Chanceit

2005 A8l screen coming on then going out
bypassed each module and still same results
Not sure where to go next
Help!!

ltooz_a6_a8_q7

There must be an optical device(s) is broken, bypass all to see.

Chanceit

I tried bypassing the modules there is no signal going back to the front to complete the loop 🤔

ltooz_a6_a8_q7

How did you determine which one is bad?

https://www.dognmonkey.com/audi/what...-audi-mmi.html

Chanceit

I didn't it still turns on then shuts off
Only way it turns on is if I bypass the interface itself
But then it says no signal to the modules which of course cause I bypassed them

Chanceit

I have light to the three modules in the trunk

maxandtara

Not a lot to go on... Give background on the car.... How long have you had the car before this thing happened. Did water get into the car?

VCDS scan ?

Chanceit

I had the car 3 months bought it like this thought I could get it figured out but came to a halt

maxandtara

What are the things you worked on during the past three months?

Your issue is vague. The way you presented your problem assumes your MMI is working, so the way Louise responded to your question assumes your MMI is working.

If your MMI is working, you would get the outcomes Louise has mentioned

Have you considered the possibility that your MMI is faulty?

The MMI easily gets damaged from water intrusion. Over the life of my car, I have replaced mine twice.

Chanceit

I bought a new mmi controller board
I ve been checking and replacing fuses also new battery old was at 10v
cleaned the center console plus taken apart and cleaned
Checking for the fiber optic loop signal Through the modules and still no where