My F75 LTD while detecting the screen goes blank with the exception of the Batt. Ind. or if you hold it up straight out. Now if your sweeping and go over a target it comes right back or if you touch to controls or ADJ. the setting it will come back but then when you start sweeping again it will disappear. Now I posted this on a few forums and everyone says there display never goes away its there all the time . Fisher is telling me that's normal (a sleep mode), I'm saying it isn't. I ask them if there was some kind of "HOT KEY" setting that you could turn it on or off that we don't know about as users , he said all F75 work that way, the tech keeps saying the display is there when he goes to etc.etc and i'm telling thats right but don't do anything just sweep without a signal and it will go blank. Anyone have any ideas about this problem, this is the forth time this detector has gone back. just a couple of months ago it was sent back for a loose display cover and that's when this problem seemed to start. Hope Tom D's looking, his advice helped me before. needs some info cause the detector is still at Fisher.