VVDI Key Tool Plus Self-test FPGA Certification Error Solution

Problem:

During attempting reading BMW CAS4 d-flash with Xhorse vvdi key tool plus and CAS4 solderless adapter, get this error message: ‘self test error, power module exception, fpga certification error’ anyone got any ideas?

Solution:

There is something wrong with the PCB. You’d better send it back to repair.

Here are the steps to remove the PCB.

Step 1: Loosen the screws on the back of the Key Tool Plus

• On the edge of the device: 8 screws
• Middle position of the device: 4 screws

Step 2: Remove the cover

Step 3: Follow the pictures as below to operate one by one