I have a PAL Apple IIe, put in service in 1982. Components C9, C12, C15, and C17 on the 820-0073-B motherboard are burnt out. I originally thought they appear to be power diodes, but seem to be 10 µF electrolytic capacitors. I replaced all four and the computer boots properly now.
Starting up, however, the mainboard fails to detect the Z80 card, mouse card and the 64K extension card. The dual drive card in slot 6 works. Does anyone know the exact values of the capacitors? What else could be defective?