Naim ND5 XS2 does not start. Code 4-2-4

Hello everybody,
my name is Frank, i hope for any help for my Naim ND5 XS2.
All my components have been powered off for four weeks holiday. everything was fine before holiday, all was working.
I switched all on after coming back. The ND5 XS2 starts normal: Logo green, LED orange, mainbutton green. It seems to boot, but after about one minute it switched into standby: Logo not lid, LED permanent red, mainbutton blinking rhe code 4-2-4 (-**-). Mainbutton does not react when pushing.

Does anyone have an idea or explanation for this code?
I tried a factory reset within the first minute while booting, it did not help.

Thanks a lot,
Regards from Germany

Unfortunately this thread looks like possibly bad news, but try what the original poster was told.

I’m pretty sure that this is a hardware fault and you probably should take it back to your dealer for them to send for repair.