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15. HDMI mode

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Is only video

normal?

Is only audio

normal?

Yes

Download EDID data each port.

Check the TMDS line wave.

(R312~E3273)

1. Check the HDMI receiver’s status register. (0x60, offset 0x66)

- If the value is 0xf or 0x8, it is normal.

2. Check the HDCP register. (0x6, offset 0x32)

- Enable bit 6 : HDCP key loaded

- Enable bit 5 : HDCP decryption active

- Enable bit 4 : HDCP authentication attempted

Reset TMDS power down/ on register.

- 0x60, offset 0x3f => 0xff

Check HDMI source.

Change to another source or cable.

Yes

Is the wave

continuous?

Normal video,

Normal audio?

Yes

Replace the IC303.

1. Check TV input mode.

(HDMI 1 port support HDMI and DVI.

So if you input DVI signal and PC audio from

phone jack, You can hear PC audio.)

2. Unplug and plug in the HDMI cable.

(sometimes ESD surge occurred at HDMI port.)

3. Check the HDMI Mute register. (0x68, offset 0x37)

4. Check the Audio-out channel mute register (0x68,

offset 0x32) is appropriately enabled.

Yes

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LG 42PC51 Specifications

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