http://www.computerandvideogames.com/438181/early-reports-of-broken-ps4s-begin-to-surface/
Oh boy, well this certainly isn't good for Sony. Hopefully Sony will fix this...somehow.
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Just like any brand new electronic product, there are bound to be a few with issues. I find no issue to be overly concerned yet. IF there were dozens of reported issues then yes I would be concerned, but the total is only 5. Due to a combination of poor handling by retailers, manufacturing defect to possible user caused.