Well, I re-racked the TCU. no difference.
Now took the top off it, looks great inside...
tried the toothbrush and rubbing alcohol on the side you can see, and tipped some down the inside too...
Next, I'll drink the rubbing alcohol if it doesn't work...
hmmm. Board looks Ok at a glance, but looking through a triplex loupe, there's clearly corrosion and deposits all over the place.
I'll let it dry and then put it together, but I think it's likely 'Donald Duck'd' A8 parts don't have a replacement.
Part number is 4D0 927 156 BN
OK put it back in, no joy. Now what do I do!?
Last edited by Simon Wallwork; 2nd August 2021 at 10:44 AM.
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