My OPPO N1 could not switched on

I have been using OPPO N1 for almost a year now and I am very disappointed. My OPPO N1 unable to switch on and this is the third time I have encountered this. I tried the steps given -

Charge the battery for 1 hr, unplugged the power and wait for 2 hrs before switch it on. I have tried this steps so many times, but still the same. I can't keep on sending my phone to OPPO centre. Do you have any solution to resolve this. Now that my warranty just ended last month I am not going to spend money just to fix this every 4 months.

Appreciate your help on this.