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Originally Posted by jhiggins
Yes the DSP amp came from an E38 and I know about the coding issue I spoke to the dealer about it and they charge like $175 to recode it but like I said there is a coax wire with a broken connector that goes to the front of the car. It comes off the small 4" x 6" x 2" box with heat fins that is screwed to the rack in front of the amp. I can live without the nav screen until I can find a replacement connector but I can't physically get the old amp out. I took out the 2 bolts at the top but i assume there are two more at the bottom and I can't get to them.
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The dealer quote to re-code the amp is a little high, but not totally out of line. Most dealers only charge 1 hour of labor.
The broken coax plug is on your Trimble module (GPS receiver) that is a component of the MKII navigation computer. That is the antenna cable plug, and feeds to the GPS antenna on the rear parcel shelf. However, that alone would not cause the blank screen. You could completely disconnect that module, and the front screen would still display. However, the nav computer would not be able to see any satellites.
There are two screws at the bottom of the DSP amp. However, you do not need to completely remove those screws, since the holes on the DSP amp are slotted.
I suspect that you need a new nav computer. It is possible that you could restore life, however it was broken when you bought the car, so who knows what really happened to it. You can buy a used MKII on eBay for around $250. A used MKIII will run you $300- $400, depending on the wind. The DVD-based MKIV will cost around $750. The MKIII and MKIV are a huge graphics and performance upgrade. The MKIV has even more plusses (covered in other posts).