Sharp TU-X1U Service Manual page 31

YES
Does the HPD signal come from pin(19) of SC4501 (HDMI_OUTPUT) to pin (51)
of IC4504 (HDMI_Tx)?
YES
Are there the TMDS signal outputs at pins (12/10)(CLK-/+), (9/7)(D0-/+), (6/4)(D1-
/+), (3/1)(D2-/+), all of SC4501 (HDMI_OUTPUT)?
YES
Check the HDMI cable and Monitor Unit.
NO Check the line between SC4501 and IC4504,
and their peripheral circuits.
Check the HDMI cable and Monitor Unit.
NO Check the line between SC4501 and IC4504,
and their peripheral circuits.
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TU-X1U