HDMI/Yamaha issues

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Did yo visit go.roku.com/HDPChelp

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Since you are using a top-tier receiver with high-quality Zeskit cables, the issue likely isn't hardware quality, but a handshake protocol mismatch or a software setting within the Yamaha’s deep menus.

The "HDCP Error" and the "blipping" (signal dropping) happen when the content protection signal from your Roku/Apple TV fails to verify with the TV through the receiver.

Here is a checklist to resolve this, ordered from most likely to least likely:

1. Change the HDMI Video Format (The "4K/8K Mode")
The RX-A6A defaults to a "Standard" mode that might be confusing the handshake with your older Sony XBR-900F (which is a 4K TV, not 8K).

On the Yamaha remote, go to Settings > HDMI > HDMI Video Format.

Try switching the inputs you are using from 8K Mode to 4K Mode (or vice versa).

If that doesn't work, try "Compatibility Mode" if available. This often solves handshake issues with older 4K panels.

2. Match the HDCP Version
The RX-A6A uses HDCP 2.3. Your Sony 900F likely uses HDCP 2.2. While they are supposed to be backwards compatible, they often "glitch."

In the Yamaha settings, look for HDCP Version.

Instead of "Auto," manually set the inputs to HDCP 2.2. This forces a more stable connection for that specific TV.

3. Check the Sony Bravia Settings
Sony TVs have a specific setting to "unlock" full HDMI bandwidth. If this is off, the Roku/Apple TV will constantly try to push a signal the TV is rejecting.

On your Sony TV: Go to Settings > External Inputs > HDMI Signal Format.

Ensure the HDMI port connected to the Yamaha is set to Enhanced Format.

4. The "Cold Boot" Reset
HDMI handshakes sometimes get "stuck" in a bad state.

Turn everything off.

Unplug the power from the wall for the Yamaha, the Sony TV, and the Roku.

Wait 60 seconds.

Plug the TV in first, then the Yamaha, then the Roku. This forces a fresh "handshake" across the entire chain.

5. Disable HDMI Control (CEC)
If the blipping persists, "HDMI CEC" (which lets one remote control everything) might be causing a conflict.

Try turning off HDMI Control or ARC/eARC in the Yamaha settings just to see if the signal stabilizes. If it does, you know the conflict is in the CEC communication.

A Note on your Cables
Your Zeskit 2.1 cables are excellent, but they are very thick and heavy. Ensure they aren't "sagging" out of the ports on the back of the Yamaha. High-end receivers have crowded back panels; if the cable is even slightly tilted, it can drop the HDCP pin connection (the "blip").

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