Nevermind, since you got it working - I just meant the old red caps on the sound control board.
And i think they are in Martins kit, so maybe I have been looking at a before pic in your shared album 😁

Well done, chapeau!

Ha yeah the picture was not up to date 😉

Thank you jesperb! And all the others from beoworld 👌

I appreciate to have support and advices, the beomaster is a real mess haha

I'm glad to tell: I made it! It's now working and the sound super clean compared to before (the saturated bass problem is only at high volume, and with headset). I'm super happy to make it work as new again. The sound quality is not incredible, but good enough (the capacitors from the kit are not audio grade, as the one this repair shop used https://beolover.blogspot.com/2017/11/beomaster-1900-type-2903-recapping.html?m=1).

I tried, I really tried to find the needed capacitors from the datasheet, but even with an exhaustive list, finding the new one looking the same as the picture was almost impossible and expensive. 

Ps: should I consider replacing the two big "reservoir capacitor"? Or until it's work it's fine?

And should I consider replacing the 2-3 4,7uf in small green shape? They were not present in the kit, and I might able to read "loudness" around them in the pcb. Maybe they are dead and produce saturation in high volume? 

I have to find a replacing light bulb, one died during the repair..

Anyway, Thx everyone :)