The way to buy right power supply adapter is to correctly match output Voltage(V), Amps(A) & most important the dc connector size/type. Exactly same model number power adapter can have different size dc connector. So always check the pin shape and size first or contact the seller for confirmation. AC power lead may not be included, so please ask the seller to include free if required, before or immediately after purchase.
Any question, please ask us before your purchase. Please send model number of your old adapter and/or input device if you do not have old faulty power adapter.
Finally always buy genuine quality branded adapters. Cheap replacement models or fake versions do not last very long and could be safety hazard too.