AT&T PC 6300 - Page 436

MAINTENANCE
ERROR NO. PROBABLE CAUSE
MODULE
112 8041 Keyboard Controller
Failed
Motherboard
113 Oscillator Circuit Failed Motherboard
114 Speaker Circuit Failed
Motherboard
115 8087 NDP Failed
Motherboard
(See Note 2.)
116
Switches do not agree with
the installed hardware
(See Note 3.)
117 Keyboard I/O Register Failed
Motherboard
120 Nonmaskable Interrupt
Failed
Motherboard
Note 1: Verify that a cap is present on jumper C prior
to replacing the Motherboard.
Note 2; Verify that DIPSW-0, switch 5, is set to OFF (or "0")
prior to replacing the 8087 NDP.
Note 3; Refer to Appendix A and check the setting of switches DIPSW-0
and DIPSW-1.
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Figure 5-12. Motherboard Troubleshooting Chart
(Sheet 2 of 2)
5-58
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