I have been trying to build my first gaming computer. Well, I bought some used parts to start out. When I first started, I had a PC that would turn on (the fans and LEDs) but it would not POST, boot, or go into BIOS. It would also shut down after like 30 seconds and then restart. I fixed the restart issue by a new PSU. After I got the PSU, it still would not POST, boot or go into BIOS. So, I bought a different mobo off of ebay. It was an ASUS rampage 2 extreme. It was also used priced at $225 with no returns. That did not fix it either. Same problem. So then I switched out the GPU. Still nothing. Then the RAM. I tried a friends RAM. Still nothing. I then bought an MSI Z87-G45 mobo and an intel i7- 4770k CPU. It still doesn't work! I brought it to a friends house and we, together, found out that the CPU socket pins were bent. I sent it back and got a new one. It still doesn't work! I can't figure out what is wrong and it has come to last case scenario. BTW, the PSU is a Raidmax RX-1200AE. Any help would be appreciated greatly. I have put over $1200 into this POS and I would really like to get it working without wasting any more money.