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RE: schematics

Posted by fredtr on October 2, 2020 at 17:37:51:
You mentioned initial LED problem, I would first check the PS voltages. It is a separate LED supply which comes from the digital 5 volt supply. All you need to do it is a voltmeter. The supplies are separate enough that it is probably a low voltage only problem. If you want to give it a try, take the cover off and take pictures and post them.

If you want a guess, it would be bad filter cap in the digital 5 volt supply. My guesses are usually wrong, but so many times, problems are immediately visible by just taking off the covers. Look for a bulging capacitor in the PS section, particularly ones that show on them voltage ratings less than 100 volts.