Home Theater Static Noise Fix

I'm seeking an experienced technician to eliminate a loud, intermittent static hum or hiss from my home theater system. The noise resembles an electrical short. Key details: - The receiver/amplifier is suspected as the source. - HDMI cables are suspected as potential culprits. - The noise occurs randomly, not tied to specific media or volume adjustments. Ideal skills and experience: - Expertise in home theater systems, especially with receivers/amplifiers. - Proficient in diagnosing and repairing issues with HDMI cables and connections. - Ability to troubleshoot electrical noise in audio equipment. Please provide a detailed approach for isolating and fixing the issue.