PS4 won't work after cleaning the fan

Hey guys, so I just cleaned my PS4 fan and power supply this evening following this guide: http://ift.tt/2eIpkJa (credits to MisterKrayzie).

After reassembling my PS4 and trying to turn it on it now turns off after the initial beep and blue light. It lasts for like a second and then turns off.

What I've tried:

• Re-open the PS4 and reassemble it more than once.
• Hold the power button and try to rebuild the PS4's database (it simply acts the same as if I just pressed the power button).
• Take out the power cord for about a minute and put it back again.

None of these methods shown any success, still the same problem. My PS4 is a white model one, bought December 2014. All I could find using the search feature were the bullets above.

Did anyone have the same problem before and if so, how did you solve it? Thank you for your time guys.