To repair a camcorder is cost prohibitive. Try to buy a used one in good condition and transfer all your tapes.
In order to transfer tapes, you will need a "Capture" device to capture and then you can edit unwanted sections, and then burn it on DVDs. I have done this by using an external capture device, Hauppauge HVR-1950. I chose the external device over an internal card because I want the capability to move this device from computer to computer. Here is the link: http://www.newegg.com/Product/Product.aspx?Item=N82E16815116029&Tpk=hvr%201950
You can also use this device to watch TV on your computer monitor.