One of my friend told me like this : ” If you have a MB SD Connect C4 and its Locked,you do not need buy a new one ,just change this chip , all will be okay ” He also side ” You can try with it but also has risk ”
Here is his experience shared with us :
PCB modification procedure:
1- Carefully open the sd connect multiplexer
2- Check whether some part is easy broken
MB SD Connect C4 printed circuit board in a good condition should be:
3- Possible occasion:
Maybe batteries leaked and damaged the PCB.
4- Blow the chip marked with a red circle by a electric hair drier
5-Disassemble the chip
6- Write the program to a new chip
7- Install the new chip to the PCB, then assemble PCBs into SD connect c4 mux
8- Start SD c4 mux
9- Connect MB SD C4 multiplexer to the laptop
10- SOLVED! And work like a charm, as a good SD Connect C4 at obd2shop.co.uk
Done ! That’s all my friend shared with us.
Hope it would help you.
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