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Slothie · 28th Apr 2020, 10:02 pm

John, I can't recall if you have replaced or tested the power supply electrolytics and any on the board? Poor smoothing can cause all kinds of intermittent and temperature related problems.

28th Apr 2020, 10:02 pm	#285
Slothie Octode Join Date: Apr 2018 Location: Newbury, Berkshire, UK. Posts: 1,287	Re: Zx81 John, I can't recall if you have replaced or tested the power supply electrolytics and any on the board? Poor smoothing can cause all kinds of intermittent and temperature related problems.