820-00923 No audio device. everything else works

[Roshon]

the board has no water damage it came in with bad screen and no sound i change screen but no sound it says no audio found
u6200
pp1v8_so 1.8v
HDA_SDOUT 0V
HDA_RST_L 0V
HDA_SYNC 0V

 

[2informaticos]

Check all the resistors and traces between PCH and audio codec (HDA bus),

 

[Roshon]

The diode measurement on the HDA lines was around
HDA_SDOUT .886
HDA_RST_L .916
HDA_SYNC .916
HDA_BIT_CLK .903
8409_HDA_SDINO_R .840

 

[2informaticos]

I meant to check the value of the 33 ohm resistors placed between PCH and audio codec; like R1300/01, etc...

 

[Roshon]

HDA_SDOUT R1302 = .886
HDA_RST_L R1303 = .916
HDA_SYNC R1300 = .916
HDA_BIT_CLK R1301 = .903
8409_HDA_SDINO_R R6203 = .840

 

[2informaticos]

I can't believe...
Can you check if all mentioned resistors have 33 ohm and good traces continuity???
I never asked to check diode mode to ground!

 

[Roshon]

HDA_SDOUT R1302 = 35 ohm
HDA_RST_L R1303 = 35
HDA_SYNC R1300 = 35
HDA_BIT_CLK R1301 = 35
8409_HDA_SDINO_R R6203 = 35
all the traces i can see look ok

 

[2informaticos]

Try another audio codec...

 

[Roshon]

can you recommend where to get them

 

[2informaticos]

Any from A1706/07/08 should work...

 

[Roshon]

I Tried another audio codec. still nothing

 

[2informaticos]

Possibly broken traces, or knocked off components.
Or even PCH internal problem...