hello.. i have a problem please someone give me a tip

i make all steps following the guide of fx3.1 and also tried the complete 3.0 guide.. everything install perfect but when i reset after copying everything to my flash disk it goes to the language part but a few seconds later the unit reboots itself and then appears the pioneer logo at the startup but never goes to the menu

 

i'm lost i did everything well as the guides says

 

i have av avic x910bt US model.. that had the system startup in progress problem (i dont know if that has anything to do) and it came with the 3.02 firmware when i bought it

 

another question i touched something called "watchdog test" in system menu.. i dont know maybe is that

 

if someone have a link to a backup of x910 post it please!

 

thanks and cya