Note: The version of the console software available here is from 12 December, 2013.
Copy to a USB flash drive If you cannot connect your Xbox 360 console to the Internet, you can copy the console update from your computer to a USB flash drive and then install it on the console.
And if it can't, is it possible to flash it again ?
As for been banned if the console is already banned you wont be able to connect to Xbox Live, if not just use as normal as it doesn't sound like your console is modified from what you have said. XB1: Launch console - 500gb internal drive, 1tb external drive 360: Jasper - 1tb drive - jtag hacked running the 17150 dashboard 360: Falcon - 500gb drive hacked with hddhackr, not flashedi Xtreme is a really old hacked DVD drive firmware which allowed burned games to be loaded on the Xbox.
Chances are a dashboard update has flashed the consoles DVD drive firmware back to the stock unmodified firmware.
4.) You will be automatically prompted to update with a USB stick, with a CD / DVD it should say Mixed Media Disc, power down the 360 and power it on again. I will only reply to Digiex related issues via PM, not general help requests.
Note: The USB flash drive must use the FAT32 file system.
How to install: 1.) Unrar the download 2.) Copy the $System Update folder to the root of a CD or USB Stick (The memory stick must be FAT or Fat32 formatted) 3.) Insert the CD or USB Stick into your Xbox 360 console.