Hi guys, my Dell Inspiron 3580 recently decided it wasn't going to turn on anymore. When plugged in there are no lights and nothing happens when I press the power button. The AC adaptor seems to be working as the light comes on and it charged my sister's laptop. I have disassembled the laptop and tried unplugging the battery to run directly off ac power but nothing worked. I have found the DC jack which I think could be the issue, however, I can't find any available locally (in South Africa) and it is a bit pricey to ship on in from ebay or somewhere. I want to know how I can test this jack to confirm it is faulty before spending money on a new one when something else could be the issue. I don't have a multimeter right now but I will try and borrow one later today. Thanks in advance.