My old Futaba 9 ZAP channel 48 radio has developed a fading of the display print on the menu screen. It is so faint that I can hardly read the input screen, and it is even worse in cold weather. I was told these screens have been discontinued. Can anyone help with this problem? My transmitter has also had a couple of incidents where the receiver did not get a signal. Two different receivers went into hold so I assume it is in the transmitter. Is there any connection with this signal problem and the faded screen? By the way, I changed the batteries in the transmitter recently, both the 9.8 volt and the memory battery. I am not getting a low voltage prompt on either of these batteries. Thanks, Jim