how to buy used laptop

If you want to buy used laptop you must check a few thing. The first thing that you must check is the lcd, good lcd laptop must have a clear display, if the lcd display not clear or bright it might had trouble with the light at the bottom of lcd. After checking the display, you must check the lcd for the death pixel. Death pixel is very small dots in lcd that cannot display the right color when the lcd viewing a picture. The next thing you check is the keyboard, press every button in keyboard and check if the button you press give a respon or not. After the keyboard you have to check the optical drive in laptop. For example if the laptop have DVD-Combo drive, put a DVD on it and check how long for the optical drive to display the content on that DVD. The longer time it needed to display the content showing the condition of the DVD-Combo optical laser reader is weak. If the DVD-Combo display the content in a few second it mean the optical laser reader is good.
After checking the optical drive you can check laptop mouse or touch pad. For IBM laptop you will find a small button in keyboard known as track point that you can use to move the pointer or have same function as mouse. Use it to move pointer in the screen and check for the respond. Other brand laptop have a touch pad with two or three buttons that have a same function with a mouse. Touch the touch pad and move your finger around to test the respond and accuracy to the pointer in the screen. Move the pointer in the screen over the icon in desktop, tap your finger once or two times to test touch pad for click or executing the icon command.The next thing you check is the laptop hard drive
, execute one program, the hear the sound that came from hard drive position. If it is quiet then the hard drive is in good condition, if it is not may be have a bad sector (not good). The thing you must check next is the battery. Usualy laptop battery stand for 1 hour using in good condition. Below 1 hour the laptop battery is not good or the battery sel is damaged so it can’t save the current power even it have been recharged. Laptop also have other features such as wifi or bluetooth to check it you must go to a hot spot that have a broad band internet access, and try to connect to the network. After checking the primary thing that must in good condition you can check laptop other features, eg . modem, network card, infra red.