RB450G SERIAL CONSOLE SHOW GARBAGE DATA

Hello,
Our RB450G suddenly goes offline.. and there is no ip connectivity.. also cannot access to mt using mac address. RB current version was 5.17 .. we tried to access via serial console but it was showing garbage data, can any one facing same type problem, please help me to solve this issues… When inserting the power jack to power port of RB450G, it was beep once, then flushes all the port.. and then only blue led..
I will be glad if anyone reply this message and showing me some procedure regarding this issues.

bellow i paste serial console garbage data, data copy from windows xp hyper terminal.

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sorry it is solve, i was put hyper terminal data rate 9200 but it will be 115200..