If you are experiencing "locks" or errors during an update, use the following troubleshooting steps:
Firmware releases for the VSX-934 have historically targeted both functional improvements and the introduction of new technologies:
Firmware updates for the Pioneer VSX-934 are designed to add major audio features and improve system stability for
Turn off the VSX-934 using the front panel power button. Insert the USB drive into the SERVICE PORT (not the standard USB input on the front; check the rear panel for the service port label). pioneer vsx934 firmware update fixed
