So, laptop was with dead cpu, replaced. Now everything works except i have problems with audio. The problem is related with long audio cable that from one side is plugged in the motherboard and on the other side is connected to audio daughter board that goes on the top of the laptop(behind screen). The symptoms are:
1. In bios everything ok (with long audio cable on connector j3701 connected or not),
2. With windows installed everything ok if long audio cable on connector j3701 is not connected,
3. With windows installed and long audio cable on connector j3701 is connected i will have symptoms of loading windows then freezes everything, or only asus logo with slow turning wheel. So basically if audio cable connected the board is not working.
5. if its not connected then everything is fine and i can play games...and so on.
What i did so far: checked capacitors for short, replaced ALC668, replaced u3701 and u3901 audio amp chips, replaced all ferrite bead in that area (even though they were good). Checked j3701 connector for shorts but everything is ok. Ordered another long audio cable on connector j3701 but same, ordered another audio daughter board but the same.
When i measure heat in that area when long audio cable is connected, it is very hot...it goes to 55 C. The most heated area is around ferrite bead and audio amp chips.
And the funniest part is if I stretch the long audio cable the windows will load normally and if i connect the audio daughter board at the end the sound is fine. But the moment i release audio cable in normal state (not stretched) the symptoms start again. Thats why i bought the second audio cable but symptoms are the same.
I dont understand what is happening...i can make video of this really weird problem...anybody have any idea?
schematic link: https://www.badcaps.net/forum/showth...hlight=g752vsk
1. In bios everything ok (with long audio cable on connector j3701 connected or not),
2. With windows installed everything ok if long audio cable on connector j3701 is not connected,
3. With windows installed and long audio cable on connector j3701 is connected i will have symptoms of loading windows then freezes everything, or only asus logo with slow turning wheel. So basically if audio cable connected the board is not working.
5. if its not connected then everything is fine and i can play games...and so on.
What i did so far: checked capacitors for short, replaced ALC668, replaced u3701 and u3901 audio amp chips, replaced all ferrite bead in that area (even though they were good). Checked j3701 connector for shorts but everything is ok. Ordered another long audio cable on connector j3701 but same, ordered another audio daughter board but the same.
When i measure heat in that area when long audio cable is connected, it is very hot...it goes to 55 C. The most heated area is around ferrite bead and audio amp chips.
And the funniest part is if I stretch the long audio cable the windows will load normally and if i connect the audio daughter board at the end the sound is fine. But the moment i release audio cable in normal state (not stretched) the symptoms start again. Thats why i bought the second audio cable but symptoms are the same.
I dont understand what is happening...i can make video of this really weird problem...anybody have any idea?
schematic link: https://www.badcaps.net/forum/showth...hlight=g752vsk
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