Power-On Self-Test Error Messages, Diagnostics

5-3

Table 5-1. Power-On Self-Test Error Messages Continued

Message	Beeps	Probable Cause	Recommended Action
402–Monochrome	1L1, 2S2	Monochrome display	Replace the monochrome display con-
Adapter Failure		controller board	troller board.
501–Display Adapter	1L1, 2S2	Video display controller	Replace the video board.
Failure		board
601–Diskette Controller	None	Multipurpose fixed disk	Replace the multipurpose fixed disk
Error		drive controller board	drive controller board.
605–Diskette Drive		Mismatch in drive type	Run Setup.
Type Error
702–Coprocessor	None	Coprocessor or switch	1. Check the switch settings.
Detection Error		setting problem	2. Replace the coprocessor.
1780–Disk 0 Failure	None	Fixed disk drive/format error	Run ADVANCED DIAGNOSTICS.

1781–Disk 1 Failure	None	Fixed disk drive/format error	Run ADVANCED DIAGNOSTICS.
1782–Disk Controller	None	Fixed disk drive controller	Run ADVANCED DIAGNOSTICS.
Failure		error
1790–Disk 0 Error	None	Fixed disk drive recalibration	Run SETUP and ADVANCED
		or wrong drive type	DIAGNOSTICS.
1791–Disk 1 Error	None	Fixed disk drive recalibration	Run SETUP and ADVANCED
		or wrong drive type	DIAGNOSTICS.
Parity Check 2 XX000Y ZZ	None	Parity RAM failure	Run ADVANCED DIAGNOSTICS.
Audible	1S2	Power-on successful	None.

Audible	2S2	Power-on successful	None.

(RESUME = “F1” KEY)	None	As indicated	Press F1 key to continue.
1L = Long
2S = Short