A user facility biomedical technician (biomed) reported that the power switch from a fresenius 2008t hemodialysis (hd) machine had failed.
The screen would not turn on at the start of the day and the machine was pulled from service for evaluation.
During troubleshooting, the biomed noticed that the power switch was not clicking.
They unplugged the machine and checked the wire on the switch, which was when the pin came right off.
Furthermore, the pin looked charred and blackened.
There was no burning smell, smoke, melting, or arcing noted, and there were no reports of sparks or flames.
No damage was identified on any other components.
The machine was plugged into a hospital grade ground-fault circuit interrupter (gfci) outlet, and there was no previous history of the machine failing the electrical leakage test.
The biomed stated there were approximately 15,000 hours on the machine at the time of the event.
To resolve the reported issue, the biomed replaced the power switch and two fuses on the power logic board.
The machine was re-wired and put through testing.
The machine passed all testing and was returned to service.
The replaced parts were not available to be returned for evaluation as they were reportedly discarded.
Photographs of the charred pin were also not available.
There was no patient involvement associated with the reported event.
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