When I adjust volume levels on my 3GS, it does not say "(headphones)" when no headphones were plugged in. It says "(ringer)". I tried cleaning the jack as you did, haeckmac, but no change. The speakers are still dead. And yes, these speakers are newly removed and replaced, but they still do not work. Thank you for the post/info. I'm glad you got yours back. I am still waiting for my new headphone jack assembly to arrive. Will report back when installed. I'm not as hopeful after reading your experience, however.

We're in the same boat, Blake. I bought a new headphone jack assembly ($12) on eBay. When it arrives and I install it, I'll report back. I expect this will be my "dead end".

I just thought of something. When the headphones are plugged into the jack, the speakers are disabled. If there is a short somewhere in that jack... well that could disable the speakers. I'll try to remove and replace my headphone jack with another unit and will see if that has any effect. Fingers are crossed! JK

I have a nearly identical problem with my 3GS. I also had water damage. I also replaced the LCD and the dock port (with integrated speakers). Everything is back, except the speakers. As a side note, I can live without playing music/video on the speakers. However, I cannot deal with a phone that doesn't ring. I am grateful to have the vibrate function working. I'm not sure if the original problem description mentions this but on my unit, ALL sound is operable via the headphones. So, since the sound is being processed and the speakers are new, I have to assume that the problem lies somewhere between the sound processor and the speakers themselves. It could be a connection. That will just take some cleaning to determine. But I think it must be something to do with the amplification of the signal. Can anyone identify the circuitry and components of the iPhone between the signal processor and the speakers? I suspect the amplifier is fried, but I just don't know where to start if I want to replace that. Thanks in a...