I just tried to update the firmware on a Sony LCD TV and it apparently killed the TV. It got almost through the process and then just displays the Bravia logo. The amber picture led and red standby led stay on (no flashing). The only way to turn it off is by unplugging. There's no response to the remote. There's also no response to the reset sequence. I was updating because two of the HDMI ports stopped working. Can a failed firmware upgrade corrupt the eeprom with no way to recover? Does the main board have to be replaced? Any help would be appreciated. Thanks