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DLPC4422: DLPC4422 : EVM the bootloader destroyed

Part Number: DLPC4422
Other Parts Discussed in Thread: DLPDLCR660TEVM, DLPLCRDC4422EVM

Hi TI engine,

Hardware: DLPLCRDC4422EVM  , DLPDLCR660TEVM.

A wrong operation causes the system bootloader to be erased. We're sure it's erased.

The EVM board is now connected to the PC, and the PC can't find the device. 

How should I fix bootloader?

1 We have some JTAG and other burning tools.

2 We have already browsed webpage with similar problems.(https://e2e.ti.com/support/dlp/f/94/p/945802/3506573?tisearch=e2e-sitesearch&keymatch=DLP660Te#3506573,