I've disassembled my S 8.4 and tried to look after what causes the flickering and restarting what you have posted before. My battery had also drained insanely fast. After further examination I realized the problem can't be the battery connector because it seemed intact.
So, I have bought a new battery for ~15 pounds and after installation with 1 month usage-The problem has been solved.
I'm usually getting 7 hours screen-on time with heavy usage with a fairly consistent battery drain. And of course, there is no flickering anymore.
The average battery usage with screen-on is now 14.6%/h based on a fortnight measurement.
I guess I could advise you to buy a new battery if you have the same fault that I had.
Anonymous, 21 Feb 2017are you happy with it Yes I'm I love it my best tab I own
Samarpanb, 18 Jan 2017What are the real changes in new january update ? I didnt find any.... still have screen flick... moreThe screen flickering and restart was cause by the battery connector having connection issue. Open the tab, clean the connector and reconnect again will solve this issue. I am having the same issue until I search youtube on how to solve it. I don't have any specific tool, just use sharp item to open the case then reconnect it myself. The battery was glue into the tab, require very hard force to taken it out and I was really scare it explode :) when I apply so much force and bend the battery a bit.
Zach, 03 Sep 2016I got the upgrade to Marshmallow!are you happy with it
What are the real changes in new january update ? I didnt find any.... still have screen flickering and restart problem and too slow n laggy with normal graphic games ..
Does anyone here knows the update marshmallow on this device is good???
Does anyone here knows the latest update for this tab is ok..?I mean the marsmallow update because i still have not yet updated mine. I still have the lollipop version?
My Tab S 8.4 WiFi speed is very slow, @57 Mbps, compared to Desktop & cell @210 Mbps. Anyone have a solution or is it normal?
Franz, 06 Oct 2016It cant turn on after i install the mm update and restart. Pls help me what shout i do. It s... moreTry factory reset & wipe partition from the recovery. I had the same problem, now resolved.
Anonymous, 08 Nov 2016I also faced the same problem, I flashed it again with Lollipop, perplexed whether to update a... moreHi... I faced the same problem. Stuck in boot in the Samsung logo screen. So i tried switching it off with power + volume down button and it worked. I then removed the SD card, booted to the boot menu with power+volume up+menu keys and did a factory reset. Then removed the booted it again and it still got stuck. Tried rebooting manually with power and volume down button and after 3 tried it worked. Booted to the home screen as in after a factory reset. Checked the OS and it was 6.0.1! Major relief and it seems its a common problem for the mm update.
Franz, 06 Oct 2016It cant turn on after i install the mm update and restart. Pls help me what shout i do. It s... moreI also faced the same problem, I flashed it again with Lollipop, perplexed whether to update again or not.
Am just buying mine now and I hope it doesn't develop any issues like that of battery
It cant turn on after i install the mm update and restart.
Pls help me what shout i do.
It stay in samsung logo and nothing.
Stevie, 17 Sep 2016I was having the same problem. I would get white horizontal flashing lines across the screen, ... moreIf young don't charge it original Charger it shows vertical lines rhan freeze and restart.it happens sometimes below %50 ör %30 charge level. İt doesn't matter same spec Charger you habe to use is own Charger. İt never freeze anda restart then
ekin, 05 Sep 2015I have also same problem i used this tab s 8.4 but always auto restart its usually happen if ... moreI was having the same problem. I would get white horizontal flashing lines across the screen, the Tab S would freeze, and then it would reboot... sometimes. I sent it in to the warranty company. The first time it was returned they did absolutely nothing to it. The second time I re emphasized the issue with the loose wire on the battery and it needing resoldering. I even sent them web pages explaining this known issue. The work order accompanying my Tab S indicated they listened to me the second time. That's exactly what they did to fix it, and it's been running smoothly ever since. If your tab is still under warranty I suggest you send it in with specific instructions to fix and resolder the wires that are loose, or if you're handy enough I've read some people have done it themselves. Good luck
Just got my Tab S back from having it serviced. About a month after I got it the screen started flashing vertical lines and it would shut down automatically. I sent it in to have it repaired twice because the first time they did absolutely nothing despite my telling them about the history of the lose battery wires . The second time I again told them it was a resoldering issue with the battery. The work order reflected this and it works like a charm now.
Andy, 04 Jun 2016Can anyone give me advice on connecting this device to a tv. I bought a cheap cable to connect... moreI bought a $20 ezcast dongle from Amazon. It works beautifully and the Tab S recognizes it. One end of the dongle with an HDMI, so it just attaches to the back of your TV. You find the video from your tab that you want to play, use the stock video player, and at the top you'll get the option to stream it from your device or just stream it over to ezcast. It's as simple as that. I also have a Chromecast dongle and I can do the same thing with that, but the Chromecast is much more picky and finicky