Follow the steps and fix it. God bless you The
power up test sequence has detected a key in the operated condition.
The power up test sequence
is performed every time the unit is turned on (powered up). This test
is performed because
a permanently stuck key will inhibit the correct operation of the
unit. Possible
Causes 1.
A key on the display housing is permanently stuck in the operated
condition. 2.
One of the upper PCA's keypad interface chips has failed. 3.
Liquid (perhaps perspiration) is present on the surface of a touch
sensitive display. Possible
Remedies 1.
Remove the keypad connector cable from the upper PCA. Restart the
power up sequence, if the
ERROR 5 is no longer present, the keypad is the cause. The keypad is
typically part of the
display housing. Replace the display housing to correct the problem. 2.
Remove the keypad connector cable from the upper PCA. Restart the
power up sequence, if the
ERROR 5 is still present, the upper PCA is the cause. Replace the
upper PCA to correct this
problem. Most upper PCA's are provided without software. Therefore,
the software (chip) must
be removed from the upper PCA being replaced and re-installed on the
replacement upper
PCA. 3.
Wipe the surface of the touch sensitive display clean of all liquid.
Restart
the power up sequence,
if the ERROR 5 is no longer present, the liquid was the cause.
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