it's a CV1 unit. several years old, probaly not on warranty anymore.
check if it's on warranty. if you bought it with your credit card, check if there isn't a warranty extention program associated to it.
If you confirmed it's not on warranty, well you could always try a teardown.
https://fr.ifixit.com/Vue+Éclatée/Oculus+Rift+CV1+Teardown/60612
Check if everything is plugged right (especially the ribon cables). if you see obvious damage, you may be able to find the spare part on amazon or ebay
i repaired lots of things by myself (PCs, laptop's keyboards replacement, power supplies on TV/ monitors, even a hidden blowed fuse on a fridge once !) it's not that hard. just use common sense and be patient.
It's stunning to repair something for pennies sometimes (hello bad caps), and save 100's of $. women like that a lot too