This report is being supplemented to provided additional information based on the legal manufacturer¿s final investigation.The following sections were updated: a1, d4, d10, g7, h2, h4, h6, and h10.Based on the legal manufacturer¿s investigation, the dhr was reviewed and there were no problems found during the manufacturing of the device.The device met all specifications at the time of shipment.An olympus field service engineer (fse) was dispatched to the user facility and confirmed the reported issues.During the inspection, it was found that the main board was faulty, which caused an alarm.It was also noted that one of the screws on the housing is broken.The cause of the issue was determined to be the failure of the pressure sensor mounted on the main circuit board.The cause of the failure of the pressure sensor mounted on the main board appears to be that oxygen entered the device and the electrode of the pressure sensor was oxidized and corroded.The wiring inside the pressure sensor was peeled off due to the oxidation corrosion.In addition, foreign matter (epoxy) was adhered due to a mounting mistake of the part on the board.Because of the adherence of the foreign matter (epoxy), the wiring inside the pressure sensor was peeled off.When confirming the contents in the instruction manual regarding the indication phenomenon, the following was described.There were following descriptions in 7.1 "troubleshooting guide".·problem: all leds are turned off.·possible cause: an error is detected in the internal circuitry of this product.
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