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== Common Faults == The /GX inherits all of the chassis-level faults of the [[IBM 3270 PC]] (RIFA mains-suppression caps; tantalum bypass shorts; ageing 130 W IBM XT PSU). /GX-specific faults are dominated by the rarity of the 5378 / 5379 pair: * '''IBM 5378 Display Attachment Unit''' โ '''the rarest single component in the PC/GX system.''' Built specifically for high-resolution vector graphics; not interchangeable with the /G's 5278. * '''IBM 5379 19" CRT''' โ '''premium 19" tubes are scarce''' and command high prices when available. A failed 5379 effectively retires the PC/GX from operation unless a donor 5379 can be sourced. * '''75-pin cable''' between 5378 and 5379 โ proprietary IBM; verify pinout against GA33-3141-0 if you must replace it. * '''GCP system diskettes''' โ image immediately if you have an original set.
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