HDMI amplifier
The main reason we have stopped repairing amplifiers with HDMI inputs is their highly complex digital design. Unlike an analog audio amplifier, the HDMI section involves high-speed digital signals, DSPs, microcontrollers, and tightly interlinked software/firmware, which makes accurately isolating faults extremely difficult. Another major reason is the unavailability of spare parts in the market. HDMI ICs, controller chips, and original HDMI boards are often not available for purchase. In such cases, even if used or so-called compatible parts are used, long-term reliability cannot be guaranteed. Some HDMI amplifiers also come with service manuals that contain incorrect or incomplete technical details. Because of this, signal tracing, voltage reference checks, and firmware-related diagnostics can lead to wrong assumptions, making it difficult to achieve a 100% accurate repair. Another common issue we face is that even after repairing the HDMI section, faults tend to reappear with...