2 yr old ipad wont charge

If you are experiencing difficulties with reliable charging, you may have a problem with the Power Adapter, the charging cable, or the iPad itself. 

You should note that the Power Adapter must be rated at 10-12W minimum to charge an iPad; a 5W iPhone Power Adapter is inadequate.

These support pages should help with troubleshooting the problem:

Charge and monitor the iPad battery - Apple Support

If your iPad won't charge – Apple Support

If you are unable to identify the source of the problem, you would be well advised to take your iPad, Power Adapter and cables along to the Genius Bar at your local Apple Store - where the technicians will be able to test and assess your kit.

Genius Bar Reservation and Apple Support Options - Apple

Do you have any other know good Apple power charging cables and power/charging adapter blocks you can test with to confirm if it is your iPad or the currently used cables and/or power/charging blocks that may have failed?