Service 2
Keysight 53210A/53220A/53230A Assembly Level Service Guide 157
DO NOT swap the motherboard, the processor board, or the front panel
board from one instrument to another. These boards contain model number
and serial number information that uniquely identifies a specific unit, and
boards that are mismatched to the instrument may result in problems with
performance, licensing, serviceability, importability/exportability or
warranty.