Today I removed my Humax Youview box and later reconnected it to my amp via HDMI. Now when the box boots up, the sound is delayed by about one minute after the picture appears. I changed the HDMI lead and it made no difference and also tried different inputs on my amp, but the problem remains. If I switch the box off after it has been running for a while, then switch it back on, the sound comes up immediately. Any advice or help appreciated please.