Cockpit display flicker drove me nuts on a 1990 Beechcraft in Tulsa last Tuesday

We had a King KX-155 and the screen was ghosting after 20 minutes of power, like a bad capacitor in an old TV. I reseated the backplane connector twice and reflowed a solder joint on the power supply board, thinking that was it. Then I noticed the dimmer knob was halfway cracked inside, so I swapped in a used one from the parts bin and it's been solid for three days now. Anyone else chase a simple knob issue for hours before realizing the obvious? It's funny how the old stuff always hides the easy fix.

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1 Comment

daniel_cooper3414m ago

Reseating connectors is always my first move too, but it's amazing how a cracked knob can mimic a dying power supply. I've had a similar ghosting issue traced to a dirty pot in the dimmer circuit, so I'd say you did the right thing swapping it out.

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