For additional reference, here is the capacitor list and dimensions for the M5140 (APS-20U) - North American version, which appears to be slightly different in its construction from the European version, and the cap at C151 has different ratings:
Replacement Part #
The part #'s are what I used for a few of these, all in stock at Digi-Key Canada.
Looks like my repair job on the analog board wasn't thorough enough. I'm still getting occasional screen dimming/flickering issues. Is there a picture that shows the most problematic solder points that should be inspected? I did the connector areas but there must be something else.
Turns out my friend has a spare keyboard and mouse that he's going to let me have. Given what everyone has said, I'll probably keep the SE out and keep the Plus as a spare.
My current spare is a Classic that even after recapping has an issue where the top right corner flickers and 'wobbles'. I think a bad battery may have caused some damage years before I got it. I should see if I can find a better board for it some day as the rest of the unit is good.