FAQ: If a certificate signing request was generated on server A (now defective) and i want to install the certificate on Server B (replacement), can this be done?

Moving certificates from one server to another is definitely possible. There are multiple criteria involved in determining how to move the certificate from one server to another. Please see the below articles to determine the proper way to move your certificate from one server to another:

How To: Moving an SSL certificate from one Microsoft server to another Microsoft server

How To: Moving an SSL certificate from a Microsoft server to a Linux server

How To: Moving an SSL certificate from a Linux server to another Linux server