We report a novel method to test and estimate collimation and beam alignment using a liquid-crystal TV (LCTV). In this technique, a lenslet array pattern generated using a computer program is `written' (transferred) as a video signal to the LCTV using an image-processing system. The image formed by this array at a suitable distance is grabbed using a CCD camera and processed using a centroid-finding algorithm. Experimentally, deviations from collimation and beam alignment as small as 10 micrometers have been detected. Using a LCTV, it is possible to obtain near-perfect collimation and beam alignment. This technique will be used to achieve initial system collimation and/or alignment and as an aid in automating optical systems that are required to maintain constant collimation and beam alignment.