I swapped out an older motherboard with a used socket LGA 1155 motherboard and it wouldn't post. Upon further inspection, I found that the cpu socket had missing pins! Be careful buying
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LGA 1155 cpu list – all processors Intel: Xeon, Core I7,Core I5, Core I3, Pentium, Celeron – FCLGA1155 socket (specifications) – CPU-LIST.COM
used Intel Core i5 3570K 3.4GHz 6MB 5.0GT/s SR0PM LGA1155 CPU Processor - Price history & Review | AliExpress Seller - RE Store | Alitools.io
Buy Wholesale China Second Hand Intel Pretium Dual Core Pull Out Cpu G4400 & Pull Out Cpu G4400 at USD 10 | Global Sources