Apple powermac server g3 minitow Service Manual

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 Hot Issues
Power-On Issue - 13
 
Power-On Issue 
 
If you experience a power-on issue with the Power 
Macintosh G3 Minitower or Macintosh Server G3 where the 
power supply fan is spinning, but there is no boot tone, no 
hard drive noise, no power LED, and no video, you may have 
an improperly installed or faulty voltage regulator. You 
should always reseat and/or replace the voltage regulator 
before replacing the logic board. (See “System” symptom/
cures in the Troubleshooting chapter.)