9. TROUBLESHOOTING
WARNING:
The system must be switched off before performing integrity checks
on fuses and components.
System F1 F3
110 – 240 V wall version 6.3 AT 250 V -
110 – 240 V stand version 6.3 AT 250 V 6.3 AT 250 V
• Symptom:
Display off when main switch is ON
• Action:
− check if the LED on the keyboard are ON and pressing the
keyboard buttons you can hear any beep.
If the keyboard doesn't work, switch OFF the equipment and verify:
− the flat cable connecting the CPU and the Driver board
− integrity of fuses F1 and F3 (if present)
− measure the presence of the main power supply.
If no anomalies are found, start replacing boards in the following
order: CPU, Driver board (including tubehead).
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