After sending it off to be checked I reinstalled a control PC to a hydrostatic tester yesterday and it wouldn't work...finally got it to work after an hour of stuffing around and the screen went balls up! called it a day as the problem has occurred before.....read my notes from last saga and back to it today, got it worked out only to find the internal battery is now flat, so it changes the screen settings once you turn it off, you have to turn it off to restart....once you do this your back to square one again....so it won't work...off to buy a battery now.... back to it tomorrow.