Afroman goes over some basic information about capacitors: Capacitance, voltage ratings and polarity. Once you know what you are doing, you can replace faulty caps...
Skip Intro 0:35 LCD/AMOLED Removal 2:58* (fishing line & heat can help, see note below) Digitizer Replacement 5:27 Reassembly 7:28 To replace a broken LCD...
www.directfix.com presents the Apple iPhone 4 teardown and screen replacement directions. This will give you step by step free video directions on replacing a screen...