Search the web and see if anyone else is having a similar problem, could be that a recent update is the cause and you'll just have to roll-back or wait for Sony to come out with an official fix. The next best alternative is to simply send your PS3 to Sony, they'll repair it for free granted you claim it as a factory defect and all you have to do is pay shipping, which is cheaper than buying one used.
You could also just wait and then buy a PS4 this coming November.