Azbox booting display

Hello .. Please hellp.

The receiver display is booting. To connect RS-232 putty error.( Checking zboot signature.. it's not zboot file.)
(Error : Internal, code = ffffffff.) What to do???

********************************* *
* YAMON ROM Monitor
* Revision 02.06-SIGMADESIGNS-01-2.8.0.1
********************************* *
Memory: code: 0x11000000-0x11040000, 0x11200000-0x11204000
reserved data: 0x11240000-0x12440000, PCI memory: 0x12440000-0x12840000
Environment variable 'start' exists. After 1 seconds
it will be interpreted as a YAMON command and executed.
Press Ctrl-C (or do BREAK) to bypass this.

xrpc failed (9)--- if a xtask is using a cipher or if you reboot
--- xrpc will fail with RM_BUSY
Checking zboot signature.. it's not zboot file.
Error : Internal, code = ffffffff
YAMON> ****s
Error : Command not found : ****s
YAMON>
YAMON>
YAMON> xrpc faSAMON> AAAMON> xrpc faSAMON> AAAMON> xrpc faSAMON> AAAMON> xrpc fa
SAMON> AAAMON> xrpc faSAMON> AAAMON> xrpc faSAMON> AAAMON> xrpc faSAMON> AAAMON>
xrpc faSAMON> AAAMON> xrpc faSAMON> AA