Sanyo DS31520 31" TV "hdmi cable high pitch noise" Questions

hdmi cable. Let me know if any of this is helpful in solving your issue or if I can be of more assistance. Once you respond I can help more, just need more information.. Thanks, d The high pitch noise

...hdmi cable. Any solutions or explanations. The tv is 7 months old Actually someone would have to open set and power it up--try to locate area where sound here is coming from.The first place would be ...