I have an POD XT which when plugged into Monkey via USB, the software stated I needed up upgrade the Flash to 3.1. I clicked to update but the process seemed to take an extrodinary long time to complete and during the process, I noted that the screen of the Pod had 'Error Code 02' dispalyed.
I reset the Pod as requested but as soon as the screen turned on, I got 'ERROR CODE 02'. I tried all the buttons, tried turning dials and nothing had no effect.
On research, I found that Error Code 02 relates to an issue with the Flash Memory. It seems to be a common issue that Monkey updating the Pod can corrupt the Flash, making the Pod useless.
I tried putting the Pod in safe mode using the 'Save' / 'Edit' keys which did nothing. I tried safe mode using the most left black square button, again nothing. I tried the second black square button which put the Pod into another safe mode which checked the memory, this test passed.
On the Monkey, the Flash was greyed out and I couldn't update it. It recognised the Pod connected via USB but couldn't establish the connection. I tried different USB cables, different USB slots, even another power supply and got nothing but the Error Code 02 on the screen.
** SOLUTION **
On a side line building up my rig, I had purchased a second hand Edirol UM-1SX which is an old fashioned Midi USB interface box, which I was going to use with my keyboard. I'd also just purchased a couple of brand new Roland Midi Cables. Once I setup the Edirol UM-1SX with my computer, the Pod XT was recognised by Monkey. I set this up by NOT using the USB cable but just connecting the Pod via the Midi Cables via the UM-1SX. Just an important point with MIDI cables, Computer Out = Pod In and Computer In = Pod Out.
Now the Pod was connected to the Computer, Flash was able to update via Midi and installed to the latest Flash 3.1. Once installed and turned the Pod off and on again, I disconnected the Midi cables and connected the Pod via the USB to use Line 6 Edit. From here, no problems in editing and installing my tones.
Happy days, broken Pod to working Pod. Hope this helps.