bootloader problem with nrf51 dk

[rushin]

i make nrf51 dk device into bootloader and then i copy file now when i connect it in normal mode . comouter can't detect nrf51 dk kit. but it work in bootloader mode. can you help me?

[Susheel Nuguru]

what file are you copying? is it SD, Application or another bootloader? Looks like the DFU went OK but something is wrong while executing your new updated file. You need to debug your new copied file