Hey Guys,

I used to own an AVH-8400 who's screen kept on freezing while direct sunlight would come in contact with it, sent it in for repair and got a 4000NEX, with the XM module of my old unit not being compatible,i was hoping the GPS would work (The asian tech who always answers the support line in Canada said it would). But it seems like it doesn't. When i press the MODE button i get a black screen.

Today i tried a DVD movie in my new unit, work nicely even with the 8400's bypass, when i press MODE while the movie is playing, now I get blurry writing, somthing about navigation and to press OK, not sure cause it's way too blurry (Attached is a picture).

Now i know my U220 was working fine until I had the new 4000NEX installed, would this mean;

A ) My U220 got friend

B ) Not plugged in properly

C ) Is not compatible with the New 4000NEX

D ) The 8400's bypass is not compatible with the New 4000NEX and while DVDs are functional the U220 is affected by the combination.

Below is what the blurry text looks like:

Thanks for all your help!

according to pioneer, the only compatible navi is the AVIC-U250 and the newer AVIC-U260. I own the u260 and it works like a dream. The u260 has the newer navi system like the Nex 5000-8000, I believe. 

Easily upgrade to Navigation!  2012-2010 AVH models can be upgraded with the add-on AVIC-U220 Navigation system.

Compatible with the following models: AVH-P8400BH, AVH-P4400BH, AVH-P3400BH, AVH-P2400BT, AVH-P1400DVD, AVH-P6300BT, AVH-P4300DVD, AVH-P3300BT, AVH-2300DVD, AVH-P5200BT, AVH-P5200DVD, AVH-P4200DVD, AVH-P3200BT, and AVH-P3200DVD.

Note: The AVIC-U220 comes pre-installed with 2010 map data. You must purchase and install the latest navigation map upgrade in order to have the current software and map database. The most current map and POI upgrade is available from NAVTEQ.

the u220, u250 have been discontinued by Pioneer, replaced by the u260.