This situation decreases time spent on current projects. During this warranty period, it is expected that the computer will need little or no service. If it does need service, the vendor will take care of the repair. As with an automobile, the older a computer gets, the more maintenance it needs. Poor quality parts also contribute to additional repair time.
Hard drives fail, motherboards fail, and parts wear out.
As a larger number of computers get old or if lesser quality machines were initially purchased, there is a higher drain on the technician's time to take care of routine lower level maintenance tasks. This does not allow the technician to spend as much time on higher level tasks such as network administration duties. Some districts handle this problem by outsourcing routine maintenance like that mentioned above. If not outsourced, older technology certainly adds to the technical support needed in the district. The use of donated computers creates its own set of support issues, particularly if machines need significant upgrading to work on the district's network.