I have exactly the same issue on my 3GS : no sound at all. It happened suddenly, after connecting the 3GS on an audio device with a dock for iPhone. Now: - No ring, no noise from keyboard, no voice during call, no music in iTunes, no sound from videos... and all this happens while listening from the internal speaker as well listening from the headphones. (it works with external bluetooth audio devices, however) - The volume bar still appears when I use the sound buttons on the left side of the iPhone. - The iPhone detects as expected the headphones when they are plugged in the jack port (I see this because the text is not the same on the volume notification when the headphones are plugged in). So, it's NOT because of a faulty jack. - Regarding the dock connector, after cleaning it (it did NOTHING), I bought a new spare connector and replace the original one with the new part : the sound problem is STILL exactly the same as before. So it's NOT from a faulty dock connector not a faulty internal speaker (that...

There has been 3 final revisions of the Amiga 1000. This one is Rev. B. Here are the details :

- Rev.6, fall 1985 : motherboard with 256 KB RAM, “mezzanine” dautherboard with 256 KB RAM, Denise 8362-R5 without EHB graphic modes, Agnus 8361 NTSC, black&white CVBS output, no Commodore logo, sold mainly in USA

- Rev.A, spring 1986 : motherboard with 256 KB RAM, “mezzanine” dautherboard with 256 KB RAM, “front” extension board with 256 KB RAM, Denise 8362-R6 with EHB graphic modes, Agnus 8361 NTSC or Agnus 8367 PAL, black&white CVBS output, no Commodore logo, sold in USA, imported in Europe and Australia

- Rev.B, summer 1986 : motherboard with 512 KB RAM, “front” extension board with 256 KB RAM, Denise 8362-R8 with 256/512 lines PAL graphic modes, Agnus 8367 PAL, color CVBS output, blue Commodore logo, sold in Europe, imported in Australia

All these revisions have the signatures.

The previous revisions (Rev1-5) were prototypes with chicken-lips-Commodore logo instead of A-logo on command keys.