We DO NOT provide downloads of 'Official Firmware' that's what the Manufacturers Support Site is for.
http://support.asus.com/download/download_item_mkt.aspx?slanguage=en-us&model=O!Play%20HDP-R1
http://support.asus.com/download/download_item_mkt.aspx?slanguage=en-us&model=O!Play%20Air
We DO provide some checksums of 'Official Firmware'
** Please ensure the television system or standard used in your country or location before updating the firmware.**
Copy install.img to the root directory of a USB flash drive and connect it to the USB host port of the player.
Enter the Setup menu:
System -> System Update -> System Upgrade and Enter to confirm.
Please wait for the flashing to complete (upto 2 minutes) until the player restarts by itself.
** Do not power off the unit during the flashing process! **The HDMI connection may reset after updating the firmware and may go out of sync with your display.
Press the TV SYS button on the remote a few times to sync with a compatible display mode if this happen.
Once the display is back, we recommend setting to HDMI Auto in the video setup menu unless a manual mode is preferred.
Version 1.21
Version 1.18P
Version 1.18N
Version 1.17N
Earlier Firmware
Asus Official Downloads: http://support.asus.com/download/download.aspx?SLanguage=en-us