

Couch find TI84 Plus
Friend of mine bought a couch off of Facebook marketplace. Was cleaning it up, vacuuming beneath the cushions and found this TI84 down in the crevices! 5/06 build and had dead Energizers that expired in 2014, so possibly its first batteries! Luckily, there was no corrosion. Put aaa's in from my Casio CG100 and it fired right up! Os 2.40, so most likely never been updated. Should I update to 2.53MP, or leave it OEM? I already have a TI-84 Silver Edition Teacher ViewScreen calculator that I used with my old TI Presentor.