CCS/UCD3138A: Interference during flash programming leads to connection failure

Part Number: UCD3138A

Tool/software: Code Composer Studio

Hi TI Experts,

I have this question. CPU is 64 pins UCD3138ARGC. While I programming flash, I turn a device on(an electronic load), the programming procedure stopped, then I can still connect to ROM Boot loader, and can download the program again. When I turn off and on again, the CPU cannot be connected, whatever in ROM mode or in flash mode. The program checksum has not been written.

Could you help me with the following questions?

1.What happened with the ROM Boot loader?

2.Can I recover the CPU with PMBUS connector or JTAG and how to do it?

3.Can I refresh the ROM Boot loader?

Thank you!