Beep Codes; Disassembly And Reassembly - NEC VERSA S Service Manual

5-8 Troubleshooting and Repair

Beep Codes

When the system detects an error and cannot display an error message because of the hard-
ware fault, the system indicates the error by beeping.
One beep indicates that the computer has completed its power-on self-test. If intermittent
beeping occurs, power off the computer and try again. If the beeping persists, see Table
Section 5-4 for a description of the beep codes.
Beep Sequence
S-S-S-P-S-S-L-P
S-S-S-P-S-L-S-P
S-S-S-P-S-L-L-P
S-S-S-P-L-S-S-P
S-S-S-P-L-S-L-P
S-S-S-P-L-L-L-P
S-S-S-P-L-L-L-P
S-S-L-P-S-S-S-P
S-S-L-P-S-S-L-P
Note: S = Short beep
P = Pause
L = Long beep

DISASSEMBLY AND REASSEMBLY

This subsection contains step-by-step disassembly procedures for the system. Reassembly is
the reverse of disassembly. Each procedure is supported by a simplified disassembly illus-
tration to facilitate removal.
Disassembly consists of removing the following components:
Sequence
1
2
3
4
Table Section 5-4 Beep Codes
Description
DMA page register failure
Refresh failure
ROM checksum failure
CMOS RAM failure
DMA controller failure
interrupt controller failure
80C51SL (8042) keyboard controller failure
Video adapter failure
RAM failure (no message is displayed)
Table Section 5-5 Disassembly
Part
Battery pack
Keyboard
Memory module
Hard disk
See Page
5-9
5-10
5-13
5-14