Is it the same two loco's that have been "lost" on the two HC's?
Have they disappeared from the select screen (with the loco icons) and the loco list screen (where you use the knob to scroll through the loco's)?
Can you remember doing anything like deleting pictures, making changes, doing updates when the loco's disappeared?
As the find product procedure doesn't find them that means they do exist on the HC still. I don't think accidentality password protecting them would loose them from the list Ultimately, if we can't work out what happened you many need to remove all the detected products from the HC and re-detect everything.
- Tim