Приветствую. Проблема - отключается при любой попытке воспроизведения звука, потребление от бп 100-200 мА после отключения. Кодек ALC711 и два усилителя на динамики - ALC1309D. Откидываю дросселя по питанию усилителей - наушники работают все нормально, по HDMI звук тоже без проблем. Пробовал по отдельности все равно отключение. Попробовал включить без подключения динамиков - не вырубается, подключаю динамик - попытка воспроизведения, щелчок в динамике и отключение платы. Динамики все по 4ом короткого нет. Могут сразу два усилителя так выйти из строя? Драйвера родные система, чистая. Пересобирал биос с чистым ME и Bios region - без изменений.

I imagine it's the high power side that is being shorted to ground somehow. I would try checking resistance to ground on each of the output channels and GVDD_OUT to get an idea of the health of the internal gate driver and switching circuitry. Otherwise, as long as both speakers are still reading healthy at 4 ohms and you tried them separately, I'm not sure what explanation there is other than faulty amplifiers. Though, if I'm understanding you correctly, maybe you actually already tried isolating PVDD but it still shut off?

Maybe the attached example of a block diagram for the TPA3126D2 could be helpful for coming up with further troubleshooting, since the internals of the ALC1309D should be quite similar, at least on the high power side.

Зная не понаслышке))) класс D - вполне возможно!

ALC1309D оба поменял с донора - поведение не изменилось

To confirm: You said you already tried removing the chokes at L2805, L2806, L2815, and L2816 to isolate PVDD on both amplifiers and it gave the same behavior? Is every component soldered back on the board right now?

L2805, L2806, L2815, and L2816 were desoldered - without them, there's no power outage, but no sound from the speakers. I replaced the amplifiers ALC1309D, reinstalled L2805, L2806, L2815, and L2816—there's still power outage during audio playback. The backstory is unknown. The customer was nagging me, so I returned it without repair.