if the headphone jack works fine, then you need to check the op-amp and transistor pair next to the sony chips. That drives the speaker.
Also keep in mind the speaker amplifier gets its signal from a reed finger in the headphone jack, so if the jack is corroded slightly, the speaker may or may not work or intermittently.
Also keep in mind the speaker amplifier gets its signal from a reed finger in the headphone jack, so if the jack is corroded slightly, the speaker may or may not work or intermittently.
