The laser assembly is most likely damaged. It is not cost effective to repair it, the whole unit needs to be replaced.
Use another phone until yours is repaired or working again.
Get it diagnosed and repaired.
Take it to be repaired or buy a new one
It can be repaired no matter what you do or replaced, not sure of intent of your question
yes it can be repaired or u can get a complete refund on it and get Ur money back if it hasn't been 99 days at wallmart
When Batteries are removed.
depends on what you're talking about
2weeks
You can open the windows in your house and use fans. Or you can have you air repaired.
It probably not working right. You should get it repaired or replaced.
Working on the SRS can be very hazardous. For this reason I suggest you have this repaired by a professional.
iPhone 4 Mic's are typically damaged from moisture or liquid damage. This can be repaired.