My friend has now a PS1 SCPH-1000 PU-7 Board. He said that the startsound comes up brilliant and long as it should. When he puts an audio CD in there, there is no music, just a cracking noise. After we swapped a couple of different IC´s, we found out that the IC305 was broken down. After we swapped...

Thanks a lot shadow!!!
It was the IC305. My friend swapped it and now it works fine.

I will try that later on. Thanks a lot for your quick reply. PS: is it possible that my startsound got lost in the BIOS or is it saved somewhere else? I have also another question, my friend has also a playstation 1 SCPH 1002, his CD ROM is spinning without stopping. BIAS and GAIN ist on its voltage...

I just found this thread and I am new on board.

I have exactly the same problem. I miss the startsound in my SCPH 1000. It was all over sudden gone. Everything else works fine. Is there also an IC I can check?