Hello,

  Did you perform a factory reset on the unit?  If so, you will need to take the unit to a service center for diagnosis and repair.

See the following links for more information:

Amp Troubleshooting

http://line6.com/community/docs/DOC-4488

Factory Reset Procedures for Line 6 Gear

http://line6.com/community/docs/DOC-4499

Product Repair

http://line6.com/community/docs/DOC-4285

I have the exact same problem with my AX2 (started about 2 years after I bought it). The amp has been collecting dust in my parents' basement for the last 4-5 years. Would be really nice if someone knows how to fix it since it hardly serves as a practice amp in this condition...

some additional discoveries:

* Sometimes it works fine for several days and other times it is completely useless

* I have found out that if I punch on top of the amp really hard, a very loud noise comes out and then the gurgleing noise stops for the moment (does not work every time though). A few minutes later it's usually back. This led me to the conclusion that perhaps the problem is an intermittent connection (glitch?) inside the amp. So I handed it in to a service technician (a friend of my dad who usually fixes tvs and stuff). He didn't have any previous experience with digital amps but at least he was more qualified than me. Unfortunately he couldnt find anything strange about it.

1....Check the solder connections on the 2 chips (mosfets) that the heat sinks on the rear of the amp cool.

Look at the connections with a magnifying glass as some times its very hard to tell.

The solder connections to the board from these chips get broken and move a little from Vibration and Heat.

If there good: go to step 2.

2..

Clean then Re apply a quality thermal compound (Like Arctic Silver) or equivalent 

to the 2 heat sinks and on the 2 chips that the heat sinks cool.

Use a credit card or similar to spread the thermal paste, I use (Arctic Silver).

do not slob it on like the factory, it works better with a thin layer. (also the factory uses that cheap white crap).

Be very careful not to over tighten the hex bolts (2 of them) 1 on each chip, holding the chips to the head frame and heat sinks.

Also do not over tighten the nuts on the quarter jacks on the rear panel.

NOTE: When working with delicate electronics always wear a wrist grounding device.

Hi, not sure if the gurgle that you are describing is the same as I suffered, however, I recently dug the amp out from the depths of my garage to start gigging again and had nothing but a whole load of noise which I can only describe as trying to tune in an old radio with lots of digital oscillation and distortion, this was affected by turning the pots ( would change the frequency and change speed etc).

The main thing is I have fixed it and this is how, I followed the advice of moberi ( many thanks ) who has offered info on this post, and fitted the heatsink to the voltage regulator, I also replaced all of the pots and all of the radial capacitors on the main PC board, a bit fiddly, but if you've got a soldering iron, a solder sucker and a steady hand its worth it. It appears that that the audio signal goes straight into digital through an analogue to digital convertor early on, so any issues at this initial stage is then processed digitally and then converted back Digital to Analogue and then amplified. I think the problem was fixed as one or more of the capacitors at the first stage in the DSP had gone dry, which can cause all sorts of electronic problems. Give it a go

We must keep these legends alive between us, check out the group I have set up where I am urging Line6 to help us support these amps.........Good Luck. TB

Hey I have been using these amps the AX2 212 2.0s for over 10 years. I have owned 5 at different times and currently own 3, and 4 floorboards. I love these amps and when they are performing optimomly they are great, but as those of you who are experienced Ax2 users may have encountered this "digital noise" phenomenon or will encountered, I have encountered several times.

  First, I invite you to listen to just a little bit of what these amps are capable of at www.mansfieldparkmusic.com this is my band and all guitar parts where recorded with an AX2.

  Now I will tell you what I've discovered...quick back story,I was checking what I considered my "spare" for some upcoming road work and it played for about 5 minutes and then went into the fulldigital static squeal that never ceased, mind you it had already been previously programmed with the appropriate settings before hand. I took it to an authorized Line 6 repair facility, because this was the first instance it was ever this bad, as some of you may know, the "digital noise"static does have the reputation of coming and going which actually led me to believe maybe it was a build up of static electricity. I still havent completely ruled out the effects common static electricity may have on the amps, but upon inspection by the technician I was told that is was a common occurence and that ALL digital amps will eventually breakdown just ike your cd player or dvd player or flatscreen tv or ANY other DIGITAL device that there is EVEN IF YOU DON"T PLAY IT! Then I thought about it... Digital stuff, new technology does not last because its built in China, how printers and pc monitors etc had I replaced in my life? And It may last a little longer if it is used less, but eventually the inevitable. They are manufactured with chinese componants that simply just don't last very long. The same problem extends far into all aspects of large purchase items unmusically related including cars but that's another story. The tech said that since Line 6 didn't have the boards or componants anymore, he would have to rebuild the entire board by hand for about $300, so when you weigh the options, you can either rebuild your amp every 10 years or so, or as the tech said, " Get a good tube amp, they're much cheaper and easier to repair or modify". My heart sunk...So there it is the mystery is solved. If you're anything like me, you wrestle with this every waking moment...let me know how you fair!!!

kh

guitarist MANSFIELD PARK

www.mansfieldparkmusic.com