用OptiFlash刷，不是说先不能接手机吗，但我为什么总显示不能打开com口呢，只有手机开机且接电脑才能显示power on呢，不接手机显示如下，谢谢了
I E1 14:43:37 OptiFlash 4.14 T started
I E2 14:43:39 ThreadGUI started
I E3 14:43:39 ThreadProtocol started
I E4 14:43:39 OS: NT family, Ver:5.1
I E5 14:43:39 Boot loader protocol type: passive
I E6 14:43:39 Memory interface type: 1
I E7 14:43:39 Setup loader: -
I E8 14:43:39 Flash loader: C:\Downloads\OptiFlash_E628\fl_sceptrehp_sgh_hw1_usb.sre
I E9 14:43:39 Flash loader base addr: 0x30080000
I E10 14:43:39 Stack base addr: 0x20000000
I E11 14:43:39 Stack buffers: 2
I E12 14:43:39 0: 0x20000000 - 0x21ffffff [32 MB (33554432 Bytes)]
I E13 14:43:39 1: 0x24000000 - 0x25ffffff [32 MB (33554432 Bytes)]
E E14 14:43:39 Error: Could not open COM4 at 115200 Baud (2)
I E15 14:43:39 ReLoad: 2 (ERR_COM)
I E16 14:43:39 Error code: ERR_COM
E E17 14:43:39 Sorry, an error has occured ! (ERR_COM)
I E18 14:43:39 ThreadProtocol finished
I E19 14:43:39 ThreadProtocol: 2
I E20 14:43:39 ThreadGUI finished
I E1 14:43:37 OptiFlash 4.14 T started
I E2 14:43:39 ThreadGUI started
I E3 14:43:39 ThreadProtocol started
I E4 14:43:39 OS: NT family, Ver:5.1
I E5 14:43:39 Boot loader protocol type: passive
I E6 14:43:39 Memory interface type: 1
I E7 14:43:39 Setup loader: -
I E8 14:43:39 Flash loader: C:\Downloads\OptiFlash_E628\fl_sceptrehp_sgh_hw1_usb.sre
I E9 14:43:39 Flash loader base addr: 0x30080000
I E10 14:43:39 Stack base addr: 0x20000000
I E11 14:43:39 Stack buffers: 2
I E12 14:43:39 0: 0x20000000 - 0x21ffffff [32 MB (33554432 Bytes)]
I E13 14:43:39 1: 0x24000000 - 0x25ffffff [32 MB (33554432 Bytes)]
E E14 14:43:39 Error: Could not open COM4 at 115200 Baud (2)
I E15 14:43:39 ReLoad: 2 (ERR_COM)
I E16 14:43:39 Error code: ERR_COM
E E17 14:43:39 Sorry, an error has occured ! (ERR_COM)
I E18 14:43:39 ThreadProtocol finished
I E19 14:43:39 ThreadProtocol: 2
I E20 14:43:39 ThreadGUI finished