JG920A - HP Switch - Not running properly

Dear Experts,

My colleague somehow remove / deleted the HP switch files.

When I turn it on, it displays this?

System is starting...
Press Ctrl+D to access BASIC-BOOTWARE MENU
Booting Normal Extend BootWare
The Extend BootWare is self-decompressing......................Done!

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*                                                                          *
*            HPE 1920-8G Switch JG920A BootWare, Version 1.17              *
*                                                                          *
****************************************************************************
Copyright (c) 2010-2016 Hewlett Packard Enterprise Development LP

Compiled Date       : Jan 18 2016 09:58:32
CPU Type            : MIPS4kec
CPU L1 Cache        : 16KB
CPU Clock Speed     : 500MHz
Memory Type         : DDR3 SDRAM
Memory Size         : 128MB
Memory Speed        : 300MHz
BootWare Size       : 3MB
Flash Size          : 32MB


BootWare Validating...
Application program does not exist.
BootWare password: Not required. Please press Enter to continue.


How can I resolve this?