I have just installed six new D batteries plus the two AA batteries for the the microprocessor's 3 volt back up
in my Sangean ATS-803A world band radio but its microprocessor has still been then been acting up now & then lately.
It locks up, shows weird things on the display, won't let you turn it off or on until you take all of the batteries out & so forth.
Putting the batteries back in also doesn't clear the problem. The radio must first sit without any batteries at all for a day or two for the problem to go away.
I don't understand what could be corrupting the microprocessor. Some type of interference maybe? Please respond! Thanks!