Hi
I solved the issue. I was not the U2890. I was a broken trace underneath U2965- probably a result of the leaky capacitor and at that time for repair I did not notice the broken trace because it was underneath the IC. It was the connection from U2965 (pin8) to to U2890 (pin 10/9). - (working as an invertor). It was partially working because the inputs were coupling capacitively- that why I could it make worse by touching the IC with my finger. BTW the A5 schematic is totally wrong and does not show that connection ( show to a different gate of U2890). Fortunately I had working A5 board and I could measure the traces..
Maybe there is an update schematic - please let me know.
Bernd
