[FS#598] 842nd doesnt flash successful with factory image using the tftp-recover over the bootloader

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Alexander Couzens (lynxis) 

Attached to Project - LEDE Project
Summary - 842nd doesnt flash successful with factory image using the tftp-recover over the bootloader
Task Type - Bug Report
Category - Base system
Status - New
Assigned To - 
Operating System - All
Severity - Low
Priority - Medium
Reported Version - lede-17.01
Due in Version - Undecided
Due Date - Undecided
Details - 
Device: 842nd v3.1
LEDE: 17.01

Go into recovery tftp mode by pressing first the WPS/Reset button and now connect the power.
The device enters tftp recovery to download via tftp from 192.168.0.66 file (wr842nv3_tp_recovery.bin)

The device *seems* to accept the flash (sorry, no serial to confirm).
On boot, the device doesn't show leds nor it accepts any packets on ipv6 on any port (ping ff02::1) or ping to 192.168.1.1.

I guess this happens, because the oem flasher doesn't flash all blocks of the factory image.

To recover from this state:
- flash via tftp recovery
- enter LEDE rescue/recovery
- ssh root at 192.168.1.1
- use sysupgrade image

Task:
 - confirm this happens also with trunk
 - use serial to get more debug
 

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=598