Galaxy Tab S3 (SM-T820) Black Screen (even after factory reset) - Samsung Galaxy Tab S3 Questions & Answers

Good evening folks,
I am in need of help. I've been having issues with my tab S3 (SM-T820) for the last month or so. I notice that when i let the device charging over night, after i disconnect it, the screen goes black. I know the device is on, since the button lights are active. I've performed forced reboots (holding power + volume down buttons), and screen remains black, but device is on. I've performed hard resets via the odin software and the firmware, and yet the screen remains black (again, device on, button lights on). If i connect the device to a charger, when the screen is black, the screen turns starts displaying a black "speckled" display (black screen with color dots everywhere). When i see that, i start pressing the power button, turning the screen on and off continuously, until i finally get the screen to appear. Problem is that once i turn off the screen (not the device), again the screen will go to black and not appear anymore, until i keep messing with the power button again. I'm finally at lost since i sent the device to squaretrade for warranty support, and they keep sending it back as repaired (all they did was a factory reset, which is what i have done via the Odin software). Any idea on what to try next? I have though about disassembling the device and verifying the display cable is correct, but just seems irrelevant that it could be a hardware issue since eventually the screen does come on again (after trying countless of times), plus, i don't know how to disassemble this thing. Any ideas or recommendations?
Thank you in advance

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I know it's stating the obvious but have you done a full reset on it? (Hold the button down, a good 8 seconds, until it forces it to reboot)
admisi said:
I know it's stating the obvious but have you done a full reset on it? (Hold the button down, a good 8 seconds, until it forces it to reboot)
Click to expand...
Click to collapse
Just my 2 cents,I had to hold it down more like 20 seconds, way more than seems logical.
From my Galaxy Note 2
Has there been an answer to this because I've been having the same issue with mine for about 4 months. As stated before, it turns on but screen stays blank but I know it's working because it vibrates after I turn it on. Mine is a international one.
possibly a screen defekt? was the same thing with my when i rip it apart

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Description
Sometimes, apparently in a random manner, after a period of time being idle (in my pocket or on the table) the phone becomes unresponsive to any inputs (power button, fingerprint reader) and the screen stays black.
Symptoms
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