I-TRIGUE 3200 repair help - right channel has a sneaky problem

[aprendiz007]

Hi all,
I got my hands on an old Creative I-TRIGUE 3200 (Model: MS0760A). It came with a problem on the right channel; no audio was coming out.
When putting it apart, I found that in fact there was audio coming out of the right channel. However, when I tilt it in a certain position, then the audio is gone.
Left channel works no matter what.
I'm sure there is a most likely some crack somewhere along the right RC jack connection, but I can't determine where. I've refilled solder in some of those nearby traces, but to no avail.
I, sent a request to creative about this product, but they said they got no support nor documentation for the product as it isn't sold anymore. (I knew it was a long shot)
I was wondering if anyone:

1. Run into this same problem and solved it?
2. Propose a way to solve this problem?
3. Has reverse engineered the schematics for this product's board and doesn't mind sharing it so that I can guide myself on the signal path.

So far, I've realized that, if measure voltage at the two inputs (2 pins enclosed in red @ inkedright_channel_out_LI.jpg) with the respect to V- terminal, I hear hum on the right channel when the speaker is connected. Not sure if it means anything to someone more experienced.
They are also biased at approximately 6.2V, which seems reasonable since the input voltage is ~12V.

Thanks in advance