I have the horizontal lines issue on my DMG, and it is unclear if this issue can be resolved. Unfortunately, replacement reflective screens are not available unless you salvage one from another DMG, which is not ideal. You can get brand new backlit LCDs, which I admit would be advantageous in some situations, but backlit LCDs are difficult to see in direct sunlight. While I would like to see brand new reflective LCDs, I don't expect to see them because there isn't much of a market for them and no one is in the business of losing money.