Hello,
I am only writing here because I had the same problem and wanted to tell you what was going on with me. Maybe it helps someone.
Symptoms:
Switching on, machine "warms up" so the power button flashes slowly for about 2-3 minutes. The two coffee buttons then flash quickly back and forth as described above. Nothing works anymore.
Diagnosis:
What I found very helpful was the hints from "Frahlingliebhaber" to press and hold both keys and then switch on the machine. After approx. 5 seconds, the machine allows water to run through for a further 5 seconds. So on the one hand (in an admittedly arduous mode) you could do a decalcification, but that wasn't my problem. On the other hand, what you can determine very well with it is whether the heating still works. So: Switch on once as normal and wait until the 2-3 minute "heating phase" is over and the keys flash alternately. Then switch off again, keep both keys pressed and switch on again. Wait until the water comes and check if it is cold or hot. I was cold. That means the heater's not working. Therefore, the coffee machine has also signalled an error (= alternating flashing), because after several minutes it "heat up" runs into a timeout and then gets "still cold" signaled by the sensor.
This can have two main causes: 1. The desoldering fuse on the thermoblock has melted through. 2. The switching relay is broken. Both can be checked with a multimeter when the machine is screwed on. This is somewhat difficult to achieve as Nespresso has kindly installed screws with special heads. A little pliers will help. Then it is best to screw in normal screws (the normal device screws for flush-mounted sockets of the electrical installation (3.2 x 15) work quite well here).
In my case it was the relay. If this is the case, the diagnosis can also be carried out more easily: Normally you can hear the relay switch clearly after switching on in the warm-up phase. I didn't hear anything more about me.
Therapy:
In my case: Replace relay. This is a bit hard to get part, but I bought another one from Conrad (of course it has to fit regarding voltage and current and should fit halfway) and soldered it in with wires, because it didn't fit directly on the PCB. After that everything went fine again :-).
All in all it took about 2 hours (without the time to get the relay, but including the whole troubleshooting) and left the good feeling of having repaired something instead of throwing it away. :-)
Hoffe this helps somebody,
Sven
P.S. If it was your desoldering fuse and not the relay, I would be careful with repairing it. This would mean that it has become too hot (it sits directly on the thermoblock). Since this can happen again at any time, I would first look for the cause for it (defective temperature sensor, etc.). Otherwise the device might really burn down...
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