two hours charging with a wall charger and voila, access to kindle is back.
no success with your commands...
Then I download firmware 4.0.0 and with fastboot
C:\Program Files\RS\KINDLE\Dev\fastboot>fastboot flash kernel main_kernel.img
OKAY [ 0.188s]
OKAY [ 0.922s]
finished. total time: 1.109s
C:\Program Files\RS\KINDLE\Dev\fastboot>fastboot setvar bootmode diags
setting 'bootmode' to 'diags'...
finished. total time: 0.016s
C:\Program Files\RS\KINDLE\Dev\fastboot>fastboot reboot
finished. total time: 0.000s
and the rest with putty.
After typing reboot from putty nothing happened - only putty was disconnected.
Different from previous state is - kindle is not frozen.
Disable diagnostic and reboot directly from kindle menu.
kindle boot to MAIN menu,yippee!!!
Now I have working kindle with firmware 4.0.0 and firmware update to version 4.1.0 is unfinished with error U006... Great
Before this story, I have firmware 4.0.1...
Somebody have stored update 4.0.1? No more available on amazon....
Or any suggestion about error U006?
Thanks again to all for your help.