… The IIci uses DRAM for video and maps it to Bank A. Contrary to other Macintosh models, always install the lowest density SIMMs in Bank A for best performance.

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As Charlieman suggested, 80ns RAM is needed. If you have no video card in place, onboard video needs Bank A (two right-hand pairs) DRAM to work (so-called 'Vampire Video'). Your total DRAM, depending on your installed System, may then be perilously low. (The IIci can support up to OS 7.6.1 on a 68030 if it has enough RAM, which can be up to 128MB.)

… On-board video support for 12” B&W, 13” RGB, and 15” B&W Portrait monitors …

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Various third-party and Apple NuBus video cards can give a wider choice of displays, and also obviate the use of DRAM for video with their on-card VRAM.

When they stripped the IIci maybe they took the ROM jumper at W1. Without it you won't get any video.

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Nor anything else, for that matter. That jumper selects between on-board ROM and the ROM slot. There never was a ROM card for the IIci, so the on-board ROM must be selected. Otherwise the IIci behaves all-same hearthstone. No ROM = no startee. Nix. Nada.

… Parity is generated by the optional Parity Generator Chip (PGC). If you want parity checking you must order the Macintosh IIci configured with the PGC and nine-bit DRAM SIMMs.

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The (scarce) parity-checking version of the MLB obliges you to use (9-chip) parity SIMMs (but still 80ns or faster). If there is no Parity Generator Chip to the left of the DRAM slots of Bank B, but only the naked solder-pads, this is not a concern. You can use parity SIMMs in a IIci without a PGC, however, because the ninth chip will be ignored by the System. If you do not have a video card, you could probably use the 4 x 1MB in Bank A and the 4 x 2MB in Bank B (you are fortunate that the IIci is one of the few Macs that will use 512kB and 2MB SIMMs, but not 8MB) to get around Vampire Video effects.

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