انصهار منصهر دائرة الإشعال

The ignition circuit's fuse blown, so the coils receive no power. Every cylinder on that feed loses spark together, which is the signature — a complete no-start rather than a misfire, with normal cranking and fuel pressure.

A fuse is a symptom. A shorted coil primary is the usual cause, along with a chafed supply in the loom that runs across the engine. Measure each coil's primary resistance to find the outlier before fitting a replacement, since a new fuse into a shorted coil blows immediately and repeated attempts damage the wiring the fuse protects. Check what else shares the fuse — an apparently unrelated fault on the same circuit is often the better clue to which component is dragging it down.