Other Operational Errors; Ddc Read Error; Back Light Malfunction - NEC MultiSync LCD2080UX -BKA Service Manual

4. Other Operational Errors

4.1 DDC Read Error

• Check the power supply for IC8A1/IC8F1.
• Check the clock signal waveform at IC8A1 Pin 1 and the data waveform at Pin 2.

4.2 Back Light Malfunction

• Check for the withdrawal of cables, if any.
• Is 18V available at CN2A1 Pins 10 to 13?
• Is 3.3V available at CN8A1 pin 4 ? Is there a waveform at CN2A1 pin 11?
• If there is still no lighting even though the above-mentioned voltages are maintained, then the inverter
PWB is considered to be out of order.
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