I have the same problem, varying signal but perfect on the Access, the display eventually just froze on the splash screen, tried everything including the "black button" to kick it to life but nothing!!!! I had a 5in1 with not a squeak of problems, went to Atlas with nothing but problems, got onto Acurite with great help until I told them I bought it on Ebay, brand new in a sealed box from their warehouse, that was it....no more help, then like an idiot bought another new display on eBay and here we are 4 days later with the same problem, fluctuating signal but perfect on the Access, (in the same room as the display) I just put new batteries in the sensor which bounced it back to 4 bars, but 20 minutes later the bars have dropped to 0-1, should have kept my Davis setup, 8 years in the Arizona heat with new batteries every year and NOT a problem ever, almost ready to bundle it all up and put it on eBay, then go back to Davis!