JeffGoobs Posted May 15, 2014 Share Posted May 15, 2014 Greetings, I stopped getting an input signal on my PODxt Pro. I tried various guitar cables, and I reinstalled the 3.02 firmware from the Line 6 Monkey. Nothing else is plugged into the unit other than the AC cable and the input cable. It's clearly not a setting; I can't even get a signal to use the tuner. Seems like a hardware issue, but here's how I've troubleshot this so far; perhaps I've missed something obvious along the way. First of all, it would seem that after some searching, that this issue is not unique to me. Also, for what it's worth, I had (for some reason) version 1.14 of the USB firmware on the unit, despite the fact that the current version was listed as 1.12 in the Monkey. Thinking that this might be the problem, I tried restoring the current version of the USB firmware back to version 1.12, so that they matched. No dice. Repeated power cycles do nothing, and the line level input on the back isn't getting any input signal either. Sending a clean guitar signal through USB doesn't work either, so it obviously isn't getting any signal at the front end. The signal light on the front remains perpetually dark. I have all model packs installed, and the unit has been sitting in a climate controlled rack in a studio, so it is in mint condition. I am at a loss, and am not sure what to do, as I rely on this in my studio. Another follow-up question... Since I rolled back the USB firmware to 1.12, there doesn't now seem to be a way to get it back to 1.14. Most reports I see say that 1.14 is the latest version of the USB firmware, yet the Line 6 Monkey is telling me that 1.12 is the latest. Was there an issue discovered with version 1.14 of the USB firmware such that it was removed from the update servers? I also ran the entire update process again from another computer with a different USB cable. Same deal. Another thing to note is that while the device is fully recognized through the OS, and the MIDI functionality seems to be fine, the audio interface element of the PODxt Pro is not functioning properly. The device is recognized in the Sound System Preference (and the Audio/MIDI Setup) but sound will not come out of it for regular computer sound output (like iTunes, for example.) In addition to this, I just noticed a slight but audible buzzing/hum sound inconsistently coming from the unit, which sounds similar to an alternating current's 60 Hz hum sometimes caused by EMI or a ground loop. I've never noticed this until right now. A power cycle of the unit lessened it to some degree, but it's still there faintly, which obviously causes further concern. Has anyone else with a PODxt Pro experienced anything like this? I'm sure the answer is what I don't want to hear: that I'll need to take it to a service center. Thanks in advance, Jeff 2 Quote Link to comment Share on other sites More sharing options...
TnMike Posted January 31, 2016 Share Posted January 31, 2016 Yes, I can't update my USB firmware. I have USB plugged in to my Podxt Pro and also my midi. It only recognizes my midi. I have to have USB in order to update USB firmware. Running on 2010 Mac Pro, 10.10.5 OS, Line 6 Monkey 1.71. I bought 2 model packs a while back when it was working. I did an update some time ago and the USB stopped working. After that time I was unable to use my model pack add-ons. Bummer...and no answers! Quote Link to comment Share on other sites More sharing options...
bootyhawg Posted February 17, 2016 Share Posted February 17, 2016 I think I'm having a similar if not the same issue. Not receiving input signal from the guitar, no green light, unless I plug in headphones. If I plug in the headphones, then I get a loud hum/buzz. It all started after updating the firmware and monkey stuff. still trying some fixes. if i get one, i'll repost. thnx Michael Quote Link to comment Share on other sites More sharing options...
Driversoft Posted August 7, 2017 Share Posted August 7, 2017 Just experienced similar issue with second hand unit that had previously worked fine. distinct humming with no input from any port. Am plannimng to RMA but wondered if anyobe else hsd an update. Thank you LED Quote Link to comment Share on other sites More sharing options...
cpier Posted January 19, 2020 Share Posted January 19, 2020 Well I'm still looking but the usb doesnt seem to work. Iam wondering if line 6 has ever end sold one of thrir own units in their home town. Quote Link to comment Share on other sites More sharing options...
skydiveboy Posted January 31, 2020 Share Posted January 31, 2020 Dude, in case no signal in or out, this can save you weeks of frustrations, this happened to me..... no matter how stupid it sounds.... are you using exactly the original line 6 power source A.C. adapter ??? not a regular-similar 9 V D.C. power source..... read carefully... the power source its the problem it happened to me... you need to be sure using the original A.C.power source (Not a regular D.C.) ...... iiiiiffff you use a regular 9V D.C. the input signal goes to ground and it does not process anything..... I was using a 9V D.C. and no signal and I spent 1 week doing all kind of updates and contacting techinal support for nothing... after I found my original power source and connected ...voila it works like a charm...I read many guys on internet having same problem and technical support not giving them any answer telling them "send them to us so we can check it up"..... and charge you for that..... use a 9V Altern Current.... not D.C....... do it now Quote Link to comment Share on other sites More sharing options...
daveny5 Posted February 18, 2020 Share Posted February 18, 2020 Perform a factory reset. Make sure you backup your settings before doing so. Quote Link to comment Share on other sites More sharing options...
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