Probable Cause
- A key is permanently depressed on the display.
- An interface chip (IC) has failed in the upper PCA's keypad.
- Liquid (cleaning solution or sweat) may be on the surface of a touch-sensitive display.
Corrective Action
- Disconnect the keypad cable from the upper PCA. Reset power to the machine. If Error 05 is eliminated, the keypad is the cause and should be replaced.
- Disconnect the keypad cable from the upper PCA. Reset power to the machine. If Error 05 still appears, the upper PCA* is the cause and should be replaced. *Upper PCA's most commonly do not come with software. Remove the software (chip) from the existing upper PCA prior to replacement and install it into the new upper PCA.
- Wipe away all liquid from the touch-sensitive display. Reset power to the unit. If Error 05 is eliminated, the liquid was the cause.
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