TMS320F28335: F28335下载不进程序

请问一下，之前能下载程序正常工作，焊了个接插件之后就无法下载程序了。出现以下报错（Error connecting to the target:
(Error -1015 @ 0x0)
Device is not responding to the request. Device may be locked, or the emulator connection may be unreliable. Unlock the device if possible, and power-cycle the board. If error persists, confirm configuration and/or try more reliable JTAG settings (e.g. lower TCLK).
(Emulation package 5.1.73.0)）

1.9V、3.3V电压正常，晶振正常频率，电流我感觉1.9V的不正常，比正常工作的小，只有20mA。