crxr, can i ask you a questions? did you tell TS that there WILL be a risk when repairing this iphone beforehand?

well too bad. lady luck isnt by ur side now. even though you give all sort of explanation here but still the phone's touch screen is in working condition when it was in ur hand. and after you repair earpiece.. the touchscreen is malfunction. that is the fact. u know how "once broken consider sold" and "park at your own risk" works right?

"once broken consider sold" rule means no matter whether is it accidental or with intention, if you broke the stuff, you should pay for that broken stuff.

"park at your own risk" rule means the management will not responsible for any damage or incident happen to your car when you park at the parking lot.

since you didnt tell TS about the risk of repairing iphone, i think you are in "once broken consider sold" situation. you break, you pay. and i guess that is what most other people thinks too. just IF you told TS about the risk and if he agrees to it... well, he would have to bear the repair cost himself when this thing happens.