Odd that D13 would now be off.? We'll assume the 68230 and related circuitry is ok for the moment.
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Along the same lines as what Yves suggested, you could also try resetting the CRT to DEFAULT SYNC.? Flying blind, it would be:
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? CONFIG
? Softkey #6 (MORE)
? Softkey #6 (MORE)
? Softkey #3 (DEFAULT SYNC)
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You could also try setting DEFAULT CONFIG:
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? CONFIG
? Softkey #6 (MORE)
? Softkey #4 (DEFAULT CONFIG)
? Softkey #4 (DEFAULT CONFIG)? (second press needed to confirm)
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Another thought is to try resetting the contents of the SRAM completely by grounding the + side of the supercap through a 10 ohm resistor to ground and hold it there for about 10 seconds (obviously with the power off). ?You'll then have to go through the initialization procedure on page 204. ?I know you were trying to avoid doing that in the first place, but it seems the most likely explanation is that something got corrupted in the SRAM during the battery replacement procedure.
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-mark
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On Fri, Apr 4, 2025 at 10:37 AM, KB2LMN wrote:
Mark I took the boards back out and cleaned all the contacts good and seeded them in and out a few times now the lite D13 is off. I do still have the screen issue shown in the video. I also tried what Yves suggested with no luck.
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Andrew
