LP-MSPM0C1104: can't download or debug

This is my board, plus.

3365.Unlock MSPM0 1.1.pptx

Please try to unlock MSPM0.

hi, Eason:

     I didn't remove any jumper as I used a launch pad as shown above and it seems unnecessary to do so per your ppt, and I tried the 3 methods but failed, can you help to check if I missed anything? Thanks.

Bill

What do you mean failed. You fail to do the factory reset or after you do the factory reset the MCU still can't work normally. If the MCU still can't work, I would suggest you to replace it with a new MCU.

fail to do the factory reset, my board is not the same as the one you share in ppt. Pls see the screenshot above.

I know. But the flow is same. Please ingore "Method 0: Make device enter BSL". Please try Method 1, as this device don't have ROM bootloader.

yeath, I've tried method1, can't connect at step 5.