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[Nanor]

Hi!

I just bought a new Graph 25+ EII calculator. However, when turning it on, it doesn't show the Main Menu, just the message "OSUpdate". There seems to be no way to get past this message. 

 

I didn't find anything relevant in the manual, neither on the internet.

 

Does somebody know how to solve this?

 

Thank  you!

 

Nanor