Apple does not repair iPads, but if the iPad is not eligible for warranty service will replace the entire iPad for a flat fee. If you have AppleCare+ on the iPad, the cost will be relatively minimal; $49 in the US. Otherwise, see the Service Pricing section here:
There are independent iPad repair services that may be able to perform a repair for less, depending on what's wrong with it. Do a web search for "ipad repair". You can also look for parts and instructions and do the repair yourself. Note, though, that if you elect to have the iPad serviced by an unauthorized shop or perform your own repair, you will get no further support from Apple.
This is the iPhone forum, by the way.