Our rain gauge stopped sending info to our monitor so I took the weather station down, cleaned it and replaced the batteries. While I was cleaning it the monitor registered 5.60 inches of rain so it sent a signal during the process. Now I am trying to calibrate it and there is no rainfall registering on the monitor and the rainfall box shows a triangle with an exclamation mark (much like the problem icon on this forum) but I can't find any explanation of what that means and how to resolve it. The troubleshooting section of the manual is not helpful in that regard. Please note that I have done everything you usually recommend so this issue is beyond using correct batteries, etc.