[Q] Galaxy s5 stuck on black screen (HELP) - AT&T Samsung Galaxy S 5

Hello! I am posting this because I have searched for hours on how to fix the phone with no luck, so this is a last resort. Im using a AT&T (sadly) galaxy s5. I was going to update to lollipop but couldn't since my device was rooted. I tried to unroot it by using supersu, but pulled the battery because it was taking forever (I know I know.) The phone at first booted to safestrap and I tried to factory reset to take off the root. Now, whenever I turn on my phone, it wold be at the samsung galaxy s5 screen with the little unlocked symbol. I tried to flash the stock firmware with odin. Didnt work. Now it boots (still says unlocked) and when the samsung animation finishes, it stays on a black screen. Any help at all? Thanks!

Try flashing the kernel from the root page

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Can you get to download mode and stay there? if you can, you can try re-flashing a stock rom on to it, it might fix the messed up super su config.
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Samsung Galaxy S6 Active stuck on logo

Hello, I have a Samsung Galaxy S6 Active (SM-G890A) (AT&T) That I recently requested a sim unlock code for through AT&T. After I received the code, I inputted it upon the prompt, And after it accepted it, the phone froze and rebooted about 5 times or so, then got stuck on AT&T logo. I booted the phone into recovery mode and wiped the cache and factory resetted it. Now the phone just hangs immediately on the Samsung logo screen. I cannot boot into recovery mode, or safe mode. ODIN mode can still be accessed. Please note that the phone has never been rooted or had a custom ROM flashed on it. This phone has not had service for about a year now, So I cannot take it to AT&T. I wanted the phone unlocked so I could use it as a backup phone.
Same problem here, but mine seems stuck in bootloop, I'm trying some things for now, hope I can make it work again...
Delextris said:
Hello, I have a Samsung Galaxy S6 Active (SM-G890A) (AT&T) That I recently requested a sim unlock code for through AT&T. After I received the code, I inputted it upon the prompt, And after it accepted it, the phone froze and rebooted about 5 times or so, then got stuck on AT&T logo. I booted the phone into recovery mode and wiped the cache and factory resetted it. Now the phone just hangs immediately on the Samsung logo screen. I cannot boot into recovery mode, or safe mode. ODIN mode can still be accessed. Please note that the phone has never been rooted or had a custom ROM flashed on it. This phone has not had service for about a year now, So I cannot take it to AT&T. I wanted the phone unlocked so I could use it as a backup phone.
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Similar problem here. But my screen stopped working too. I hear the Samsung logo sound. Sometimes the logo sound is completely played sometimes the phone seems to restart just in the middle of it. It seems to hang in a loop, its doing that as long as has battery and only stops as soon the blue light is out too. I can't shut it down with the keys.
There are a lot of photos on it. It would be nice to get them from the phone somehow.

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