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Black screen after Samsung galaxy s5 logo.

I have a verizon galaxy s5 I rooted it with the help and guidance from xda members over here. The method I used to root my phone was this one http://forum.xda-developers.com/ver.../safely-upgrade-root-4-4-4-nha-volte-t2879348 since i was already on NI2 I skipped steps 1. to 2.5 post rooting my phone everything was running pretty good for a few days without any issues but less than a day after I inserted a sim card in the phone it started randomly restarting so did a data wipe factory reset but the problem still persisted where my phone would would either randomly restart or go into a boot loop then I got the G900VVRU1ANI2_G900VVZW1ANI2_G900VVRU1ANI2_HOME.zip stock retail tar from here http://forum.xda-developers.com/showpost.php?p=53447942&postcount=1 and used ODIN to flash it but strangely even after I flashed the stock firmware it gave me the UNLOCKED logo at start below the Samsung galaxy S5 logo so I did another data wipe factory reset and now the UNLOCKED logo has gone but I'm getting a black screen after the Samsung galaxy logo. I can enter recovery mode and download mode my phone also gets detected in kies even with black screen.
I'm pretty freaked out and devastated right now because of the suddenness of this problem. I hope someone knows how to fix this issue.
Sorry for the long post but I wanted to be as detailed as possible.

note 3 neo n7505

hey i have note 3 4g variant ..problems started when i used my mobile for 2 hours making a phone call during charging by blackberry's charger .when i finished talking i tried to access my contacts bt it were still updating and could have no longer access to my contacts and my mobile started to hang.i have installed twrp recovery .so i tried to reset my mobile using recovery but something went wrong while clearing dalvik cache and my mobile got stuck on boot and boot loop started so i downloaded official firmware and flashed it but after i installed firmware while starting my mob white screen appears and dan samsung logo and mobile gets started sometimes it automatically gets restared while trying to unlock my device..nd when it gets restart glitches appear on screen...plz help me out what to do i m not able to open recovery mode ,...what would be d possible way to get rid of this..

Help C9 Pro (SM-C900F) Stuck on Samsung Logo

Hi Friends, i am tried of solving this problem.
my mobile is stuck on samsung logo even after flashing the stock firmware and wiping data, after flashing the stock file if i go to recovery it is showing some recovery breaking sign and then load recovery normally, after wiping data and everything it stuck on samsung logo, once i manage to pass the samsung logo by entering to safe mode but its showing something like reset device security integraty bla bla.. i have tried each and everything to fix this issue but it always failed . please help me , its wasting my lot of time and giving me stress from last 3 days.

samsung s8 random restarts

hi guys...own samsung s8 sm-g950fd on android pie may security udate installed...2 days ago it started to reboot itself when the screen is off. If in use no rebooting noted. It did it randomly..very annoying..sometimes the phone goes off and refuse to boot despite pressing the power button until you scream...then later it boots
what I have done so far
1. factory reset no change
2. safe mode...becomes unstable and usable
3. reinstalled firmware(android 8.0 and 9) via odin..no change reboots randomly
4. rooted and installed custom rom renovate ice 15.0..no change reboots randomly
help

Aizen79 said:
hi guys...own samsung s8 sm-g950fd on android pie may security udate installed...2 days ago it started to reboot itself when the screen is off. If in use no rebooting noted. It did it randomly..very annoying..sometimes the phone goes off and refuse to boot despite pressing the power button until you scream...then later it boots
what I have done so far
1. factory reset no change
2. safe mode...becomes unstable and usable
3. reinstalled firmware(android 8.0 and 9) via odin..no change reboots randomly
4. rooted and installed custom rom renovate ice 15.0..no change reboots randomly
help
Click to expand...
Click to collapse
Most probably motherboard issue and should be replaced if possible ,had same issue on s7edge with random reboots ,shutdown not turning on ect

Hi guys, regarding the restarting issue...have some “improvements” after deleting data in apps...phone and device maintenance....15 hours without restarting..fingers crossed

Hi guys....the restarts have become too much to the point the phone is unusable...its worse when the phone is on 4G/LTE...Sometimes the screen goes dark and the phone becomes unresponsive.
My effort to take to the Samsung centre for repair has been in vain...as I bought the phone overseas and the warranty is not honored here.
Any help will be appreciated...

S7 Edge Freezing / Restarting even in TWRP

Hello, guys!
I'm coming here with a big problem. I used to have a Galaxy S7 Edge (Exynos edition) , but decided to buy a new phone.
I haven't use S7 Edge for 6 months, after this time the phone isn't working anymore. Used to work very well before that.
I've managed to charge it.
First symptom: keeps restarting and freezing when passing from Galaxy LOGO.
What I have tried until now:
1. Flashed TWRP 3.4.x.x
2. Flashed Floyd ROM, worked for 10-15mins but started again to enter an infinite loop of RESTARTING and sometimes freezing.
3. Flased a boot.img extracted from a UnitedKingdom SW. The flashing process was done by using adb while the phone was on TWRP.
4. Flashed Samsung Original SW using ODIN. The flashing process succeded but the phone kept showning "no command" message alongisede with a nice and green Android )
Can you help me revive this phone?