Ronald Kools: It's a heat problem on the DSP. See the video by Dave Muri (3 replies down).
AXE SLINGER: CHECK THE VOLTAGE COMING OUT OF YOUR PLUG AT HOME..it could be as simple as that???
Dave Muri: Here the same problem demonstrated in a Spider III. I show which part is the root of the problem. It's a very difficult job to replace the part itself which is only $20. The problems is, to replace the board Line 6 wants about $160! Search for the YouTube video "Demonstration of and solution to an intermittent problem with a Line 6 Spider III amplifier"
oldboatclub: I work on amps for a living. If you buy one of their products, you must have the mindset that it is a throw-away product. WHY? Because they produce products that are failure prone, and they don't provide support for them past a couple of years. This means that if your amp is over 3 years old, replacement parts are NLA. Your amp will be worthless. If you want modeling - then buy a POD and hook it up to a reliable AMERICAN or BRITTISH amplifier.
thehardcoreguitarist: Wouldnt u know it. I have the same amp... Barely used. And it cuts out. Sucks. I had high hopes for such a "good" amp.
gitchist: If you press the d button and hold it when the amp is off and turn the amp on while still holding the button down it will factory reset the amp . My amp has issues beyond this. First the pedals on the floor stopped working and now the head totally stopped working. I like the amps when they are working right but man what a POS
wtfwasthatt: @richeyrock Black Magic, of course.
David Pierson: @richeyrock its a weak relay in the signal chain or the firmware is sensitive to voltage
nanidansaren: all it might be is your tubes. that happened in my buddies amp and we both have the pider valve HD100.
fuct001: just a thought mine did this twice and it was only cauze the power cable wasn't plugged all the way into the back. which happened after my bass player got a 15" hooked up to his stack so just make sure its the power cable is plugged in all the way if not it resolves this issue... also if the pedel tripps out then turn off the amp and hold down the D pedel and turn it back on and it fixes/resets the pedal (no u don't lose settings) just resets the pedal to amp connections
I was going to post a picture I took of this assembly but uTube won't let me (st00pid).
EvolDiesel: To clarify further...
The old PCBA
Date MFG: Jun 8 2007
...was replaced with the latest PCBA
EvolDiesel: For the next guy who goes looking for this, here's the answer...
Problem: Malfunctioning DSP Board
Solution: Replace malfunctioning DSP Board
Cost: $209 (parts and labor)
Who: Authorized Line 6 repair center
Time: About a week
Pablo Calor: yes, this issue happens in low price models like spider 3, a lot of lights shining but no answer from the amp
hullupesukarhu: @mant2000 Had the same problem. The guy told me he replaced the mainboard if that helps you.
joshdrockss: Take it in a music store.
sweethouze28: Be careful!!! check for the PREAMP tubes !!! in my combo mkII one of the 2 pream was not seat correctly and IT MAKE my amp sound cut and buzz...reset...ect...check it out!!!
fine_djentleman: Mine just popped hella lod on me and now no sound is comin through
And its definately the amp i tried every cord and guitar i own
richeyrock: @mant2000 I wish I knew. They didn't tell me what they fixed and none of the paperwork detailed any parts.