NEC VERSA 6220 Service Manual page 82

3-6 Troubleshooting
Number of Beeps
1
2
3
4
5
6
7
8
9
10
11
Table 3-3 Beep Codes
Error
Refresh Failure
Parity Error
Base 64 KB Memory
Failure
Timer Not Operational
Processor Error
Gate A20 Failure
Processor Exception
Interrupt Error
Display Memory
Read/Write Error
ROM Checksum Error
CMOS Shutdown
Register Read/Write
Error
Cache Error/External
Cache Bad
Description
The memory refresh circuitry on the
motherboard is faulty.
Parity error in the first 64 KB of memory.
Memory failure in the first 64 KB.
Memory failure in the first 64 KB of memory
or Timer 1 on the motherboard is not
functioning.
The CPU on the motherboard generated an
error.
The keyboard controller may be bad. The
BIOS cannot switch to protected mode.
The CPU generated an exception interrupt.
The system video adapter is either missing
or its memory is faulty. (This is not a fatal
error.)
The ROM checksum value does not match
the value encoded in the BIOS.
The shutdown register for CMOS RAM
failed.
The external cache is faulty.