I have updated two different HDS 7 Gen 2 units to 4.0 and none of them will display raster backgrounds (on maps from reefmaster) properly. The raster is not visible at all, only labels and depth curves. The background is yellow.
After some experimenting I found a workaround to the problem, if I set "photo overlay" to full and "photo overlay transparency" to 0, the raster background is visible again. This is not really a good workaround since default (after restart and/or changing SD-card) option on photo overlay setting is off?
Is this a bug in the v 4.0 software?