Missing capacitors is normal, I remove them to check some PCB tracks.
I also desolder U7 & U8, to check pads and via under these chips. The area seems to be ok.
I get +5V on the pin 2 of U8 (while in standby) and a ~1 second pulse on pin 26 of U7 when I try to power the computer using an ADB keyboard.
I'm pretty sure the problem is coming from the analog board (already fully recaped).
Because the SMPS doesn't seem to be able to start (it stops when starting, I can hear it).
I also tried to keep the Mac plugged during some hours, one of the transfo