Why my computer can't find the the GMS862 modem

GPS/GNSS Development Boards
1

I got the rs232 sparfun gm862 eval borad. after plugin and power on, there is a green flash. I open the hyper terminal and set 8N1 9600. I type “AT” but “AT” not show on the hyper termnial. I removed the RS232 cable, I got the same result. Why I losed GM862 modem? Did I miss anything during the setup?

Thanks

2

Some wireless modules will not respond because they are set up in hardware flow control mode. Try changing hyperterminal flow control.