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Mac IIsi, no sound


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#1 reallyrandy

reallyrandy
  • 6502
  • LocationSouth Florida

Posted 17 July 2017 - 02:10 PM

Running 7.0.1.

 

I know I've read something about this before but I can't remember what I could even check. I think this is a common problem.

 

Anyone know anything about it?

 

Thanks,

Randy


FatMac 512k, Plus (2), SE/30, IIci (3), IIsi, LCII, iLamp (2), Flower Power imac, Indigo imac, PB5300c, PB5300, emate, MessagePad 120 & 130, QuickTake 100, 150 & 200, Floppy EMU, ipods (5), iphones (3)
Boxed software: Illustrator 1.0, '88, 3.0, PageMaker 1, 2, 3, 4.0, 4.2, FreeHand 2, Mac OS 8, 8.5 Silicon Beach SuperPaint 1.1, 2.0, Aldus SuperPaint, QuarkExpress 2, 3.3


#2 bibilit

bibilit
  • 68000
  • LocationParis area -FRANCE-

Posted 17 July 2017 - 02:12 PM

Caps maybe.....


Macintosh Classic and II ,CC, SE, SE/30,IIsi 25mhz(RasterOps video),Q 700,LC, LC III,LC475, PBook Wallstreet/Bronze/5300cs/1400c/100/Tibook Imac G3 slot-in, Bondi and G4 / PMac G4 sawtooth, QS, MDD, Yikes!, Cube, Imac Core 2 Duo, Ibook G3 (white/clam) G4 + Newton 120, eMate 300,Quicktake 150,  PowerCD


#3 bigmessowires

bigmessowires
  • 68000
  • LocationSan Francisco Bay Area, CA

Posted 17 July 2017 - 02:24 PM

That's a common symptom of failed capacitors on the logic board.



#4 reallyrandy

reallyrandy
  • 6502
  • LocationSouth Florida

Posted 17 July 2017 - 02:54 PM

I'll have to get it recapped probably.

FatMac 512k, Plus (2), SE/30, IIci (3), IIsi, LCII, iLamp (2), Flower Power imac, Indigo imac, PB5300c, PB5300, emate, MessagePad 120 & 130, QuickTake 100, 150 & 200, Floppy EMU, ipods (5), iphones (3)
Boxed software: Illustrator 1.0, '88, 3.0, PageMaker 1, 2, 3, 4.0, 4.2, FreeHand 2, Mac OS 8, 8.5 Silicon Beach SuperPaint 1.1, 2.0, Aldus SuperPaint, QuarkExpress 2, 3.3


#5 blitter

blitter
  • 6502

Posted 17 July 2017 - 06:37 PM

It's also possible that the connection from the speaker itself to the logic board might be faulty. My dad had a IIsi with an oxidized speaker connection-- this is a common problem with that model. If a sharp rap to the top of the case will occasionally restore sound, that might be the issue.



#6 tanuki65

tanuki65
  • 6502

Posted 18 July 2017 - 05:53 PM

I had a IIci, recapping gave it sound


--tanuki65

Macintosh PowerBook 1400cs/166 (floppy and 6x CD modules), Macintosh IIci, Macintosh SE FDHD, Apple IIe Enhanced, Unidisk 5.25", Apple Monochrome Monitor, Macintosh Colour Display, Asante EN/SC-10T.


#7 AlpineRaven

AlpineRaven
  • 6502
  • LocationMelbourne Australia

Posted 23 July 2017 - 11:07 AM

Failed caps - my IIsi is the same. I will re-cap it when I bite the bullet for it.
Cheers

AP



#8 Unknown_K

Unknown_K
  • 68LC040
  • LocationOhio/USA

Posted 23 July 2017 - 11:53 PM

Take a look at the board and see if the capacitors have leaked all over. Bad capacitors in the audio circuit will kill sound, some machines like the LCIII will whistle while they die (unit will not turn on again without a recap).


Favorites: big box Mac IIs, 950, 800's
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#9 AlpineRaven

AlpineRaven
  • 6502
  • LocationMelbourne Australia

Posted 29 July 2017 - 04:54 AM

no sound could be indication that the caps are gone as said above. My IIsi has that problem too.
Cheers

AP






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