It's wanting you to insert a code (to validate it) which is located on the serial number plate. The program code number is after after the word CODE. The program code PE0000 will not allow the machine to run. So find the code and enter it by using the control panel buttons and then once the correct code is in there hold the freezer temp down button till the code flashes. That saves it then hit any key to exit the programming mode. Simple ain't it. LOL I am hoping another tech will come in and simplify that proceedure. I ain't worked on these late models. I am old school too.