[SOLVED]820-3437-B Sound Issue - No Output Devices Found

[veejay]

No water damage, the audio jacks looks OK. Customer says it used to work with a PRAM reset but now it doesn't.
Although the chime is present when turn on, most times in System preferences it says that No Output Devices found. If it works, when youtube for example is playing something the sound dies and the volume bar is gone when pressing the buttons and the Mac becomes laggy.
In Diagnostics it gave me once : There may be an issue with the audio hardware. Reference code : VFF001

 

[dukefawks]

All audio is on the IO board. Try another IO board and flat cable.

 

[veejay]

Changed both and appears to be OK.

 

[dukefawks]

Appears to be working now or the IO board that was in there appeared to be ok?

 

[veejay]

No, I've changed the IO board and the flat cable (got a good deal on eBay for both) and everything seems to be OK. You can mark this as SOLVED. Thanks!