No coffee, no flushing - water runs from above

Hi all,

I recently received a very cheap Jura Impressa F90. However, this one is unfortunately not working. I have the problem that neither when drawing coffee, nor when rinsing the water comes out of the nozzle. It runs directly from the top into the water tray....

Can anyone tell me what needs to be fixed? Can it be the drainage valve?

Troubleshooting. In the large video channel after Jura " Open housing" .....
1: KVA according to own discretion and knowledge repair.
2: Trace water paths and work according to the exclusion principle.
3: Forums after similar models on typical sources of error search and read.

I would first locate where the water comes from.
Then order the large seal set.
So and if big questions remain then one may ask gladly.

Glass ball are unfortunately sold out.
Sorry, but always hin something.

No I take over no adhesion at humans or KVA, if you under current stand or the KVA afterwards no longer functioned.

Trade never further than your level of knowledge.
(old Chinese proverb)

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Keine Anfragen oder Hilfe, über E-Mail.

Hello and first sorry for the very vague description of the problem.
I am now a little further and now need help in understanding the machine and the water flow.

I could check the machine so far that the water runs through the outlet valve and then goes into the brewing unit. From there, I'm afraid I lack understanding. What happens after that? I have completely disassembled the brewing unit and could not see a seal anywhere which may be the cause of the problem? Can anyone explain to me what is happening inside the brewing unit? Unfortunately, I can only see that the water is running from the top of the brewing unit. More can not be seen during the process

Thanks in advance!

Waterway=
water tank, flowmeter, pump, drain valve, lower brew cylinder, upper brew piston, crema valve, then to the spout (coffee spout)

Has the brewing unit been overhauled with drain valve?
So about Jura you can find quite a lot of Post's in various forums or on the well-known video channel.
Just like spare parts in the big search engine...
coffee machine spare parts

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Alles ist Wiederverwertbar, sogar diese Buchstaben.
Keine Anfragen oder Hilfe, über E-Mail.

So far, the outlet valve and drain valve have been replaced. The brewing unit is currently completely disassembled. Since I will now make me to the seals and hope that the problem is then history. Thanks for the input!