I have this NUC working as HTPC.
After a few years of flawless working it began to boot on second attempt, like as it was discribed here https://forums.intel.com/s/question/0D50P0000490SN5SAM/nuc-dn2820fykh-kit-shuts-off-after-switch-on
Finally it came up to no boot at all (I think it happened after eletricity loss).
When I start NUC, it beeps 4-5 times through earphones at 1 Hz frequency and shuts power off. TV says 'no signal' forever.
I've tried to do a BIOS recovery, but NUC didn't even react on holding power button, nothing changed. I've tried to install another DDR3L module, nothing changed either. I thought maybe it was power issue. I've checked output voltage and it was near 12 V stable.
So what options do I have now, should I take it to repair? I don't think that any local services had experience with this sort of hi-tech engineering... :-\