You can find the software and firmware updates through the following sources:
To download the firmware for the 1440x900 resolution, you can access specialized firmware repositories and community boards for LED/LCD TVs. This board is a universal controller often used for display conversions. Download ITV V59 031 1440X900 USB rar
Plug the USB into the TV board and power it on; the indicator light should blink during the update process. You can find the software and firmware updates