Is my PC dead?

[staykoff]

Hey,
My brother bought a new PC and gave me his previous one. I took it apart ( I have some experience, I've build dozens successful PC configurations ) to clean it and then I assembled it back. Same case, same PSU, same mobo but a new cooler (Noctua NH-D15). The PC is i5-4670k  + Asus Maximus VI Hero combo. When I launched the PC for the first time it showed me 00 code and the mobo lighted up but the fans didn't rotate. I removed some cables and got the fans to start once and the code was 55. I restarted again and now I get 00 whatever I try and the PC won't boot. I tried removing all cables, I removed the GPU, everything but the MOBO won't run. Tomorrow I will take the whole PC apart again and see if I can get the MOBO to run without the case (this has happened to me before due to some grounding issues). Regardless. any ideas will be appreciated.

[Guest]

Are any of the diagnostic LEDs on? 

When you post, the code reader just stays at 00, or does it cycle through the sequence and then get stuck at 00.

 

Error 55 is memory not installed

 

 

[Midevil Chaos]

To add to what Shrimp says, try one memory stick at time.

[staykoff]

Taking it all apart, and reseating the CPU solved it. Thanks guys.