Official comment

If you're unable to re-flash it, then as noted in this post, you'll have to see about an exchange or send it for service. Sorry!
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If you're unable to re-flash it, then as noted in this post, you'll have to see about an exchange or send it for service. Sorry!
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Hi, are you still able to enter the service menu / update by this procedure?
Please turn on a power supply, pushing both the buttons of LOOP IN and RELOOP./EXIT (Please continue pushing until "Pioneer LOGO" screen disappears.)
It is displayed the message of "Connect a USB storage device to the USB port."
And putting in a freshly formatted (FAT32) usb-stick with fresh copy of firmware file.