U11 Life imei repair, blank screen during process

Reading information...
Using Fastboot mode...
Reading common information
(bootloader) kernel: lk
(bootloader) product: htc_ocla1_sprout
(bootloader) version: 1.0
(bootloader) max-download-size: 1148000000
(bootloader) serialno: HT81K1C01319
(bootloader) slot-count: 2
(bootloader) current-slot: a
(bootloader) imei: 358736080363655
(bootloader) version-main: 2.13.401.4
(bootloader) boot-mode: download
(bootloader) version-baseband: READ version-baseband ERROR
(bootloader) version-bootloader: 1.0.0.0000
(bootloader) mid: 2Q3F20000
(bootloader) cid: HTC__001
all:
finished. total time: 0.026s
htc_fastboot finished
Reading CID information
... (bootloader) cid: HTC__001
OKAY
finished. total time: 0.060s
htc_fastboot finished
Reading MEID information
... (bootloader) meid:
OKAY
finished. total time: 0.023s
htc_fastboot finished
Reading IMEI1 information
... (bootloader) imei: 358736080363655
OKAY
finished. total time: 0.025s
htc_fastboot finished
Reading IMEI2 information
... (bootloader) imei2:
OKAY
finished. total time: 0.024s
htc_fastboot finished
Reading secure flag information
... (bootloader) Device security level S-ON, reboot count 0
OKAY
finished. total time: 0.056s
htc_fastboot finished
Reading serial number information
... (bootloader) Device Serial No. is HT81K1C01319
OKAY
finished. total time: 0.024s
htc_fastboot finished
Reading color information
... (bootloader) COLOR ID: DEF01
OKAY
finished. total time: 0.023s
htc_fastboot finished
Read information completed.
__________________________________________________ __________

Starting PowerAdapter procedure:
Note: Can't connect with server to check if a new version of special recovery file is available!
Special recovery file is available
1. Checking phone connectivity.......
Phone connection confirmed!
HTC KEY CARD VERSION: 7
2. Checking Server connectivity...
Server connection confirmed!
3. Checking PowerAdapter connectivity...
Process started
PowerAdapter connected, processing request to adapter...
Rebooting to boot-loader:
Waiting for the phone...
Phone DISconnected
Phone connected [HT81K1C01319] *** Fastboot mode
Executing operation...
Starting operation...
Operation completed!
Releasing adapter.
Request completed

unlocked bootloader
repaired XTC2CLIP file system
repeated again and again
when it says
Executing operation...
phone goes to blank screen
but everything remain same
please help