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FX570ex calculator lines defect display problem?

casio fx570ex

whats that many lines? i just bought this calculator 3 weeks ago? is this a sign of low battery?

Block Image

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

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crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0
crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0