sharp lc32l400m

[willyam1]

hi to all.
problem is pic ok but no sound in all inputs.
when I touch my finger in the smd amp ic I can hear some noise in the speakers.
I try also all the menu reset and also the factory reset no joy.am I missing something in the reset procces or I just have to order a new main board its seems .
that it cant be repair (the main board).anyone hade the same problem?.
thanks willyam

[tom66]

Re: sharp lc32l400m

What equipment do you have - oscilloscope?

[budm]

Re: sharp lc32l400m

Does it have Audio line level OUTPUT Red and White RCA jacks? If it does, try using that outputs to feed powered speakers such as PC speakers system to see if you get the sound from those two RCA jacks OK.

[willyam1]

Re: sharp lc32l400m

Thanks tom66 and budm yes i got osci.
But its seems to me that the problem is in the main ic wiyh big cooling.
Ther is no way to get to that ic.
I will check about what budm suggestion.
Willyam1

[tom66]

Re: sharp lc32l400m

Well, once you try budm's suggestion, you can look up the datasheet of each chip in the audio chain and test the output with a scope, and see if one chip somewhere is malfunctioning.