Hi Scotty:  I love your shows, keep up the great work sir!  
I just bought a 2002 Acura MDX with 160k miles for my son as a X-mas gift.  Car was fine, no issues found at the time, except the navigation display had a big burn mark in the middle.  so, I picked up a display unit from the junkyard and replaced, when I turned on the car I smelled electrical burn from the display so I returned back and ordered another one from eBay.  The new display is fine no more burn mark.  But, I noticed my dashboard all the meters:  RPM, speed odometer, fuel, temperature gauge are all dead, as the engine is turned on. I checked all the fuses, 7.5, 15, 20,and 30amps are all good. How do I fix this, please help?  Thank you sir!🙏🙏🙏