94V-0 is a UL 94 flammability rating. It means the PCB substrate (almost always ) stops burning within 10 seconds after the flame is removed, with no flaming drips.

If you have the physical PCB and see these markings but no schematic, here is a step-by-step approach:

Контроллер синхронизации T-Con, MV-0S 94V-0 E88441