iMac PowerPC G4 very low sound • Sunflower Model

[nickgronk]

Just picked up an iMac powerpc for $1 at auction. changed pram. This is working. Problem, barely any sound. I have everything cranked up in software, reset nvram/pram - nada. I do get sound ONLY if I plug in a powered speakers in headphone port. I do not get the startup bong.
I get almost no sound with normal headphones. I mean, you can barely hear it. Took the board out and by eye found these 2 inductors broken. Not sure if they are for sound. Speaker is also plugged in and I tried a normal pc speaker in its place - still zilch. Are these inductors the culprit?
I cannot find any schematics for this board. I don't want to disturb anything.

Machine is working rather well otherwise. This is the Sunflower model , not the tower

[stj]

L12 lower left has been previously fucked with too.
but with apple stuff your first place to look is surface mount electrolytic caps
if theres a lot then start at the speaker jack and work your way back through the soundpath.
schematics will be online

[piernov]

Some iMac G4 schematics are available, find you logic board model number 820-**** and post your request in the desktop schematics request section if you cannot find it. The circuit you are looking at is indeed an audio amplifier, but the top of the inductors being slightly damaged like this is almost never a cause of concern, as long as the wire itself is intact. However it may mean the machine has seen rough days so you should check for any other physical damage (including inside the audio jack port).

[nickgronk]

I did find the schematics (posting it here in case someone happens upon this thread). Checked all inductors and all check good. 820-1257-A

L12 is factory. I checked other images of these boards, all look the same. Funny how Apple used a jumper wire from an inductor to a capacitor.

Checked the external speaker jack and it's clean. My first thought was to remove as it seems that is is blocking onboard sound. Same with headphone jack.

I'm stumped at this point. Will remove the STEWARD V201R-00 thing and see if I get internal sound. I believe that external is blocking somewhere,. somehow.