. Firmware updates for this specific model are notoriously difficult to find because the manufacturer typically does not provide direct public downloads. JustAnswer Performance Review & Firmware Impact Update Availability:

Users often report "Drive not connected" errors during firmware flashes if the tray is not in a specific state or if background software (like PowerDVD) is actively polling the drive . Compatibility & Common Fixes Firmware Update for Matshita BD-MLT UJ240AS - Expert Q&A

Just a quick update: I’ve successfully completed a firmware update on my Matshita (Panasonic) BD-MLT UJ240AS slim Blu-ray drive.