This is the right procedure sended by LEO :
Da: "admin@cctvforum.com"
Ciao Andrea,
Il tuo modello e' AVC796B?
I send you the last version of firmware and the instruction for the manual
reset, probably Tomcctv is right, if you tried to upgrade the wrong version
or you did some mistake in the upgrade it's possible you need to send the
dvr to AVTECH for repairing.
Can you tell me what do you see when you turn on the dvr? Any beep, and
strange colors on the screen?
Firmware:
ftp://211.75.84.102/Firmware/AVC796B_1007.rar
Manual reset:
https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0B_Tf3Yb1yhhRYWE1YWNiMzYtYmQxNy00ZjJhLTllMTItY2MwNzExZmJhMThl&hl=en_US&authkey=COvFtqMP
Remember to:
-unzip files to one usb drive (don't put in any folder)
-insert the usb in the usb port of dvr
-connect the 2 points (like in the instructions)
-turn on dvr
-when you listen the bip, remove the items to connect the 2 points.
do this operation up to 5 times, if it's not working, need to send for
repairing.
Leo