3 Year On Site Repair (Total 4 Years) for Lexmark C544 Printers. With On Site Repair, a Lexmark-authorised specialist comes to your home or office to analyse and repair your defective device directly onsite. The specialist will also make sure your product meets Lexmark's most stringent standards for quality and performance. This offering includes telephone and Web-based support, all parts and labour complete onsite repair and testing. Response times is usually next business day in serviced areas and can be adapted to your specific requests, and may vary depending on the type of product. Next Business day Response time High qualified service action.