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This page will cover flat screen TVs and computr monitors.

Summary

Safety

As with all mains electrical devices, dangerous voltages may be exposed when opened even if the mains lead is disconnected from the wall socket. Be aware that capacitors store electricity and that the voltage across the terminals may be 100's of volts.

Main section

There are several types of flat screen (flat panel) TV's and monitors. A good starting explanation can be found here: https://en.wikipedia.org/wiki/Flat-panel_display

For completeness we should mention the original CRT (cathode ray tube) screens which were the norm from the first days of television to around the 1980's when plasma and newer technologies started to replace bulky CRTs. CRTs also required very high voltages 10-20KV (10000-20000Volts) which meant repairing required great care.