u/RBX_A

My Voyage 200 Calculator is stuck on the Installation in Progress Please do not interrupt screen. I cant do anything, most of the Button shortcuts dont work. What does work is holding Apps while turning on the calculator to make it ready for an OS install. I can connect my calculator to TI Connect flawlessly while in this state, but when i want to load the newest OS onto the Calculator, the Screen sais "Cannot Back up cert memory" and TI Connect sais something in French (Le transferit courant a echoue. Une prochaine tentative peut reussir (8C010001)). I alrealy replaced the normal Batteries and the Memory-Battery with brand new ones... what is left to do?