TroubleshootingSymptom Charts/System - 3

System

System

1

Verify that system software is version 7.1.2 or later

intermittently

 

(6100/60 & 6150) or 7.5 or later (6100/66 &

crashes or hangs

2

6150/66).

 

Verify SIMMs are noncomposite and installed in like pairs

 

3

(same size/speed).

 

Verify that software is known-good.

 

4

Verify that software is Power Macintosh compatible (contact

 

5

developer).

 

Clear parameter RAM. Hold down <Command> <Option> <P>

 

 

<R> during startup but before “Welcome to Macintosh”

 

6

appears.

 

Replace cache SIMM (if installed).

 

7

Replace DRAM SIMMs. Refer to Memory manual.

 

8

Replace logic board. Retain SIMMs.

 

9

Replace power supply.

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Apple WS 6150 manual System