Many building codes now require the installation of a carbon monoxide alarm. With the increased regulation, the cost of installing a new replacement alarm is a better idea if your current one is failing. You can read more about this issue at http://www.cpsc.gov/cpscpub/pubs/466.html
you cant and its cheaper just to buy new ones to be honest
Most of the time it is cheaper to buy a new monitor.
This all depends on what exactly needs to be repaired on the forklift, if it's something minor, such as a spark plug, it would be much cheaper to repair. If something major is wrong, it would be easier, and cheaper, to just buy a used one due to the cost of parts, as well as the cost of labor.
It really depends on the type of LCD screen. If it's on a large, hdtv, it is definitely cheaper to repair. Smaller TV's or computer monitors would probably be cheaper to buy a new one.
Depends=would it be cheaper to buy a new one=or to fix it?
they can, but its cheaper just to buy a new one
You can take it to a repair shop, but it is probably cheaper to buy a new camera.
Personally, I have no idea what "smoke detector tape" is.
You can buy replacement products for electronic equipment at most repair shops but for something like a microphone it may cheaper to buy one online at Best Buy or ebay.
It depends on what is wrong with your fridge. If it's a small problem, it will be cheaper to call a repairman. It sounds like your fridge has a big problem, though, so I would probably just buy a new one.
You should buy them online from a trustful source. This would be a better idea because they are alot cheaper then they would be in a repair shop. If you have never shopped online, then a repair shop would probably be a better idea.
This really depends on where you are located and how much you are willing to spend on the repair. It might just be cheaper to buy a new tile cleaning machine. I'd call around to local repair shops and the manufacturer.