Editing PowerBook Duo 2300 (section)

=== Logic board ===
Apple's service board is 661-0153.<ref name="ss" /> It has FSTN (J6) and TFT (J7) display connectors, so it drives either the passive-matrix screen of an upgraded 210, 230 or 250 or the active-matrix screen of a 270c, 280, 280c or 2300c, and it has both SCSI and IDE hard drive connectors.<ref name="ss" /><ref name="ss200" /> On an upgraded 210, 230 or 250 a pliable heatsink has to be bent back to reach J6, and Apple says to flatten it again afterwards.<ref name="ss200" />

The board has seven or eight surface-mount electrolytics, depending on the source. Console5 lists C2 (47 µF 35 V), C3, C7, C8 and C9 (100 µF 35 V), C6 (100 µF 25 V), and C41 and C94 (33 µF 25 V).<ref name="c5">Console5 TechWiki, [https://wiki.console5.com/wiki/Macintosh_PowerBook_2300c "Macintosh PowerBook 2300c"] (retrieved 2026-10-02). Cap list: C2 47 µF 35 V; C3 100 µF 35 V; C6 100 µF 25 V; C7, C8, C9 100 µF 35 V; C41 33 µF 25 V; C94 33 µF 25 V. Secondary source.</ref> androda on 68kMLA also counted two 33 µF parts; MacDat lists one.<ref name="capthread">68kMLA forum thread [https://68kmla.org/bb/threads/pb-duo-2300c-and-270c-capacitor-list.38006/ "PB Duo 2300c and 270c Capacitor list"], androda, Challenger 1983, 3lectr1cPPC and others, January 2021 to July 2023. 2300c logic board: four 100 µF 35 V, one 100 µF 25 V, one 47 µF 35 V (Nichicon) and two cans marked 33 EHA, later confirmed as 33 µF 25 V. Community repair report.</ref><ref name="macdat">MacDat, [https://macdat.net/cap_reference/apple/powerbook/duo2300.html "PowerBook Duo 2300c Capacitor Reference"] (retrieved 2026-10-02). Logic board: four 100 µF 35 V, one 100 µF 25 V, one 47 µF 35 V, one 33 µF 25 V; no reference image. Secondary source.</ref> Count the 33 µF cans on the board in hand before ordering.