Updated fields: b4, d9(device available for eval), g3, g6, h2, h3, h4, h6(investigation type, investigation findings, component codes & investigation conclusions), h10.The fse that encountered the issue evaluated the unit and found solenoid driver board was out of the correct voltage range.There were no logs available as they had been cleared before this issue was discovered.The fse attempted to boost the voltage using board switches.To resolve the issue the fse replaced the solenoid driver board (0670-00-0639).Full pm, safety, calibration, and functionality checks passed factory specifications.Returned to clinical service upon completion.The maquet failure analysis and testing dept.(fat) received part number 0670-00-0639 pcb,solenoid driver with a reported unit failure of solenoid driver board has low voltage readings.The failure analysis and testing dept.Installed part number 0670-00-0639 pcb,solenoid driver into the cs 300 test fixture and tested the board to factory specifications per the cs300 service manual.The fat was able to replicate the failure of low voltage readings when the calibration procedure for the board was performed.The board failed testing.Part no longer able to be tested by the supplier.Investigation is complete.Retaining the part in the failure analysis and testing department per procedure.
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