Just receive my Denon avr-4310 today. Right now i'm installing the receiver. I am doing an firmware upgrade. Downloading the firmware did go right, but now the display is saying :

Sub 24 min
Connectionfail5A


The message don't go away for about 20 minutes. It is now 1.00 AM in Holland (so no dealer available at this time) , so maybe some people in another timezone cam help me.

What do i need to do now ??????
Thanks for your help