PlayStation Support has opened a thread on the official Sony forums for users experiencing problems with the PS4. The post lists "blue indicator light blinking," "no video/audio output to television" and "console powering off after blinking blue" as potential symptoms, but does not point to single cause.
Instead, the post suggests issues may stem from TV compatibility alongside potential issues with the PS4 power supply, hard drive or "other PS4 hardware." The frequency of these issues was not confirmed in the post.
To troubleshoot the system, PlayStation Support suggests performing a hard reset, checking your hard drive connection, booting the PS4 in Safe Mode and checking the firmware of your television. If none of the above work and you need to contact Sony for further assistance, the company suggests using live chat as opposed to calling in. All contact information can be found here.