Echo12 Posted February 3, 2022 Share Posted February 3, 2022 Hi everyone, New member here. I have recently bought and installed an Android media unit which replaces the existing MMI screen. The unit comes with it's own cable harness so no cable splicing was needed. After installation, the unit itself works great but the original symphony unit appears completely dead - the lights on the unit do not light up. As a result, there's no audio coming through and I can't access any of the original setting menus. What I have tried so far: Replacing everything back to stock - the unit still has no power Checked all the fuses, including the one on the back of symphony. All of them are good Check that 12V is coming to symphony Checked for continuity between CAN gateway and CAN+ and CAN+ cables at the head I'm not sure what else to try next apart from buying a replacement symphony unit. Does anyone have any suggestions what could it be? Thanks! Quote Link to comment Share on other sites More sharing options...
Steve Q Posted February 3, 2022 Share Posted February 3, 2022 You've do e a good amount of diagnoses. You could always look at a diagnostic check to see if any fault codes flag up. Quote Link to comment Share on other sites More sharing options...
Echo12 Posted February 4, 2022 Author Share Posted February 4, 2022 Thanks Steve, I should have access to Vag com from next week so will be able to do a proper scan. At the moment, I only have cheap elm327 module and it didn't want to connect to my phone this morning Quote Link to comment Share on other sites More sharing options...
Echo12 Posted February 11, 2022 Author Share Posted February 11, 2022 Friday,11,February,2022,12:56:28:00009 VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64 VCDS Version: 21.9.0.2 (x64) Data version: 20210903 DS330.0 www.Ross-Tech.com VIN: WAUZZZ8K29A149523 License Plate: PK58KDX Address 56: Radio Labels: 8Tx-035-1xx-56.clb Control Module Part Number: 8T2 035 195 H HW: 8T2 035 195 H Component and/or Version: Symphony3 H02 0210 Software Coding: 0502008001010D004359070000 Work Shop Code: WSC 06325 000 00000 VCID: 3D718CF3A471A7616A-8068 1 Fault Found: 02259 - Information Display and Control Head (Front) (J685) 011 - Open Circuit Freeze Frame: Fault Status: 01101011 Fault Priority: 5 Fault Frequency: 1 Reset counter: 217 Mileage: 145958 km Time Indication: 0 Date: 2008.06.07 Time: 22:20:38 Just did a scan on VCDS, this is the code that persists. Mentions of this code on Google mention that it's related ot the power to MMI screen. I guess I'll have to check all the cables over the weekend. What seems a little strange though is that the display test and sound tests options on VCDS both worked completely fine.. Quote Link to comment Share on other sites More sharing options...
Steve Q Posted February 11, 2022 Share Posted February 11, 2022 Hmm how odd. Did you reset the mmi at all? Definitely check the cables. But could be the screen. Quote Link to comment Share on other sites More sharing options...
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