"How to clean the left and right buttons?"에 답변You can order similar switches here: http://www.digikey.ca/product-search/en?keywords=401-1742-ND If you call to place an order and pay by cheque, shipping is free. These switches are the better ones, and by buying from DigiKey you make sure they aren't Chinese knock offs that will fail again soon. I'm told they're also harder than the original ones, for a much more satisfying click feeling; and will not release the click until fully depressed as opposed to the original ones.
"No Power Gets Hot"에 답변I had this issue too, put my phone to charge for the night and in the morning, very hot and won't turn on. Tried replacing the battery (with another genuine one), let it sit for a few days with battery out, nothing worked. I sent it back to Samsung they replaced the whole device. Apparently it happens because the USB connector for charging is subpart and gets corroded over time. Preliminary signs are: leave the phone to charge without any CPU intensive apps running, phone gets warm to very warm (in some cases has to stop charging because too warm and safety kicks in). This will eventually wear the charging curcuit out and result in a dead unit again. Seems to happend after about 9-12 months. It is happening again to the unit they replaced, I ordered a USB flex (the whole PCB at the bottom with the USB port on it) to replace it and see if this fixed the heating during charging situation. Good luck