Mmi 3g not turn on

[lutrux]

Hello everyone, after a reset in the MMI audi a7 with the combination of the three keys, already done in the past with success, would not light up. The keys are not illuminated and the monitor does not come out even if you press the appropriate button on the left. The current seems to come because I hear the sound of the hard disck and reset with the key combination makes me feel the classic sound of what you take away the current MMI. What can it be? If it were a fuse current should not get the MMI. It may be the amplifier or the same mmi?
Thanks

[RAF_S7]

Everything is controlled via the fibre optic cable. Make sure it's not disconnected anywhere....

[lutrux]

thank you, I did a vag scan, here are the errors:
Address 19: CAN Gateway (J533) Labels: None
Part No SW: 4G0 907 468 E HW: 4G0 907 468 A
Component: J533--Gateway H08 0213
Revision: -------- Serial number: 00000000042731
Coding: 00CD077D00
Shop #: WSC 02391 785 00200
ASAM Dataset: EV_GatewUDS 001025
ROD: EV_GatewUDS_AU57.rod
VCID: 326BFC4365DABA8E527-8067

Battery Monitoring Control Module:
Subsystem 1 - Part No SW: 8X0 915 181 HW: 8X0 915 181
Component: J367-BDM H07 0140
Serial number: 00000000005650038713

Voltage stabilizer:

6 Faults Found:
5055 - No Communications with HVAC Control Module (J301)
U0164 00 [008] - -
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Reset counter: 67
Mileage: 181019 km
Date: 2016.08.18
Time: 16:01:20

4875 - No Communication with Instrument Cluster
U0155 00 [008] - -
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Reset counter: 76
Mileage: 182119 km
Date: 2016.08.29
Time: 12:52:50

4224 - No Communication with Engine Control Module (SAE ECM/PCM)
U0100 00 [008] - -
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Reset counter: 71
Mileage: 181258 km
Date: 2016.08.20
Time: 22:26:04


0269 - Optical data bus
U104A 00 [009] - No Communication
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 63
Reset counter: 37
Mileage: 182048 km
Date: 2016.08.28
Time: 11:37:16



It has failed the mmi? Consider that the current comes to blows because extracting it from the compartment and doing the reset feel the power that comes and goes with the HD noise

[lutrux]

after a reset of the errors and re-scan, are the three errors found:

3 Faults Found:
6151 - Instrument Cluster Control Module on Optical Bus
U10C0 00 [009] - No Communication
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Reset counter: 37
Mileage: 182135 km
Date: 2016.09.01
Time: 04:14:13

6221 - Control unit for information electronics 1
U1054 00 [009] - No Communication
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Reset counter: 37
Mileage: 182135 km
Date: 2016.09.01
Time: 04:14:13

6226 - Radio
U1066 00 [009] - No Communication
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Reset counter: 37
Mileage: 182135 km
Date: 2016.09.01
Time: 04:14:13

[RAF_S7]

No communication is a classic fibre cable issue.

The fibre is connected in series to every MMI component, so if one component is off (fault or fuse) or the cable is disconnected anywhere in the chain, all components upstream of the fibre fails. Unfortunately the only way to trouble shoot it is to examine the cable, and check the fuses of the components.

The fibre is the really thin orange "wire" usually contained within some protective black tubing.

Have you had any of the MMI components out recently, or any work done that could disturb them?

[lutrux]

No, just after reset (already done in the past several times) it is no longer turned on nothing.
In your opinion could be the mmi or the radio unit? Also it is known that the mmi restarts itself after x minutes, because I hear the classic sound.

[RAF_S7]

Are you following this reset procedure?

http://mr-fix.info/audi-mmi-force-restart-reboot-2g-3g/

Audi MMI force restart procedure – 3G+

Locate button: big control knob
upper-right soft button
TONE button
Press and hold those button at the same time.
After two seconds release buttons. Audi MMI screen will go black for few seconds and system will reboot.
If your car does not have TONE button, use MENU button instead.

Do you have the hidden green menu enabled, and have you changed any settings?