I'm sorry to say that you will have to send this in somewhere to get repaired. If you got if from Ebay or somewhere that you can send it back I would do that ASAP. There is no easy fix for this. Either someone sent you a defective console or it was dropped from a significant height during shipping.
Most of the time this problem is caused by either a faulty power supply or faulty solder joints under the APU. Repairs for this kind of problem are not 100% so there is a chance that it can't be fixed. This is why you should try to get your money back if you can.
There are multiple repair shops that should be able to fix this for you. My repair shop is one of them.