Hi,
Seems as though the touchscreen (supplier example only) is cracked even though you say everything still works OK.
This will have to be replaced as it cannot be repaired.
I cannot find a guide online that shows how to do this but at least you should be able to find the part by searching for 5D68C15471 to get suppliers that suit you.
If doing this yourself may be too daunting contact a reputable, professional mobile phone repair service and ask how much they charge for replacing it: a) if you supply the part and they replace it or b) if they supply the part and fix it.
It may be that it is more expensive than the fine. Even though the part seems inexpensive the labour repair cost may make it expensive.
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Screen display broken my phone
crwdns2934271:0crwdnd2934271:0 Shivaraj Myakal crwdne2934271:0