I discovered my navigation screen is completely blank, my radio not working and all the hands-free audio for phone calls is dead. I checked almost all the engine fuses (including the RAD-1 & AMP-2) as well as the ECU-IG No.2 under the dash. All working. Is there anything else I can do to try to fix this myself. I did find I had a rodent problem under the hood last November which may be part of a “Hybrid System” warning I get requiring a reset every once in awhile (another factor may be having had a Dorman battery rather than a Toyota one). However, the rodent problem occurred over 7 months ago. Any suggestions on what to try next?