Edit: Thank you all! Activating the death ray worked!
I’m doing the DE Easter egg and this keeps happening after I go for the Groph code. I checked out multiple guides and they all say that once you grab the batteries for the death trap and set it to protect you should be able to input the code groph uses in the past and continue with the Easter egg. Every single time I’ve tried the screens have been blank. Is there something I’m missing??