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Help S5 SM-G900A FAIL! (Auth) every attempt to flash stock rom

Thank you for your reply!!
I'm not so sure. Where can I find latest version?
Are you trying to flash the latest released version by released date?
Most Samsung phones won't let you downgrade. You have to flash what is currently on the phone or newer version.
 
If you connect it to the wall charger, do you get any reaction from the phone?
Viberation, Charge animation or LED?
 
Know anyone else with a S5 you can try their battery? Could be that the replacement battery you have is toast even though not that old. No reaction on connecting the charger is not good and usually points to hardware failure.
What was the original reason for reflashing the firmware?
 
Know anyone else with a S5 you can try their battery? Could be that the replacement battery you have is toast even though not that old. No reaction on connecting the charger is not good and usually points to hardware failure.
What was the original reason for reflashing the firmware?
Just tried another battery, didn't help...
I tried flashing when all of these problems surface before, I was hoping it will help.
 
If phone was turning itself off before reflashing and new battery didn't help, motherboard was probably on it's death bed. Sorry we couldn't get it straightened out. Early S series phones ,3,4&5 were my favorite. Removable battery, SD card slots and easy to take apart. Just hated how most carriers started locking them down.
 
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