03 LX470 nav/radio/climate problems (1 Viewer)

[Kav]

I have a 2003 LX470 with ML audio. I was putting an aftermarket amp and sub after the stock blew. Everything was almost finished and the nav screen went black, with the radio not turning on. The climate remained on the same settings until I reset the battery terminals. Every fuse has been checked and are fine... the only part that still works is the bottom row of buttons, like the rear defrost etc. I am worried because of the difficulty in finding the new head unit anywhere, and the price. The person helping me said they may have shorted the system somehow...