I spilled juice on the radio head unit of my 2006 Lexus GS300. It is the Mark Levinson Navigation Unit with integrated temp controls. After the spill none of the control buttons around the screen work (nav, temp, radio, menu, etc.), but the touchscreen works. I can control limited functions via the steering wheel or voice command. I tried removing the unit, taking it apart and cleaning the various circuit boards, but it did not work. Can a solution be recommended or do I have to buy a new one?!?

Fuse 26 (Radio 1) Fuse 42 (Radio 2). The most complicated Lexus of all. I was at the launch, and the first time I saw an engine with NO access, all covered up.. I love my ES330 and was at the dealership yesterday and 2 grand lighter!

Fuse Box Diagram Lexus GX470 (J120; 2002-2009)

https://fuse-box.info > lexus > lexus-gx470-j120-2002-...
The fuse box is located in the instrument panel (on the driver's side), behind the cover. The location of the fuses in the passenger compartment: Lexus GX470 ( ...

Lexus GX470 (2006) - fuse box diagram - Auto Genius

https://www.autogenius.info > lexus-gx470-2006-fuse-...
Jul 11, 2017 - Lexus GX470 (2006) - fuse box diagram · Engine compartment · Driver's side instrument panel · Fuses ...

..

Question edited for clarity.
Question moved to Lexus LS430.

Check out the videos. There appear to be issues with the unit.

https://www.google.com/search?q=2001+lexus+LS430+mark+levinson+cd+playing+slow

..

Question translated into written English.
Question edited for full year make model as required.
Question moved to to 2006 Lexus GS300 category

2005, 2006, 2007 are the generation years that remain the same. You could also try cleaning with a light application of acrylic polish.

https://www.google.com/search?q=gs300

https://www.google.com/search?q=2006+lexus+gs300+audio+system

..

Locate the navigation unit and remove the disc and load it back in. I hope that solve your problem.

On this website, you find fuse box diagram and description for Lexus GS300 (2006)

http://www.autogenius.info/lexus-gs300-2006-fuse-box-diagram

you cannot reuse factory amp. you must replace with after market amp

as in no buttons or what.. all electronic controls?? some have 2 buttons.. temp up and temp down..if it shows a number..raise it..

Unfortunately, water based solutions will destroy the navigation system if spilled on the electronic side of it.

Depending on how much was spilled, it probably fried the electronics in the unit, and the entire unit should be replaced.

A code will probably have to be entered in a used unit to make it work after installing the new/used one.

Sorry about that.

The Phantom rides in style......Awesome vehicle
Sounds like an internal fault in the audio switching, check your warranty, since that LX might still be under the 4 years and if so get to a dealer ASAP.
You could go online to Lexus owners club at Lexus .com and search the issue too. Never heard of this one but the LX is a niche market so I don't see tons of them....Is yours a Mark Levinson sound system?It will say on the dash.

Repair Procedure
1. Confirm the customer's complaint of DVD RSE system inoperative.
2. For vehicles with Lexus Navigation System, perform the following procedure to turn OFF the RSE Lock function:
A. Press the INFO button to display the "Information" screen on the navigation unit.
B. Press the "Screen Setting" touch button on the navigation display.
C. Under the "Rear Lock" option, press the "OFF" touch button and then press "OK" in the upper right part of the display.
D. Press the DVD switch on the RSE system, (If a DVD is NOT already in the player, insert one) and confirm screen is "ON" and the system will play DVD's.
3. For vehicles without Lexus Navigation System, perform the procedure to turn "OFF" the RSE Lock function.
A. Push the audio control knob multiple times to cycle through the various options (Bass, Mid, Treble, etc.) until "Rear Lock" is shown on the screen.
B. Turn the audio control knob so the display says "OFF" next to "REAR LOCK".
C. Press the DVD switch on the RSE (if a DVD is NOT already in the player, insert one.) and confirm screen is "ON" and the system will play DVDs.
4. If the above procedure resolves the concern, explain the system operation to the customer. This procedure is described in the "Audio/Video" section of the vehicle owner's manual.let me know lf this helps.