Pioneer DEH-3350UB shut off while driving - anyone had this happen before?

[Astranomical]

A couple of weeks back I installed a Pioneer DEH-3350UB in my car. Its a great head unit and I'm really quite happy with it. Given that my car doesn't have a standard DIN size slot for the head unit, I have it installed with a dash pocket that has a compartment underneath for storing stuff, which I usually put my phone (crappy Telstra T100) in while I'm driving.

Anyway, I was driving home this afternoon, Top Gun soundtrack up loud as per usual, when I started hearing interference that sounded like the type that a mobile phone would make. Then the head unit suddenly just shut off, like as if it lost power. I then turned it back on and it has completely gone back to factory default settings. Display, Time, EQ, everything has been reset back to default. After that it worked as normal for the rest of the trip. So I have a couple of questions:

- Has anyone had this happen to them before?
- Is there any way that interference from a mobile phone can cause a HU to just shut off like that?
- For now I just have stock speakers (currently saving and plan to put better ones in), while I'm not sure what the stock speakers in an Astra are rated at, from what I've read they're underpowered even for the stock HU (which puts out 35W as opposed to the Pioneer's 50W), while I am careful not to crank the volume up too loud due to the fact that I could destroy the speakers, is there any way that the HU may have gone into some sort of protection mode?

[StoneX]

If the settings were back to default, it means it lost power to the yellow wire in the loom. Your wiring needs to be checked and fixed.

[MrNutter]

Yup you lost power to the HU. Check your connections & earth. If nothing seems amiss then rewire both the power & earth anyway & make sure you do it properly.

[Astranomical]

Ok I took the HU out this morning and had a look - when I installed it I soldered and used heat shrink on the connections, nothing is loose, everything still looks as it did when I first installed it.

[MrNutter]

Double check that the earth is solid. Make sure that there's no rust under the earth connection & be sure that all the pain is removed from the earth area if it is to a painted part. Follow your power wire all the way back to the battery to check for loose connections. Make sure your battery leads & terminals are clean & tight. Check all the wiring, especially behind the HU for any breaks, nicks, cracks or splits. If your wiring attaches to the HU via a plug make sure that it is actually plugged into the HU properly. Apart from that I'm out of suggestions. Other than a fault in the unit itself, which I really doubt, it has to be a wiring problem.

[Nic92]

unless it was a cheap jap one like i have which resets to default settings everytime i start the car (lol)

[StoneX]

Yup you lost power to the HU. Check your connections & earth. If nothing seems amiss then rewire both the power & earth anyway & make sure you do it properly.

Haha. How did I think it was only the power wire and not the ground