Hi @laurak_2003 ,
The LCD screen is cracked (see image below) and needs to be replaced as it cannot be repaired.
(click on image to enlarge for better viewing)
Here’s a video showing the dis-assembly of the tablet. This will help you to replace the screen assembly.
Replacements are available online. Just search for Samsung SM-T380 LCD Display Touch Screen Digitizer Assembly to get results for suppliers of the part, that suit you best.
If doing this yourself seems too daunting, contact a reputable, professional mobile phone repair service and ask for a quote. You will already know the cost of the replacement part.
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