DS-7716NI-E4/16P suddenly has become incredibly noisy

[elisa]

Hello. I have a DS-7716NI-E4/16P which has become incredibly noisy this morning. I'm guessing it's a couple of years old. Is there an easy way to fix it?
Would you suggest it is worthwhile to call in a technician to repair it?
thanks for your help.
E.

 

[Phil]

If it is still working well for you then yes it is worth repairing it.
It is most likely the small cooling fan that is the source of the noise.
You can probably source your own replacement via the likes of CPC.
Otherwise, you'll need to contact your reseller and arrange a repair, which will most likely involve returning the NVR to them for repair.