Hello everyone today I get this microwave LG MS-0745V which turns on, the keyboard works fully, when placing time and giving star, the internal light turns on and the engine turns but does not heat the food. Check the condition of the magnetro (antenna status, continuity between terminals, it has no short of the antenna to the housing) and that's fine, the capacitor is not short. The lamina of the antenna chamber where the food is placed is made of plastic and is not damaged. What other tests can I do? I await your suggestions. Thank you

Measure if voltage reaches the PRIMARY of the high voltage transformer. Don't even think about measuring the secondary tension ... !!!! Also check the high voltage diode. Another problem could have a blown fuse between the transformer and the magnetron.

first measure if tension arrives at the primary of the transformer if everything is biern suspect the magnetron