EQ.5 Macchiato does not draw milk

Hello, my ageing EQ.5 (E no. TE503501DE/14) no longer does what it should, but it's too good for the scrap heap.

Yesterday it stopped drawing milk or water through the milk frother, it just dribbled, but a lot of steam escaped from the machine. I couldn't locate a leak straight away.
I made two video clips about this.
#1: "Rinsing the milk system" process: Here it is noticeable that water splashes in a certain piston position.
#2: "Drawing hot water" process, as I didn't want to soak everything with milk. The error with the low output does not seem to occur spontaneously, but it will certainly come back.
A lot of steam is rising from where I don't think it should be.
The machine has been a bit incontinent for a few years now, and a small brown puddle has formed underneath it from time to time.
Can it still be saved (economically)?
I hope the videos work...

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