Troubleshooting - DEC Digital Alpha VME 4/224 User Manual

Table 2–13 Troubleshooting
Symptom
No LEDs lit, no console prompts.
Green LED on, blank dot matrix display,
and no console prompts
Green LED on, dot matrix displays the
number 5 on power-up.
Green LED on, dot matrix displays the
number 0 on power-up.
Green LED on, dot matrix displays a
flashing letter A on power-up.
Green LED on, dot matrix displays a
flashing letter D on power-up.
Green LED on, dot matrix displays a
flashing letter F on power-up.
Green LED on, dot matrix displays a
flashing letter G on power-up.
Green LED on, dot matrix displays a
flashing letter I on power-up.
Diagnostics pass but the SCSI tests take
an inordinate amount of time (greater
than 10 seconds).
Diagnostics pass but there are no (or
unreadable) characters displayed on the
console.
Corrective Action
Check power. If 5 V power is out of
specification, the module will be held in reset.
Check the seating of SROM (8-pin socketed
device near PCI port). See Figure 2–2.
Check the seating of the memory modules.
Ensure that the console terminal is not in
''hold screen'' mode.
Check the SCSI termination, the seating of
the Digital Alpha VME 4 module, the seating
of the breakout module, the seating of the
SCSI cable, and the seating of other SCSI
devices.
Check that the TOY/NVRAM device is seated
properly (see Figure 2–3).
Check the seating of the Network Address
ROM (see Figure 2–3).
Check the seating of the twisted pair cable
and the nearest network transceiver.
Check the seating of the Digital Alpha VME
4 module, the seating of the breakout module,
and the seating of other VME devices.
Check the SCSI termination, the seating of
the Digital Alpha VME 4 module, the seating
of the breakout module, the seating of the
SCSI cable, and the seating of other SCSI
devices.
Check the console terminal connections, and
settings (9600 baud, 8-bits, no parity). The
terminal should be plugged into the (CON)
port.
Installation Procedures 2–31