The Arria II GX FPGA development Kit failed to configure FPGA at power up

Hi,

I've been using the Arria II GX FPGA development board for 6 month without any problem but encountered a problem yesterday. When I power up the board, the Load LED illuminates, but shortly it goes out. Then the Error red LED illuminates. When I try to do the auto-detect in the programmer, the FPGA is shown as UNKNOWN device in both methods of using embedded USB blaster and external USB Blaster cable. I also tried both with and without the MAX II CPLD EPM2210 System Controller in the JTAG chain) and got the same problem.

I am in the middle of testing my design and desperately need help !!!

Many man thanks,

Scott