Sound ONLY in right channel from minijack

Hi
I have a 1.5 GHz 15 inch aluminum powerbook g4, exactly one year old, in perfect working order.
For quite some time now, I've noticed the audio in my bose media mate speakers (1.0) from the left channel has been a bit crackly at times. I thought it was the speaker...I would jiggle the connection and that appeared to do the trick.
The other day, the left channel completely went out. Being the handy man I am, I decided to cut the wire to the left channel speaker and try replacing the connector (as I thought this was the issue). It was, of course, not.
Then, today I went to plug in headphones, and noticed the same thing. NO AUDIO from left channel.
Please note, however, that there appears to be stereo sound coming out of the powerbook's internal speakers.
I have been through sys prefs> sound, and utilities > audio/midi setup, messed around with all the settings....no use. I have the current version 10.4.7 software.
If ANYONE has an thoughts/input/solutions, it is always greatly appreciated.
Thanks,
Bret
G5 Dual Core 2.3GHz, MDD dual 867mhz G4; 15 Alum PB G4, 1.5GHz   Mac OS X (10.4.7)   2.5 GB; 1.75 GB; 1 GB RAM, respectively

Internal speakers: OK
External speakers: Not OK. no sound out of left channel
Sounds like your minijack is shot, either the jack itself (unlikely) or the jack's connection to the computer.
Unless you very handy and comfortableopening up your computer, you may want to take it in and have it repaired.

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