[what method could be used for diagnosis "JTAG scan chain interrogation failed: all ones" on Arty-A7 board?]

The Jtag was working well before it broke when debugging.
I have tried both freedomStudio and Vivado tools to connect the board, but have following error messages

jtag
probe
Using JTAG
Error: JTAG scan chain interrogation failed: all ones
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway...
Error: riscv.cpu: IR capture error; saw 0x1f not 0x01
Error: [riscv.cpu] Unsupported DTM version: 15
Error: [riscv.cpu] Unsupported DTM version: 15
Error: [riscv.cpu] Unsupported DTM version: 15
Error: Target not examined yet

Error: [riscv.cpu] Unsupported DTM version: 15

 

Thanks