Hello everyone. I have a question regarding this TV I acquired as a defective item. I have repaired the backlight problem and is working fine now. The problem is this TV only supports PAL and DVB-T while I'm in an NTSC and ISDB-T country. I can tune in to analog TV channels and see the video even though the broadcast is NTSC because it automatically adjusts the video format but there is no sound. This may be because sound carrier for NTSC is at 4.5 MHz and for PAL its at 5.5 MHz. My question is: Can I adjust something in the hardware to make the subcarrier 4.5 MHz? Or is it the software? Thanks in advance.