Digital Equipment PRIORIS ZX 5000 MP, User Manual, Page: 149 / 169

Server Messages
B-2
POST Beep Codes
POST cannot display messages when an error occurs before the monitor
is initialized. Instead, it emits a beep code. The beep code is a series of
individual beeps, each equal in length. Write down any beep code for your
Digital service representative.
Beeps Error Message Conditions
1 Refresh failure Memory refresh circuitry on the
main logic board is faulty
2 Parity error can’t be reset Parity error in the first 64 KB
memory
3 Base 64 KB memory
failure Memory failure in first 64 KB
memory
4 Timer not operational Timer on main logic board not
operational or memory failure in first
64 KB memory
5 Processor failure CPU on main logic board generated
an error
6 8042 gate A20 failure BIOS cannot switch to protected
mode Keyboard controller might be
bad
7 Processor exception
interrupt error Processor exception interrupt error
8 Display memory read/write
error Video controller is missing or its
memory is faulty (not a fatal error)
9 ROM checksum error ROM checksum value does not
match encoded value in BIOS
10 CMOS shutdown register
read/write error Shutdown register for CMOS RAM
failed