Go to Menu → Installation → Factory Reset or Restore Defaults. Enter the PIN (usually 0000 or 1234). This clears old channel data that may conflict with the new firmware.

Plug the USB drive into any USB port on the receiver. Some 1509 models have two ports; either is fine.

A: Never. The 1G firmware is for 128MB devices. Flashing it will overflow memory, causing an immediate brick.

Plug the receiver back into power. Many 1509 models detect the USB file on boot and automatically show “UPdt” or “Updating...” on the front LED display. If this happens, skip to Step 7.