Andrei Ionut Dobre, [https://www.youtube.com/watch?v=STc5BlRSK5o|here is] a decent video on how to dismantle your Acer. [http://www.insidemylaptop.com/disassemble-acer-aspire-5251-5551g-5551-series-laptop/|These instructions] might also come in handy. The jack is soldered to the motherboard, so it will require a bit of work and skill to remove and replace it. As for where to get the replacement, this will depend on where you are located. Check on places [http://www.aliexpress.com/wholesale?SearchText=acer+headphone+jack&initiative_id=QRW_20130430071439&productId=821931533|like this.] Hope this helps, good luck.