"How do I get my touchpad to work again?"에 답변there may be a foreign object obstructing the clicking mechanism open up the back panel and then remove the battery first. then you should be able to see if there is any debris in the touchpad.
"How do I repair my touch screen?"에 답변this is a hardware breakdown issue. I would say to bring it in to an expert.
"How can I get a foreign object out of the headphone jack?"에 답변Just replace the entire board. It is much easier than trying to coax the ball out.