crwdns2934241:0crwdne2934241:0 drmdolfan

crwdns2934249:0crwdne2934249:0:

You can clean the keypad by disassembling the calculator and using isopropyl alcohol - located this from other questions on these calculators.  The author of the guide below had the same problem.

https://www.instructables.com/Ti-84-Basic-Disassembly/

crwdns2915684:0crwdne2915684:0:

open