Can I get some help with a reset problem with my Nokia Lumia 620?

Hard reset - soft reset

The nokia still reboot in loop (smartphone reboots always)

Windows recovery tools device does not work
The mobile phone is recognized, but the background of red nokia screen displays three seconds and restarts smartphone

nokia recovery sofware tools does not work - he asks to use Windows device recovery tools

Nokia Software Updater does not work for Retail

NaviFirm software version 1.7 + can not access the site

Do you have another solution to reset it?

Thank you

i have already test with "about" menu

i have test combinaison : volume up- volume down - power button and volume down

no solution for now

i cannot install version 5.0.0 of lumia software recovery tools


i just test
lumia software recovery tool 5.0.0 but it's impossible to connect to the server
working offline not working for the moment (phone info package not found on disk)

nobody ? no solution ?