Columns of colored pixels - Samsung Galaxy A21s Questions & Answers

For some reason my A21s when entering recovery mode, downloading or even the update interface where the update percentage is shown, some colored columns appear, I don't know why that happens, if when I use my cell phone normally the screen has no problems. It only happens when I enter where I mentioned, I can interact with the recovery and the download mode, but those columns don't let me see the interface, I already formatted it, with the blind download mode I flashed it but it's still the same.
I have searched the internet but can't find anything.
In this image I entered recovery mode, I can interact with it but blindly because it doesn't give me the interface image, only the columns:
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Could someone help me fix it please? I want to install custom roms but since I can't interact with recovery mode, when I install TWRP I won't be able to do ANYTHING, if anyone knows what might be happening I would really appreciate your help.
Thanks.

Seems like a mobo failure.

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"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
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Looks like you will need to try and restore by flashing the original factory img files.
Guide: http://forum.xda-developers.com/showthread.php?t=1907796 (hint, skip all of the SDK stuff for adb and fastboot and just use this - http://forum.xda-developers.com/showthread.php?t=2317790) . Also, make sure to grab the same update or newer, for best results.
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"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
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{
"lightbox_close": "Close",
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"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
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"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
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You have erased/deleted your Boot partition. No need to worry tho. You will need to flash the stock rom or boot image using a computer. There are many tutorials out there for that.
Just like this one :
P.S. the device is different but the brand and problem are same, so you should have no problem.
You have erased/deleted your Boot partition. No need to worry tho. You will need to flash the stock rom or boot image using a computer. There are many tutorials out there for that.
Just like this one :
P.S. the device is different but the brand and problem are same, so you should have no problem.

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