Why do I have background distortion when I select folders?

Question

Samsung Galaxy Note 10.1 2012

A 10.1 inch Samsung tablet computer with a 1.4 GHz processor, 1280x800 pixel LCD, and 149 ppi multi-touch display. The model number of the device is GT-N8013ZW. Released August 2012, repair of this device is straightforward.

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Ari @ari1387

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crwdns2931729:0crwdne2931729:0: N'w 16, 2017

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Why do I have background distortion when I select folders?

I recently downloaded some games from they play store. They have since been removed.

I noticed shortly after, when I select a folder on my home screen, black lines and weird letters that look like some kind of coding appear in the background. When I unselect the folder, background goes back to normal.

I have restarted the tablet, run a virus scan (clean), removed any apps that were recently downloaded. Nothing has worked so far, I'm worried something is corrupted or there's a virus somewhere that's not getting picked up on the scan.

Image attached.

Thanks in advance for any advice!

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Is that the default Samsung launcher? It doesn't look like the Samsung Experience.

crwdns2934271:0N'w 16, 2017crwdnd2934271:0 S W crwdne2934271:0

I'm not sure what you're asking, but I haven't changed anything but the background images.

crwdns2934271:0N'w 16, 2017crwdnd2934271:0 Ari crwdne2934271:0

I'm thinking either the tablet needs a factory reset (wipe data) or LCD cable needs to be reseated.

It's weird how you managed to screenshot that so I think hardware isn't the issue.

crwdns2934271:0N'w 16, 2017crwdnd2934271:0 Ben crwdne2934271:0

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Is that the default Samsung launcher? It doesn't look like the Samsung Experience. — S W
I'm not sure what you're asking, but I haven't changed anything but the background images. — Ari
I'm thinking either the tablet needs a factory reset (wipe data) or LCD cable needs to be reseated.

It's weird how you managed to screenshot that so I think hardware isn't the issue. — Ben