A LED / LCD TV Technician is someone who repairs, rebuilds or installs televisions with light emitting diodes and liquid crystal displays. They may also be called upon to troubleshoot issues related to these devices. A typical job for a technician would include repairing broken screens or replacing parts that have failed due to age or wear and tear. In addition, technicians are often responsible for calibrating the picture quality on TVs in order to ensure accurate colors displayed across all channels.