Traynor Beta 800

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Another project and have a question regarding Traynor Beta 800.
The two amplifier boards top and bottom have 2 red leds .
Channel B 2leds on the bottom are on .
Channel A 2leds on the top are off.
Both channels are functioning so I have no idea whether they are suppose to be on or off. I have found that Channel A had both leds shorted so I replaced them with New red leds. There is 1.5 Dc V on the anode and cathode same as channel B that works but they are still not on.
Please any idea what to look for ?
I know Peter was working on one year ago and had some help...
Thanks

Paul.
 
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