My 48GX is slowly dying.
You might resurrect yours for awhile by pressing below the screen in the middle of the row. I am not kidding.
Then the ON/OFF button will work.
There is a short in your calculator.
Soon the functions along the right side will start failing.
It is kind of like watching an old friend die of cancer.... Not really but it sure sucks to have your calculator die. RPN with multiple stacks is the only way to go.
I will try that. And yes, that is very sad. I’m almost thinking about waiting to resurrect my HP until later so I can have my old friend awhile longer.