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XLS 2000 - No display

Hi,

I'm trying to repair this amplifier with the following problem:
Display shows nothing, just light up.
With display in place there are no error codes.
With display removed CH1 Thermal LED blinks 1x & CH2 Thermal LED blinks 2x.
According to the service manual (p5 & p82) the problem is 'LCD Communications Fail'.
Is the display faulty or is it the IC U706? (Microcontroller) ?
Problem here is to get these parts!

I appreciate any help you can give me.
Best regards.

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