My 7in screen went to the coloured vertical lines and gone to black again. it has been running fine since I received a replacement but yesterday while doing some engine running it rebooted then came back with the lines and now has stopped working. I have tested it with a test lead and the power light is on, at the back near the ethernet connection, This is a very frustrating experience as I am nearly ready to close the lid on my RV. The 10in is working OK. help.....Hugh