No, i haven't HDD.
I did already, formatted, several USB stick, no results.
Yes, i have Black Hole image.
I used all three USB ports.
Yes, i switching the receiver off, at the rear.
Do you get the "update file exist press the - button. - NO! Because my problem, the device can't see the USB stick, and not doing upgrade.
Sorry, but i'm not totally beginner, but this machine is new to me. Many times I've updated a lot of other devices.
My problem, the device can't see the USB stick, and not doing upgrade. Or, sometimes can see 5/30 times, not doing anything, not be prompted to update.