User manual

Message Possible cause Remedy
Memory write/read failure at
hex-value,readhex-value,
expecting hex-value
Failure of one of the memory
chips
Replace the memory chip
No boot sector on hard disk -
strike 7 to reboot
Drive C unformatted or not
bootable
Format the drive
Not a boot diskette -
strike 7 to retry boot
Diskette in drive A
unformatted or start not
possible
Replace diskette and reboot
No timer tick interrupt Timer chip failure Check timer chip on CPU
Hex-value optional
ROM bad checksum =
hex - value
Peripheral card has defective
ROM
Replace the card
Shutdown failure Failure of the keyboard
controller or logical circuit
connecting it
Check the keyboard controller
Time-of-day not set -
Please run SETUP program
Timer not set Start SETUP
Timer chip counter 2 failed Chip failure Replace the timer chip
Unexpected interrupt in
protected mode
The non-maskable interrupt
(NMI) cannot be deactivated
Check the CPU, especially
the logical circuit of the
interrupt
Unexpected type 02
I/O card parity or memory
parity interrupt at xxxx:yyyy
Type (S)hut off NMI,
(R)eboot; other keys to
continue
Error writing to the system
memory or using the I/O
registers
Replace the memory chip
Internal cache test failed Error in CPU Replace the CPU
Error messages
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