HP Integral Personal Computer Service Manual page 113

TMIe .... M .. U Trou ....... ootln • • 1Id R .... ir
Use the following procedure to troubleshoot and repair an MMU problem. In each of these steps,
always turn off the power before
you
connect or disconnect a cable or replace a component.
Step
1.
If one of the follOwing error messages ap-
pears, take the
indicated action.
***
ERROR - User portion
of MI'IU failed
***
ERROR - Supervisor portion
of the MMU failed
2. If
two
or more RAM ICs are identified as
bad (errors 120 through 135), an MMU
problem is probable.
I
Indlatecl Action
Repeat the test. H
an MMU failure
is indicated a
second time, replace the logic A PCA.
Repeat the test. H
an MMU failure
is
indicated a
second time, replace the logic A peA.
Replace the logic A PCA.