so we had a pretty bad storm roll through a couple weeks ago and while i had everything unplugged from the wall i apparently forgot about the coax going to the antenna. nothing direct but there was a strike close enough to shake the windows. now the 7300 receives fine, waterfall looks normal, but when i key up there's literally zero power output. the ALC is doing something, it moves a little, but the power meter doesnt budge. tried it on a dummy load, tried two different mics, same deal. no magic smoke that i noticed, nothing obviously burnt when i look inside.

i'm comfortable with a soldering iron and i've replaced caps before on older gear but this is my first time poking around a modern SDR-based radio. anyone been through something like this or have a clue which direction to start chasing? i dont have a full Icom service manual yet, trying to track one down.

had almost the exact same situation with a neighbors 7300 last spring. first thing i checked was the PA transistors on the final board — on his it was one of the RD100HHF1s that took the hit. you can probe across the drain-source on each one with the radio off and if you get a dead short on any of them thats almost certainly your culprit. also worth checking the low pass filter board because the switching relays on there can get cooked and sometimes they just weld contacts in a weird position that kills output without leaving any visible damage. get the service manual from the usual places, not hard to find if you know where to look, and trace through the TX path systematically. dont just start swapping parts blind or youll waste money.

yeah the finals are the obvious guess but i'd check something simpler first — the ALC line. if there's a fault condition the radio can actually suppress its own output down to nothing as a protection thing. worth seeing if there's anything weird in the menu diagnostics before you crack it open. also fwiw i've seen the antenna tuner relay on these cause weird TX issues after a surge even when it looks like the tuner is bypassed. just a thought, might save you some time before digging into the PA section.