Hello,
Clear the screen. Reset RAM :[2nd][MEM][7:Reset][All ram] [2:Yes] Ram cleared is displayed. [Clear] the screen.
Hope it helps.
Start by identifying your calculator and by listing the apps and third-party programs and games that are stored in it. Describe a bit more what you call "random" lines. They may have a pattern. If possible, take a screen capture of calculator via TIConnect software, save it in in jpeg or png format and paste it in your comment.
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Tried Reset Ram it works for a few minutes and then same issue occurs. Is there anything else to try?
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