Compaq Professional Workstation AP200 Reference Manual page 145

Power-On Self Test Message
Message
301-Keyboard Error
303-Keyboard
Controller Error
304-Keyboard or
System Unit Error
402-Monochrome
Adapter Failure
404-Parallel Port
Address Conflict
Detected
501-Display Adapter
Failure
* L = Long, S = Short
Writer: M. Church Project: Compaq Professional Workstation AP200 Reference Guide Comments: 352620-003
File Name: L-APPE.DOC Last Saved On: 12/14/98 2:40 PM
COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED
Continued
Beeps* Probable Cause
None Keyboard failure
None I/O board keyboard controller
None Keyboard failure
1L, 2S Monochrome display controller
is defective.
2S Both external and internal ports
are assigned to parallel port X.
1L, 2S Video display controller
Compaq Professional Workstation AP200 Reference Guide
E-5
Recommended Action
Reconnect keyboard with
computer turned off.
1. Replace the
keyboard.
2. Replace the system
board.
1. Reconnect the
keyboard with
computer turned
off.
2. Replace the
keyboard.
3. Replace the system
board.
Replace the monochrome
display controller.
Run Computer Setup or
Windows NT utilities.
Replace the graphics
board.
Continued