[Galaxy Note 10.1 (2014 Edition) Q&A, Help & Troubl] rhoobarb2002:
Hi, hoping someone can help.

Having a major problem with my P605 (Hong Kong version), It just will not start up anymore.

Current State:

At the moment, with just the power button, it shows the samsung galaxy note 2014 logo. Then a few seconds later the startup sound will play. Then a few seconds later the samsung boot animation plays. Then once the animation stops and just displays the samsung logo, nothing else. It stays on that, and can stay on it for hours.

Note: The Samsung boot animation has a very pink hue to it, like the cyan and yellow are no longer there. More on that later.

With the Power + Home + Vol Up it says recovery mode is starting, then resets and boots as above.

With the Power + Home + Vol Down it goes into download mode no problem.

Background (Some of it may or may not be relevant, just putting it on here in case it is):

Up until a couple of weeks ago it was stock, but rooted JB (IIRC), then it was accidentally dropped (not by me). It is in a Trident Krakhen case, but that did not stop damage being done, the damage being the backlight stopped working. I followed a Youtube guide and removed/reinserted the ribbon. Put it back together and switched it on, and worked, sorted!

Now I thought as the seal of freshness has been popped, I may as well upgrade it to Lollipop so I can play Pokemon Go. As Lollipop has not been released for HK p605's I used the Irish (I think) firmware. Upgraded using Odin, no problem. So then I wanted root access, so I used the method described on XDA to root Lollipop using "CF-Auto-Root-lt03lte-lt03ltexx-smp605.zip". Again, flashed with Odin, no problem. But the root didn't take, a few programs randomly lost root access, others would not ask for access and just say the tablet was not rooted, etc. I reflashed the file at least 6 times to try and get it to take. Eventually it did.

Forward to the next day, I go to unlock my tablet and the screen has gone all pink, same as above, like Cyan and Yelow have gone. And a black shadow is over the left half of the screen. I restarted the tablet, colours came back, yay. All fine up until yesterday, the pink and shadow were back again. This was late at night while I was in bed, so not near the computer. I restarted the tablet. This time the pink stayed. OK, so I thought I will wipe the tablet back to factory and see if that helps (not done a wipe or anything else up until this point) so I try to go into recovery mode. It showed the logo and the little blue recovery text, then black screen, then normal boot logo and back into the OS. Tried a few times to get into recovery mode, but just kept resetting back to OS. So I told ROM toolbox to force a recovery restart, big mistake! It went into recovery boot loop. Just Galaxy Note 2014 entering recovery" then blank, repeat. No sound, nothing. I think that perhaps if I can turn it off, it may reset the whole thing, I put the tablet into download mode, then go to sleep. In the morning, the battery is dead. Great! Plug it in, instantly recovery boot loop. Fudge! From this point I don't know the battery level of the tablet, so that MAY be causing issues. I plug it into the PC to flash with Odin. Flashed stock lollipop, restarted, flashed stock bootloader, flashed CF auto root. Multiple times in each. Nothing seems to bring it out. The closest I got to something was the tablet telling me recovery was screwed and I needed to use Kies recovery. I left it plugged in for a few hours to try and build up some battery power, the PC does not provide enough power to charge, it makes the screen flicker rapidly when the battery is empty, but all the time while charging it is boot looping and the screen is on full brightness so I don't know how much I gained.

Finally flashed stock KK, and now it just hangs on the Samsung animation logo as above.

Is there anything I can do?

Does the pink hue and black shadow mean hardware is affected? The colours seem fine in download mode.

If anyone could help that would be great as I am scratching my head here.

EDIT 1: OK, I took the casing off, found that the little push on connector next to the usb connector had pried itself loose, I reattached it, and removed/reinserted the screen ribbon cable. All while the tablet was powered on (my old electronics teacher would have had a fit!). Restarted, the pink tinge has gone and the boot animation came up at the same time as the audio. Good signs. But still froze on the 'glow' effect. Tried recovery and YES it went into recovery, although the little android fell over with an exclamation mark over him. But still, progress. So now I am reflashing stock, will see how it goes. :)