The instrument panel has failed at a board level. There is no way to test it even if removed. So, go to a salvage yard and get another one to replace it.
Nov 14, 2012 at 9:13 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.