Help~~Futaba 603FS receiver suddenly no response

Help C Hing...

Last night when I turn on the power, the 603 red LED flash a few times and then gone. No response then. Even I change to external battery box still no response. And I change another 603, the system works normally. (I am using EC Power brushness system)

Any possible reason for this?

How can I fix it?

Or where I can take it to fix?

thanks thanks!

行貨就梗係攞返去偉高同維修啦~^_^