[Galaxy Tab Pro 12.2, 10.1, 8.4 General] greenblooded:
One more succesfull repair to report! This thread has been great for info!

I was having the same known issues with screen flickers, random reboots and reboot loops that went on even for more than 5 minutes! I have proof, just search for my youtube video titled

How many resets can you count in 5 minutes on my Samsung Galaxy Tab Pro 8.4?

I was a bit sceptical at first and sent my tablet to the service. They "reprogrammed" it but it didn't work... Battery was barely out of warranty (I went to the service 3 days after closing one year of purchase, tablet warranty is 2 years for the machine, 1 for battery...) so I was stuck with a flawed machine...

Service is charging 60€ for a new battery, which is really too much for something that can be found below 30€ at most retail shops here in Greece. So I decided that it was time to abandon official service and take things in my hands.

I actually ordered a battery (29.5€ including postage) but it proved to be not neccessary... I will keep it though, since at some point the original will probably start to take its toll...

Anyway, to the main point: I would open the tablet anyway, so I decided to try the reseating procedure.

IT WORKS !!!

I used a guitar pick! Its thinner than a credit card, extremely cheap to buy (0.10€ or so) and it will do, provided you start not from the corners but from the middle points of the sides! There it is easier for the pick to penetrate the cover, gently breaking the glue inside and making it possible to remove the cover. Of course at the end we have to put it back, but it is built in such a way that it firmly and safely seals again! No harm done, even the aluminum paint was not harmed at all! Needless to say that with the same issue at my Note Pro 12.2, the service did a poor job and that same paint is harmed all around the tablet, making it much rougher to hold now... If I only knew earlier...

One more thing, the stickers inside (barcodes etc) wasn't needed to be removed for the procedure. It really is impossible to see that I opened it!

I took the battery out, using that same "soft" guitar pick I gently lifted the battery pins off (it does a small click when out and then again in) and then again put it in its place, pressing gently to make sure it is seated well...

That was yesterday. Battery was at 90%. Today, 24 hours later, battery is at 38% after a lot of usage, including Clash of Clans and testing the brand new Clash Royale, both battery sucking apps! If you have tried them you know what I mean.

Prior to the procedure, when I opened Clash of Clans in less than a minute I would get an extremely hot device and numerous restart loops! Actually it was the easiest way to make the restart loops appear... Now the device won't heat up, and even though I tried to stress it, it simply won't complain! I did play Clash Royale for a straight hour, with small intervals of Clash of Clans, no problem! No excess heat, no restarts, no screen flickers!

It is incredible that what seems to be a manufacturing error in device assembly (battery connectivity), something that can be so easily fixed, is left torturing so many people by Samsung! Unacceptable, but what can we do...

Don't be afraid of the procedure. I do have think fingers and was a bit sceptical about handling tools and screws and all. But it was so much easier than I thought and now i do have a device that performs perfectly!

Thank you very much, everyone here that posted his issues and wrote your answers, I registered here for this one response only, to make sure everyone knows it does work!

I am so happy that I am really thinking following more advices in this forum, including rooting and flashing my device. It works like brand new, so with warranty ending in a few months and bloatware all around my device, maybe its time to change things in that too...

Big post, but I feel it was needed for everyone to know that all the stuff shown in the VERY HELPFUL videos posted, and all these comments talking about the solution are actually working!

Don't even think about it, do it and be rescued from your headaches!