KV32FQ86 Problem !

Hi everyone, I am new to this forum and need some help please.
I've had my KV32FQ86 for a month now.
Overall I have been impressed with this tv, but ....
On Friday, after being on for a couple of hours it just switched off and on again.
Didn't really think much about it, except that it did it yesterday again after being on for a couple of hours.
After reading various sites, it says that the KV32fq70 suffered from this also.
Does anyone know what the problem is ?
Should I ask for an exchange ?
Any help would be appreciated
Thanks