User`s manual

T-4
Troubleshooting CPU Boards: Solving Startup Problems
T
IV. Debug
prompt
147-Bug>
appears at
powerup, but the
board does not
auto boot.
A. The initial
debugger
environment
parameters may
be set wrong.
1. Type in
env;d <CR>
This sets up the default parameters for the debugger
environment.
2. When prompted to Update Non-Volatile RAM, type in
y <CR>
3. When prompted for clock speed (in MHz), change it
only if it is not correct.
4. When prompted to Reset System, type in
y <CR>
After a cold start, the debug prompt
147-Bug>
is displayed.
5. Change to the diagnostic directory by typing
sd <CR>
Now the prompt should be
147-Diag>
6. Run selftest by typing in
st <CR>
The tests take as much as 10 minutes, depending on
RAM size. They are complete when the prompt
returns. (The onboard selftest is a valuable tool in
isolating defects.)
7. The system may indicate that it has passed all the
selftests. Or, it may indicate a test that failed. If neither
happens, enter
de <CR>
Any errors should now be displayed. If there are any
errors, go to step VI. If there are no errors, go to step V.
B. There may be
some fault in the
board hardware.
Table T-2. Troubleshooting MVME147 Series Boards Only (Continued)
Condition Possible Problem Try This: