Some times it works .Doing your own repairs is not advisable and you'd do so at your own risk.
Doing your own repairs is not advisable? I could not disagree more. More people need to DIY repairs, instead of paying an arm and leg to get the repair done by Apple or a third party cell phone store.
Did you know that in 2010, 3.5 million tons of used or dead electronics were thrown out? That's a lot of electronics by any standard. I am a firm believer that if you know your device inside and out, and are educated about your device, then you are a true owner of that device.
Repair something that you own that is either broken or dead, and see how much pride you have when you are done