So my calculator is stuck on the menu screen, and even if I take out the batteries and put them back in, it still shows the menu screen. NO keys are working, and I cant move in between the menu. Everything is stuck and no way to get it back to normal.
I tried changing batteries and resetting using the reset button, but nothing is working!
This is how it looks like, got the pic from the internet:

So basically it stays stuck here, and nothing happens, no keys work.
My calculator was not used for a month and now when I try it does not work.
Please help on how to fix this.