Benq w1070 hdmi outputs not working

Hello.
I have had a benq w1070 projector that has 2 hdmi ports that don't work.

History.
I was told that it went through a power surge through an electrical storm.
however the customer informed me that he was still able to use 1 of the hdmi ports.
And it worked like that for a year until it went through another power surge.
Which he then lost the 2nd hdmi.

I have had a little look and it appears it's a good chance that it is the adv 7612

Anyone when experienced this before ?
 
Hello, sorry for delayed response.

I've tested some data and clock lines.
They are as follows.

Hdmi 1 ddc data 720
Hdmi 0 ddc data. 068

Hdmi 0 ddc clk 459
Hdmi 1 ddc clk 737

I have check dn44, dn52, dn51, dn42 all open port side and reading open line and on other side was reading 003

any help is appriciated
 

2informaticos

Administrator
Staff member
"Hdmi 0 ddc data. 068"
Looks like damaged HDMI block.
Remove any protection diode connected to ground on data lines and check again.

You named lot of components, but didn't provide any schematic.
 
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