you seem to have a problem whit the ccd or in the flex or in the regulator section. Try this: disassembly your camera. You will see the optical block (lenses) and a flex that goes to the main board. That is the ccd , which "captures" the image. Pay special attencion th the connection to the main ,could be bad. if it´s ok then turn on in samera mode and put your finger over the ccd . You should see a video noise. If it´s that way , the ccd is broken. if you don´t see any noise , you must have a power problem. Have fun.