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Solve TI-84 Plus CE "Validating OS" Error | TI-84 Plus CE Flashing Validating OS
Is your TI-84 Plus CE calculator stuck on "Validating OS"? Your battery might be dead! In this video, I show you step by step how to replace the battery and get your calculator working again. 🔹 Ordered a free replacement battery from Texas Instruments 🔹 Removed the old battery and installed the new one 🔹 Charged the battery overnight ...
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