Afraid that I bricked device after steps below. Please help me to get out from that.
- Factory stock was flashed by Automatic Method stock2lede.trx  successfully to LEDE
- After reboot and login to device I executed step 5 for returning to stock 
sysupgrade -F /bin/busybox
- As result it's flash by all leds and keep still one led only for ~30 seconds 
Router was connected by cable to laptop that have 192.168.1.1 255.255.255.0 and recovery tool gave up with next actions 
Flashing busybox instead of a real firmware is intended to soft brick the router to make it boot into recovery mode. Now you have to get the recovery program working.
@mk24, thx for respond.
After 5sec holding reset button I able to ping router by default ip 192.168.1.1, 1 led flash slowly as described in faq 
Restore tool still told that device is not in recovery mode.
Is there any trick to make recovery work?
@mk24 Thx again for direction
I was able to recovery to stock firmware.
In my case trick was to use oldest available version: 188.8.131.52.380.8228
It even remember password from original stock image.
@glazeus If your problem is solved, please consider marking this topic as [Solved]. (Click the pencil behind the topic...)
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