It was reported that the cardiosave intra-aortic balloon pump (iabp) was alarming while powered off and connected to ac power.It was also reported that the issue was a repeated discrepancy and only happened every 4 months and that the customer had to unplug the unit and remove both the battery packs to end the alarming.A getinge field service engineer (fse) was dispatched to investigate the issue.The fse replaced the cart wiring harness and drained both batteries for about 30 minutes.Then, the unit was left plugged in, powered off, and charging.It was later stated that another fse took over the repair.The new fse stated that fault code was found had occurred 43 times.It was also stated that the main manufacturer was able to reproduce the fault code and suggested to replace the solenoid driver pcb.So, the fse replaced the solenoid driver pcb as requested and continued testing the device after replacing it.Then, the fiber optic module started failing and was not being recognized.Then, the fse checked the software revisions and fiso was displaying "x.Xx".With further investigation, the fse discovered a film of an unknown substance in the back of the backplane pcb, where the executive processor and the front end pcb connect to the backplane pcb.The fse stated that the solder joints on the connectors were discolored and questionable and that the substance did not appear to be saline.So, as a precaution, the fse replaced the backplane pcb due to its appearance.Also, it was noted that the backplane pcb could have been the contributor of all the problems.The fse then retested the fiber optic module and issue remained the same and order the part.The fse retested the unit before replaced the part to verify the failure was still there.And noticed that the fiber optic module was no longer failing and the 1.20 rev software returned.The fse replaced the fiber optic module as a precaution.The fse the performed functional tests without any further failures or alarms.The fse reviewed the logs and the logs were clear.The unit services were completed.All safety, calibration, and functionality checks were done to factory specifications.The fse customer with the customer and the customer verified that there were no issues over the weekend.The unit was released to the customer and cleared for clinical use.The final investigation has been completed by failure analysis and testing department.Retaining the "investigated part" in the failure analysis and testing department per procedure.
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