[Rozwiązano] PIONEER VSX-921 - Błąd UE22, brak dźwięku mimo aktualizacji oprogramowania

This is usually not a simple “software update” problem; the thread points to a failing DSP/HDMI section, often temperature-dependent, and the real fix is reprogramming or repairing that hardware rather than resetting the receiver. Check the DSP firmware in standby with the Tune Up + Power key combo: if the display shows `***`, the SPI/NAND data is likely corrupted and the board needs a good dump / reflash, not just another normal update [#17812554][#17814444][#19758052] Several users report that the root cause is the DSP chip itself, so reballing the DSP or replacing it can restore operation, while simply blowing out dust or heating the chip only gives temporary relief [#16131068][#17850110][#19643312][#19615340] As a practical workaround, one user eliminated UE22 and got sound back by disabling HDMI audio, setting `TV audio` to `normal`, and feeding audio to the amp over optical instead of HDMI [#16926992][#17128468] If you want a permanent repair, the thread suggests an authorized Pioneer/Onkyo service or a shop able to reball/replace the DSP and reprogram the memory [#14736454][#17332019]