The Macintosh II has a couple of revisions. The earlier version uses axial electrolytic capacitors, whereas the later version (shown here) uses quite a few surface mount electrolytic capacitors instead. In addition to the issues with leaky capacitors, this version is also prone to battery leakage. The batteries were soldered directly to the motherboard, so I replaced these with battery holders, to allow easier battery changing in the future. It’s also worth mentioning that when the batteries go flat, they stop the computer from booting, and therefore need to be replaced.
The small, yellow 10µf 16V axial capacitor has pads underneath it for the option of using a surface mount capacitor instead, which is what I did.