Recently had the required software upgrade to 3.2 on our 430 W unit.
After the software instalation the display was very bad, ghost images and very grainy.
Turns out the software sometimes messes up the automatic contrast settings. Fix was very simple. Go to Aux page, go to Display, highlight contast, select auto, highlight the LVL and turn the numbers till the picture gets good again.
Just thought I would pass along the info