VANGUARD sound problems

[vernimark]

I'm closing the Zaccaria Vanguard restoration but I have 2 problems on the sound board


1-------------------------------------
I have a continuous white noise in the background. All sounds seems to be ok, music, shots, explosion, ... but this noise is always there.
I can see there isn't a real classic noise generator and I think everything is generated by the two 76477 chips.
I have the SMD version and I haven't the right tools to remove them so if you have any other idea please tell 

2-------------------------------------
No voice at all, now...
the first times I plugged the board I heard something then las time the voice was quite corrupted and now nothing.
Suggestions?
Is there  a source for the 2 chips HD38882 and HD38880?

[Belike]

The first problem is not a problem, it is normal.
I might have a non-working spare pcb, I'll check those chips.

[vernimark]

REALLY???
I already changed all operational amplifiers (LM... and MB...)and recapped all sound part 

So I can go to the speech board...