You just want to jump in start soldering without knowing what the cause is???
Do you even KNOW the speaker is the reason? Sources and cables can be the reason.
As always, you should refer to the manual FIRST before coming here.That is where WE will usually start.
For example, there is no troubleshooting section but there is a website mentioned on the last page: www.ilive.net
...which leads to SUPPORT (and contact information, should this not help) which leads to
which leads to downloadable manuals
an instructional insert for changing the clock between 12/24 hr time and FAQs, which discuss your symptom.
"Why can I not hear any audio from my iLive docking system?
When an auxiliary line-in cord is inserted into the LINE-IN jack (on the right side of your IT188B) you will not be able to hear what is connected to IN2 (on the back of your IT188B). Both of these input share the same input function of AV2. To play audio from either of these inputs, press the FUNCTION button until AV2 appears on your LCD screen. If both inputs have connections with audio players, the LINE-IN jack will have precedence over the IN2 jack. Make sure to detach the cable connected to LINE-IN before connecting a device to IN2. You will need an auxiliary line-in cable (3.5 mm mini to stereo RCA cable) to connect an iPod shuffle to this system. Also, there is a Volume Limit option in the Settings menu of your iPod. Make sure that this maximum volume is set to a range that will be audible. Be careful when adjusting your volume level. Higher decibel levels at close range may put you at risk for hearing damage."