A facility reported a cerelink monitor ((b)(6).) showing out of range values and continued to occur after changing the cables, power supply and moving it away from other devices.Over the weekend, the value became negative (-4).Troubleshooting was done by electrocardiogram (ecg) lead changed, machine plugged into wall and keeping it away from other devices however, it was not resolved.Eventually the numbers became positive but wide swings in the values 2-30, with the low values not in line with the imaging and clinical activities.No patient injury reported.Customer stated that it may have been user error.No additional information available.
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