P9+ in bootloop, keeps restarting, can't flash

[nahueloyha]

Hi!

I've a problem with a P9+, it doesn't boot and keeps restarting everytime (stock phone, never change anything with this). I tried flashing stock rom with DC Phoenix but is unable to finish before the phone restarts.

Until now i was able to flash boot.img and recovery.img (by separate) but nothing changed, i couldn't flash system.img with success yet.

Details:
- the battery is dead, the phone only turns when connect to PC/AC.
- already tried the force upgrade method (with rom in sd/dload) but the phone restarts before it ends
- the BL is locked so fastboot commands doesn't work (and i can't unlock it despite having the official code because of the "OEM unlock" option not enabled on Android).
- DC Phoneix can bypass the locked BL but can't finish writing the .img on time
- i've already tried the eRecovery option too (fails) and wiping cache / reseting system

After 2 days "fighting" I'm almost out of options, any idea is welcome!

Thanks!

[Valdemaras]

If battery is dead, phone keeps restarting, softwares won't be able to help. You will need main board replacement, including battery pack.