I was given an HP flat screen Monitor yesterday with just the cord like this http://www.pcsrvc.com/usermanual/Image35.gif not THE exact PICTURE. Amongst the other items was a power cord AC/DC Apapter that I've ONLY seen used on laptops. MODEL ADPC1260AB S/N 1260AE60405370 My tower is HP & I did plug it in as is BUT NOTHING. My question is,is the cord I got the power cord? TIA.