I'm a first-time projector owner that jumped on the refurb 4805 deal last week, but I've been following the forum and contemplating a purchase for a long time. I just got the projector yesterday and hooked it up to my laptop for a simple test. Some information first:
1) The unit appears to be like-new. No visible signs of usage. Menu shows 0 hours on the lamp.
2) Firmware revision is 1.1.3
3) The laptop screen resolution is 800x600, connected via the enclosed VGA-to-M1 cable.
I just projected the image to a wall for the first checkout, but even so I was wowed by the clarity and vividness of the picture. However I did notice one problem: The right 1/3 of the screen shows a slight image distortion. The best I can describe it is as rising smoke or rolling clouds, moving from the bottom to the top of the screen. It is faint but noticeable to me, my wife didn't see it at all until I spend a couple of minutes pointing it out to her. Am I experiencing this (from the FAQ):
7.07. I'm noticing a slight pulsing in my picture, what is wrong?
Not to be confused with lamp flicker, for more information on lamp flicker, click here:
There seems to be an issue with the 1.13 and 1.21 firmwares on the 4805. Every now and then while watching on the 4805, there will be some slight strobe-like pulsings in the picture, some people notice it more than others and it seems to vary on anything that you watch, and is most noticeable in darker scenes.
The only solution to get rid of this issue is to revert to the original firmware that you can download here:
InFocus is aware of this problem and is working hard to fix this. There seems to be a fix for this and is going internal testing as we speak Hopefully it will be available in its next firmware update.
If this is something that can be fixed with an upcoming firmware upgrade, I'll hang on the the 4805, otherwise I'll try to send it back for a replacement.