LCD Upgrade Information A CRT can be unreliable and can be down for days at a time when you need it the most. When a CRT burns out, installing an LCD upgrade is the fastest and most reliable way to get a machine controller up and running. LCD upgrades are 100% compatible with old video connections such as BNCs, 20pin, 15 pin, 9 pin, 8 pin, VGA, CGA, 10 pin edge connectors, and many others.