P7007 may have problem. Replace this Jack.After checking the Power of this chip, you should decide to replace this or not.After checking the Power of this chip, you should decide to replace this or not.After checking the trace of TMDS lines and power of MST3361, you should decide to replace MST3361 or not.After checking the Power of MST3361 you should decide to replace MST3361 or not.This board has big problem because Main chip(BCM3550) have some troubles. After checking thoroughly all path once again, You should decide to replace BCM3550 or not.
NoNoNoNoNoYes
YesYesYesYesYes
Check input connect P7007. Can you see the normal waveform?Check DDC communication lines(IC7013 Pin5,6)Check HDCP communication lines(IC7005 Pin5,6)Check the input of MST3361(IC7004) This signal is TMDS. Can you see the normal waveform?Check the output of MST3361(IC70 Can you see the normal waveform?04 ).Check the input and output of BCM3550(IC4006). Especially you should check The H,V sync and clock. Can you see the normal waveform?
5. HDMI doesn't display
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