ESAM 4400: Display defective, machine running

Hello,

my DeLonghi ESAM 4400 slowly gets on my nerves: just repaired the heating block, overhauled the brewing unit, cleaned everything, suddenly the display failed (at night, in standby mode). Symptoms: The
display shows partially unreadable "jags/characters", but the machine runs when
operated
"blind"
- see example photo.

The flat cable from the power board to the display board

is ok (tested with the multimeter). What could be the reason
:1. The display board? (e.g. the
small capacitor / "battery")2. The display itself?
3. The power board? (but then the
machine
wouldn
't work?
)If it was the power board (electronics), then I would have an unused ESAM 3400 board (still sealed in a bag). Looks optically identical to "mine", but has another
product number:currently in

machine 5232119600 the

new,

unused: 5213210021 ("For ESAM 3400R")You

are probably

not interchangeable?


I would be grateful for hints!

I'm not an expert on this particular type now, but I would try a factory reset if there is one for this machine.

Hello,

so I don't know the code 5213210021. Please check this one, you must have read/typed yourself.
Regardless, I don't think it's your power electronics
, it's the display itself.

Your "sample photo" is not retrievable or visible.

..

Why leave the machine in standby mode overnight

????

Ever heard of saving energy?

@Martin (hobby technician)Werks Reset has brought nothing that would actually be expected. But thank you for pointing that out. @Steinhaeger666

QUOTE

so I don't know the code 5213210021. Please check this one, you must have read/typed yourself.

Please see the photo below.


..

QUOTE

Your "sample photo" is not retrievable or visible.

I try it again:

QUOTE

Why do you leave the machine in standby mode overnight????? Ever heard of saving energy?

The mains plug remains in the socket, the machine is off and the display shows the clock. So the machine can start automatically in the morning just before I get up - the mode I meant (is it not standby?)Yes, I've heard about saving energy before, but I don't quite think people pull ALL the plugs before they go to sleep.
I would be grateful for further information!

Yeah, okay, that standby thing was a mistake on my part.
I don't think people pull the plug at night either. But there's still the circuit breaker on the back. If you don't have it, your machine will
be a
bit older
...

The power electronics are not compatible with your machine, but that won't

be it.

What you can see so roughly on your photo-it will be the display, either new display or control board

.

Yes, I think so too - the circuit board or display. Unfortunately! at ebay I currently only find complete front panels with the circuit board for about 50€. It would be too much for me, while the machine can still be operated "blind".

I don't have a mains switch on the rear panel, the mains plug is plugged into an intermediate adapter with switch. I do not turn it off for the night because then automatic power on (at 6 o'clock in the morning) would not work.

I still exchange today, on "suspicion" the small buffer capacitor on the display board (shows 4V) - whether that brings what?
I'll be in touch.

QUOTA

"I still exchange today, on "suspicion" the small buffer capacitor on the display board (shows 4V) - whether that brings what? "

Didn't help, I'm afraid.
Maybe I try to change the display, but it might take some time until the part comes from China (aliexpress).