This is from an earlier post
http://www.avforums.com/forums/showthread.php?t=181602&page=1&pp=15
[Getting to service menu]
Instructions below: 'key' means button on the remote; 'option' menas choice from on-screen menu
Go to 'easy menu'.
Select the 'reset' option (near the bottom)
Press key '->' (right arrow)
Press key and release key 'reset'. [NB this will not reset any of your settings]
Press and hold key 'reset' for about 5 seconds.
Copy down what appears on screen
When you've finished, press 'menu' to get rid of it, and then next time you press 'menu' you're back to 'easy menu')
[Adjusting vb. Some have said that this affects the warranty. I don't know]
I let the pj warm up for a good while (watched "Last Samurai" which I really enjoyed and would recommend). Maybe that's a bit long for a warm-up though - other folks recommend half an hour.
First I used VCOM first to minimise flickering (no flicker apparent afterwards)
Then NRSH to attempt to minimise the bands I could see. For low values the bands were white, and for high values they were black (or maybe vice-versa). For some mid-values, mostly about 180-220 though different for each colour, the bands were minimised as much as possible.
Then STRIPE. I had to get my eyes used to this, and sit quite close to the screen (about 40" away for a 70" diagonal sort of) with all other lights off.
For each colour, for each brightness group (0 to 4), I played with the values. Too high and white bands appear. Too low and black bands. In the middle and they mostly disappear. You'll see what to look for when you deliberately adjust the values badly - e.g. make it too high and the particular stripe is visible then as white, and you can watch it disappear and reappear as black when you reduce the value. Then you can slowly go back and find the middle value which minimises it. For some brightness groups the stripes appear in the darker bars, and for some brightness groups I found them in the brighter bars.
Red and green benefitted most from tweaking, blue much less so (and blue was really hard to do ).
Then back to NRSH just to see if a further round would help.
I've got it much better now - I can't be sure that I can see it at all in the foggy forest or smokey gun battles in "last samurai". I can even watch most( ) of "master and commander" without seeing vb . Where I think I can see it is when the mate(?) first uses a telescope to look for the Acheron in the fog bank.
I think I'm quite picky about this. I'd love to see someone else's projector though to see if mine is a horror or quite good now in comparison.
I hope this helps