No need to open up your case and take pics of the motherboard (remeber, this is a laptop, Coco).
I'm not familiar with Conexant sound devices, but I'm sure you'll need to browse the audio options and look for a setting called "automatic headphone detection" or similar.
If you can't find the settings anywhere, you could try changing your drivers. HP have a driver section for your laptop here, but it doesn't have the latest Windows 7 drivers provided : http://h10025.www1.hp.com/ewfrf/wc/product?product=3252129&lc=en&cc=us&dlc=&lang=&cc=us
I don't know if you have 32 or 64 bit installed, but you may have success updating to the Vista drivers provided on that download page. They are labelled as "Conexant High Definition Audio Driver". I suspect these will be older than the ones you already have via Windows update, but it could correct the headphone detection issue.
I'm not familiar with Conexant sound devices, but I'm sure you'll need to browse the audio options and look for a setting called "automatic headphone detection" or similar.
If you can't find the settings anywhere, you could try changing your drivers. HP have a driver section for your laptop here, but it doesn't have the latest Windows 7 drivers provided : http://h10025.www1.hp.com/ewfrf/wc/product?product=3252129&lc=en&cc=us&dlc=&lang=&cc=us
I don't know if you have 32 or 64 bit installed, but you may have success updating to the Vista drivers provided on that download page. They are labelled as "Conexant High Definition Audio Driver". I suspect these will be older than the ones you already have via Windows update, but it could correct the headphone detection issue.