hours of use. It is always stored in its original box, inside its nylon bag, and the only handling is carrying it from home to my workplace. It has never been roughly handled or dropped; the lens is just fine.
Last prior use was 6 weeks ago for a presentation without problem. Looked and sounded great. Afterwards it lay dormant until today when I had to use it again for another presentation.
But upon start-up today, the projection was speckled with sandy dots, typically more dense in white areas. (See attached photos.) This isn't the projection surface, it isn't the lens. I could watch a video from a UBS stick and the video moved normally and the sound was just fine; all menus work just fine, too. But the image is always speckled with dotty, sandy bits. (Via HDMI my laptop's screen image was also speckled.) The LG logo is disrupted; it says "No Signal" underneath, but the signal is not the problem — remember, any video motion and sound worked fine.
I turned the device on and off a number of times, and reconnected the USB stick or HDMI cable a few times, too. No change. The image is always speckled.
Any thoughts? Could some internal software need reinstallation? Could a faulty hardware circuit cause this? Any advice would be appreciated. This device is out of warranty, but for a LCD projector advertised with a 30,000-hour illumination lifespan, it shouldn't have such a problem at 100 hours.