Hd400 power Hi, I've owned the HD400 for a few months. It's worked very well up till now. It suddenly will not power up at all. There is no power switch, simply connecting the power supply is how I usually turned it on. I confirmed that it is NOT a power supply issue external to the unit. There doesn't seem to be any damage to the power connector on the unit. Also, I did not purchase it new so I cannot return it. It was passed on as a gift from a friend. Any suggestions?

I would suggest a reboot first, then if that doesn't fix it, contact Line 6 customer support. Video Tutorial POD HD300 400 Factory Reset POD HD300 400 Knowledge Base...

Try doing a reset as explained in this video-
http://line6.com/support/page/kb/_/pod/pod-hd300400/video-tutorial-pod-hd300-400-factory-reset-r214

Sounds like bad power supply capacitors

How new is the amp?

A single faulty solder can do that...I'd try returning in to the seller.
Have you tried a different amp with the same equipment?

Sounds like a wiring issue.

Hope I've helped
PvT

I've had both very good and very bad customer service from Line 6 over the years, Personally, Id take it back to GC and have them explain what you need.That way if it's a case of a defective item, they can replace it on the spot,

First thing... make sure you are using the KA320 power adapter with it. We will work from there.

The unit probably is sensing an error of some type. Check these things: That NO key or button is STUCK down. Next, one could try reseating the memory sticks if you have expanded memory.

Let me know if you find a button or key is stuck down (not uncommon when unit has been wrapped) or you are using the wrong power adapter.

If the bridge pickup has no continuity, replace the pickup.
I the pickup has continuity replace the switch.

Hi there,

Well you may follow the link below to get your manual -

http://cachepe.zzounds.com/media/Line6PodHD400QuickStart-12fd8b27f633e744690f694ab6a375fc.pdf

Good Luck!!

Thanks for using FixYa!!

This sounds like a power supply problem. SInce the unit is brand new, exercise your warranty immediately. Don't mess with it and risk voiding the warranty.
If YOU supplied the power adapter, that is LIKELY the problem. This unit take one that is capable of 3 amps. (2.5 amps minimum) Most pedal adapters will NOT work with this unit as they don't have adequate current output.

For anyone who still has this issue including above morris_gray,
I've encountered this myself with my first generation M-Audio Axiom 25 USB MIDI Controller plugged into a MacBook using GarageBand (G2 apparently has identical malfunction).
It should be noted that I never installed any type of software for the device, that came with the device. I simply wanted a controller for GarageBand, and I will also note that it has worked flawlessly for about 4 years on this setup, until about a week ago...

I'll provide what information I have gathered about the blank LCD screen issue as well as the controller simply not functioning correctly as listed below:
The most common way people test/fix this is to "hard reset":
- turn controller off (assuming you've kept the usb cable connected to your computer)
- hold down both the + and - buttons directly below the lcd, and simply turn the power on. Some numbers should appear on the lcd soon after the reboot and you are okay to release said buttons...
I've read testimonials, watched videos of people doing this and successfully getting their device back in action, though the reset will default anything you have saved for the device.

Sadly, this did not work on mine. I've tried several different cables- in several different usb ports- on several different computers (as suggested by M-Audio on their support page. I still get a lit up but blank lcd. I've even tried to still use it but only some awful noises come out and nearly every function just makes the thing freak out and it becomes silent/unusable/useless.
M-Audio suggests sending it back to them for fixing at this point.
Because I've had my Axiom 25 Gen. 1 for so long and I have never installed anything what so ever that came in the box, and have little faith that M-Audio will replace mine, I will most likely try to take it apart and mess around with the electronics inside as it's just a big paperweight now.
I did read that in the Gen. 1's the blank lcd could be a result of a chip gone wrong, so to speak... Gen. 2's had some type of "grounding" issue that resulted in the blank lcd and such.
I hope this helps anyone, if I stumble upon a way to fix this through my own curiosity I will inform the masses...
I'll be on the hunt for a new controller most likely and it probably wont be an M-Audio...not that I'm upset with the product, it lasted me quite a while and I've made a lot of solid songs/music with it, but rather I feel the need for something different and maybe a little more sturdy that can actually be a synthesizer on its own, not just a controller.
- Christoffer