
EPC-7 Hardware Reference
9
9
Symptoms
Possible
cause(s)
Solution
System fails at power-up -
will not run power-on self-
test.
The system is not getting
power.
Hardware failure.
Check the backplane and verify that
+5V power is good. Verify that the
EPC-7 is fully seated in the chassis.
This cannot be diagnosed in the
field. Call RadiSys Technical
Support.
Serial port(s) do not work.
Bad power.
Interrupt conflicts
Port hardware failure.
Verify that bac12V and
-12V are good.
An EXM module is using the same
interrupts as COM1 and/or COM2.
Verify that no other card in the
EPC-7 subsystem is using IRQ3 or
IRQ4.
Call RadiSys Technical Support.
System hangs during boot
process (Master LED on;
RUN LED off)
Chassis has no Slot-0
controller providing bus
timeout.
You are probably loading an
expanded memory manager (for
example, EMM386.EXE) in your
CONFIG.SYS file. This can cause
the system to hang if
- there is no Slot-0 controller
- the Slot-0 controller is not
providing the proper bus timeout
- the Bus Grant jumpers are not
installed.
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