Repair 3458A Error 209: Hardware Failure: Timeout – Unable to Read and Error 1

[doangiau3i]

Hi
I have three  A3  board  A/D Converter and Inguard Logic Assembly (03458-66503 board) in Agilent 3458A. If they are used, they have errors: “Error 209: Hardware Failure: Timeout – Unable to Read”  and “Error 114: Multislope Rundown Conversion”. I want to repair them. Who have solution for the described problem or repair them? Please contact with me by email doangiau3i@gmail.com. Thank you very much.