Editing IBM PC XT/370 (section)

== Common Faults ==

The XT/370 chassis is identical to the [[IBM PC XT (5160)]], so chassis faults are:

* '''RIFA mains-suppression capacitors''' in the PSU — vent and produce smoke / fish odour. Replace immediately as a preventive measure.
* '''Tantalum bypass cap shorts''' on the planar — pull the +5 V rail and prevent POST.
* '''Dallas DS1287 RTC battery''' on the planar (where fitted).

XT/370-specific faults:

* '''The three 370PC cards are effectively unobtainium.''' The modified 68000s, the modified 8087, and the dual-ported memory backplane are not reproducible by current technology. A surviving XT/370 with all three cards is a museum-grade machine.
* '''Card-to-card backplane connector''' between 370PC-P and 370PC-M can develop oxidation; cleaning restores function in most cases.
* '''VM/PC system diskette''' — the install diskettes are increasingly rare and the install procedure requires a working PC3277-EM card connected to a 3174 / 3274 controller, which is itself increasingly rare.