RBR50 Wont Boot

Bought a second hand RBR50 from eBay, currently it wont boot correctly, attached a USB > Serial adapter and it intermitently will boot up but a lot of the time it will stop at this stage in the boot process

Format: Log Type - Time(microsec) - Message - Optional Info
Log Type: B - Since Boot(Power On Reset),  D - Delta,  S - Statistic
S - QC_IMAGE_VERSION_STRING=BOOT.BF.3.1.1-00110
S - IMAGE_VARIANT_STRING=DAAAANAZA
S - OEM_IMAGE_VERSION_STRING=CRM
S - Boot Config, 0x00000023
S - Reset status Config, 0x00000000
S - Core 0 Frequency, 0 MHz
B -       261 - PBL, Start
B -      1339 - bootable_media_detect_entry, Start
B -     94363 - bootable_media_detect_success, Start
B -     94377 - elf_loader_entry, Start
B -    100332 - auth_hash_seg_entry, Start
B -    102480 - auth_hash_seg_exit, Start
B -    162346 - elf_segs_hash_verify_entry, Start
B -    276552 - PBL, End
B -    276576 - SBL1, Start
B -    368606 - pm_device_init, Start
D -         9 - pm_device_init, Delta
B -    370112 - boot_flash_init, Start
D -     37825 - boot_flash_init, Delta
B -    412282 - boot_config_data_table_init, Start
D -      9606 - boot_config_data_table_init, Delta - (419 Bytes)
B -    424502 - clock_init, Start
D -      7544 - clock_init, Delta
B -    435485 - CDT version:2,Platform ID:8,Major ID:1,Minor ID:0,Subtype:1
B -    438890 - sbl1_ddr_set_params, Start
B -    443984 - cpr_init, Start
D -         2 - cpr_init, Delta
B -    448366 - Pre_DDR_clock_init, Start
D -         4 - Pre_DDR_clock_init, Delta
D -     13171 - sbl1_ddr_set_params, Delta
B -    461661 - pm_driver_init, Start
D -         2 - pm_driver_init, Delta
B -    532948 - sbl1_wait_for_ddr_training, Start
D -        28 - sbl1_wait_for_ddr_training, Delta
B -    549196 - Image Load, Start
D -    138157 - QSEE Image Loaded, Delta - (262104 Bytes)
B -    687781 - Image Load, Start
D -       898 - SEC Image Loaded, Delta - (0 Bytes)
B -    697629 - Image Load, Start
D -    164328 - APPSBL Image Loaded, Delta - (416039 Bytes)
B -    862383 - QSEE Execution, Start
D -        59 - QSEE Execution, Delta
B -    868555 - SBL1, End
D -    594092 - SBL1, Delta
S - Flash Throughput, 2187 KB/s  (678738 Bytes,  310274 us)
S - DDR Frequency, 672 MHz

If it does get past that stage (not all the time) it will display the following

## Booting kernel from FIT Image at 84000000 ...
   Using 'config@1' configuration
   Trying 'kernel@1' kernel subimage
     Description:  ARM OpenWrt Linux-3.14.77
     Type:         Kernel Image
     Compression:  gzip compressed
     Data Start:   0x840000e4
     Data Size:    3056350 Bytes = 2.9 MiB
     Architecture: ARM
     OS:           Linux
     Load Address: 0x80208000
     Entry Point:  0x80208000
     Hash algo:    crc32
     Hash value:   6c526cda
     Hash algo:    sha1
     Hash value:   859d1e24b8930ea0400799e997d56a3d301738c8
   Verifying Hash Integrity ... crc32 error!
Bad hash value for 'hash@1' hash node in 'kernel@1' image node
Bad Data Hash
ERROR: can't get kernel image!

Reading on here it seems to be a known issue with a firmware upgrade, I have attempted to re-flash the firmware however this never resolves the error. Is this router bricked now or is it possible it can be recovered?

On a side note, when its powered on the power light stays solid green (never changes, even when doing the 30-30-30) and the ring lights sometimes flash white.