[Xperia Tablet Z Q&A, Help & Troubleshooting] tp_88:
This is the debug-info for the part when kernel.sin fails, if that can be of any help:

14/053/2014 22:53:35 - DEBUG - Writing packet to phone

14/053/2014 22:53:35 - DEBUG - OUT : CommandID : 9 / Flags : false,true,false / Data length : 1 / Data CRC32 : [EE, 0E, 61, 2C]

14/053/2014 22:53:35 - DEBUG - Reading packet from phone

14/053/2014 22:53:35 - DEBUG - IN : CommandID : 9 / Flags : false,false,false / Data length : 0 / Data CRC32 : [00, 00, 00, 00]

14/053/2014 22:53:35 - INFO - Processing kernel.sin

14/053/2014 22:53:35 - DEBUG - kernel.sin : header size : 1608

14/053/2014 22:53:35 - INFO - Checking header

14/053/2014 22:53:35 - DEBUG - Sending part 1 of 1

14/053/2014 22:53:35 - DEBUG - Writing packet to phone

14/053/2014 22:53:35 - DEBUG - OUT : CommandID : 5 / Flags : false,true,false / Data length : 1608 / Data CRC32 : [B3, D9, 0A, 70]

14/053/2014 22:53:35 - DEBUG - Reading packet from phone

14/053/2014 22:53:35 - DEBUG - IN : CommandID : 5 / Flags : false,false,false / Data length : 0 / Data CRC32 : [00, 00, 00, 00]

14/053/2014 22:53:35 - INFO - Flashing data

14/053/2014 22:53:35 - DEBUG - Number of parts to send : 16 / Part size : 524288

14/053/2014 22:53:35 - DEBUG - Sending part 1 of 16

14/053/2014 22:53:36 - DEBUG - Writing packet to phone

14/053/2014 22:53:36 - DEBUG - OUT : CommandID : 6 / Flags : false,true,true / Data length : 524288 / Data CRC32 : [BA, 13, 65, 3C]

14/053/2014 22:53:36 - DEBUG - Reading packet from phone

14/053/2014 22:53:36 - DEBUG - IN : CommandID : 6 / Flags : false,false,false / Data length : 0 / Data CRC32 : [00, 00, 00, 00]

14/053/2014 22:53:36 - DEBUG - Sending part 2 of 16

14/053/2014 22:53:36 - DEBUG - Writing packet to phone

14/053/2014 22:53:36 - DEBUG - OUT : CommandID : 6 / Flags : false,true,true / Data length : 524288 / Data CRC32 : [34, D2, 71, 38]

14/053/2014 22:53:36 - DEBUG - Reading packet from phone

14/053/2014 22:53:36 - DEBUG - IN : CommandID : 6 / Flags : false,false,false / Data length : 0 / Data CRC32 : [00, 00, 00, 00]

14/053/2014 22:53:36 - DEBUG - Sending part 3 of 16

14/053/2014 22:53:36 - DEBUG - Writing packet to phone

14/053/2014 22:53:36 - DEBUG - OUT : CommandID : 6 / Flags : false,true,true / Data length : 524288 / Data CRC32 : [F6, 5C, 35, 5A]

14/053/2014 22:53:36 - DEBUG - Reading packet from phone

14/053/2014 22:53:36 - DEBUG - IN : CommandID : 6 / Flags : true,false,false / Data length : 0 / Data CRC32 : [00, 00, 00, 00]

14/053/2014 22:53:36 - DEBUG - Writing packet to phone

14/053/2014 22:53:36 - DEBUG - OUT : CommandID : 7 / Flags : false,true,false / Data length : 0 / Data CRC32 : [00, 00, 00, 00]

14/053/2014 22:53:36 - DEBUG - Reading packet from phone

14/053/2014 22:53:36 - DEBUG - IN : CommandID : 7 / Flags : false,false,false / Data length : 64 / Data CRC32 : [41, 42, 40, 29]

14/053/2014 22:53:36 - ERROR - Processing of kernel.sin finished with errors.

14/053/2014 22:53:36 - INFO - Ending flash session

14/053/2014 22:53:36 - DEBUG - Writing packet to phone

14/053/2014 22:53:36 - DEBUG - OUT : CommandID : 4 / Flags : false,true,false / Data length : 0 / Data CRC32 : [00, 00, 00, 00]

14/053/2014 22:53:36 - DEBUG - Reading packet from phone

14/053/2014 22:53:36 - DEBUG - IN : CommandID : 4 / Flags : false,false,false / Data length : 0 / Data CRC32 : [00, 00, 00, 00]

14/053/2014 22:53:36 - ERROR - ERR_SEVERITY="MINOR";ERR_CODE="0017";ERR_DYNAMIC="0x80080012 ";