Ive got a HTC One here with the problem mentioned in the title. The phone is completely stock, locked bootloader, not rooted, S-ON.
The phone does not get past the HTC screen at all, it stays there for a few seconds and turns off. I can get into the bootloader, but cannot get adb to work. However fastboot is working fine.
Ive tried to unlock the bootloader so that I can try to get a custom recovery and install a ROM that way, but everytime I try to unlock it it restarts and gets stuck again. Comes up as locked once back into the bootloader.
Tried flashing an RUU, but the ones Ive tried bring up a singature failed error, I assume due to the locked bootloader.
Searched, looked, and read through many threads/posts for the past few hours and I cant find anything to help me.
This is what getvar all brings up...
version: 0.5 version-bootloader: 1.55.0000 version-baseband: 4A.21.3263.04 version-cpld: None version-microp: None version-main: 3.62.401.1 version-misc: PVT SHIP S-ON serialno: imei: meid: 00000000000000 product: m7_ul platform: HBOOT-8064 modelid: PN0710000 cidnum: HTC__001 battery-status: good battery-voltage: 4320mV partition-layout: Generic security: on build-mode: SHIP boot-mode: FASTBOOT commitno-bootloader: dirty-bb768ae1 hbootpreupdate: 11 gencheckpt: 0