For a deadline of 3 days I think what you have right now is a pretty good deal. Best not to mess it up worse trying to fix it.
What happens after you take a photo that doesn't let you take another one?
It appears the CLICK contact is getting jammed after the push. if possible you can try to replace the specific part, unless it is a touch switch.However it is risky to DIY repairs to cameras. You need proper tools and good experience,lest you may cause further damages unknowingly.I have a panasonic DMC-FZ5. I can turn it on, and snap one picture. Thats it. If I want to take another picture, I need to turn it off, then on again. No buttons or zoom works.
I NEED this camera in 3 days! Is there anything I can do myself? Please help!