The customer reported touchscreen failure.The keypad test failed during est (extended self test) and the unit displayed air valve liftoff failure.There was no patient involvement.The manufacturer¿s field service engineer (fse) confirmed the reported touch screen failure, key pad test failed during (est) extended self test and an error referencing an air valve lift off failure when switching on the machine issue.During further investigation, the fse could not duplicate the keypad test failure.The manufacturer¿s field service engineer (fse) replaced the touch screen ( assembly touch frame) to address the reported problem of the touch screen failure, and error referencing an air valve lift off failure when switching on the machine.During further investigation, the fse could not duplicate the keypad test failure, so the keypad overlay was returned unused.The unit was checked overall, run in tested, cleaned and functionally tested and no abnormality was confirmed.
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