MMI starts and then turns off

[john81]

hi, i’ve got an a4 avant 58plate 2.0tdi . recently mmi stopped working. i press any button on centre console , screen logo comes on and few seconds goes off. i been reading here and brought the loop to test individual modules in the boot. no luck starting mmi. any help will be appreciated . thank in advance.
lights in buttons don’t work either.


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[Gunnark100]

Delete.

[john81]

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[john81]

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[john81]

Delete.

Hi Gunmark,
i’m not sure which one exactly but that’s the photos i took this morning.
my bluetooth stopped working just before i think , the audi emissions update. there was some wet spots in drivers carped and spare wheel compartment last year due to a blocked sun roof pipe.


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[Gunnark100]

Hi Gunmark,
i’m not sure which one exactly but that’s the photos i took this morning.
my bluetooth stopped working just before i think , the audi emissions update. there was some wet spots in drivers carped and spare wheel compartment last year due to a blocked sun roof pipe.


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If all modules(bt,amp,cd,radio,nav) are "properly" tested with loop and all fuses are ok(modules receive power)...then it "must" be headunit behind glovebox.

[john81]

this one? i went with the loop to test but screen did same behaviour . all apart the one on this photo I saw the fibre red light blinking from units. the one on this photo I didn't look if blinking or not

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[Gunnark100]

this one? i went with the loop to test but screen did same behaviour . all apart the one on this photo I saw the fibre red light blinking from units. the one on this photo I didn't look if blinking or not

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No, this is gateway, headunit is next to the blower, so to say straight behind glovebox...but you cant test those with loop(mmi will not wake up if those are isolated).

[Gunnark100]

wait i will double check, maybe on b8 it was behind climatronic.

Update:
You need to remove:

air conditioner operating unit

CD changer -R41- from dash panel

air conditioner operating unit

[john81]

reading around someone mentioned under carpet

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