Mitsubishi Electric GOT2000 Series User Manual page 224

(4) Check of the screen display
Check
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(5) Check of buzzer sound
Check
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10 - 4
10.1 GOT Restoration Sheets
Symptom
The screen is completely
black.
The screen is completely
white.
A line is displayed on the
screen.
Other faulty displays
The screen freezes.
Symptom
No buzzer sound
Continues to beep randomly.
Continues to beep in a
particular pattern.
Beeps continuously.
Cause/status
The LCD or basic software may be faulty.
The GOT hardware may be faulty.
The GOT hardware may be faulty.
Example: A vertical line is displayed.
The screen display is not updated and any
operation is unavailable.
Cause/status
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• Buzzer sound:
Example: The rhythm repeats as three
beeps, one beep, and two beeps.
When the read device of the system
information was set, the device was turned
on and the Buzzer Output signal was input.
Corrective action
Perform the following in order.
1) Write the package data again.
2) Install the basic software again.
If the GOT is not restored by the above
operations, proceed to ■5. Faulty product
investigation.
Proceed to ■5. Faulty product investigation.
Proceed to (5).
Corrective action
Proceed to ■2. Status of the GOT when it
freezes (screen operation stopped).
Check the setting of the read device.
If the Buzzer Output signal has no error,
proceed to ■2. Status of the GOT when it
freezes (screen operation stopped).