Newest version controller V4.61 showing major current usage when off

Hi, ive had this bms running ok since installation about 2 years ago with the latest all in 1 monitoring board.

Last week, out of the blue, the bms was showing im importing over 2kw of energy when the battery is disconnected from the inverter, or even when the inverter is powered off.

any idea what component has blown on the board for this to happen ot should i change all the components to do with the current shunt.

Thank you.

Anthony.