I'm not too tech proficient, but I'm getting better, and decided to tackle my biggest challenge so far. I took everything out of a Gateway PC, replaced the PSU and put everything back into a new full tower case. Everything works great except the audio. Here is the problem and details: I only have an onboard audio card. The new case has a headphone jack on the front that connects to the "audio" pin connection on the bottom of the motherboard. I connected this. After reassembling, the audio jack on the rear of the case on the motherboard I/O panel does not produce sound. HOWEVER, the headphone jack on the front DOES produce sound. I'm a little puzzled because that would seem to imply the motherboard is fine. Does the I/0 panel audio ports run off of dedicated power, or a specific power cord that I might have placed in the wrong place or backwards? Any other ideas? Followup question. THere is something wrong with the front headphone jack (maybe a manufacturer defect) that is causing the left speaker to crackle and be less loud. almost like a bad speaker, but I tested for that. In the case I took everything out of there was a single AUDIO pin connection from the front panel to the motherboard. But on the new case the AUDIO pin connection had an additional identically sized pin connection coming off of it about 1" from the AUDIO pin connection. It had some numbers on it like a voltage rating or something (unsure).. I just left it hang loose. Any help would be greatly appreciated. MORE INFO: Opened realtek HD Audio manager program When I plug the jack into the back I/O panel the corresponding area on the diagram does light up and recognize. However no sound is produced when testing.