A manufacturing defect on some printed circuit board assemblies (PCBAs) within a single lot of PCBAs may cause damage to other internal components during assembly which may result in unintended electrical stimulation when using the transcranial stimulator and low current stimulator during the same procedure. IOMAX cortical modules manufactured between 02/15/2024 and 05/07/2024 may have been shipped with the defective printed circuit board. Recall start date: May 17, 2024