1. Please measure the red and and black wire to check if there is 12v voltage, see image
- measure the voltage of red and black wires .png (875.17 KiB) Viewed 13962 times
2. Please measure the red and yellow wire to check if there is 12v voltage, see image
- mesaure the voltage of yellow and black wires.png (891.68 KiB) Viewed 13962 times
3.If there are 12v on red and yellow wires,maybe it is due the the cpu board is not touch totally with main board, then you need to open the car stereo and press the CPU board. About how to open the car stereo, pls refer this video
- CPU Board.png (1.22 MiB) Viewed 13962 times
Notice: There are more pins in the main board, please check if CPU board connected perfect with the pins.
- Black Pin.png (1.99 MiB) Viewed 13962 times
After pressing cpu board, if the car stereo still can not open normally, maybe it is a defective unit, pls contact customer service to get further support.