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Posted 06 July 2017 - 01:03 PM
Posted 06 July 2017 - 01:45 PM
The power needs to be disconnected when you clear the CMOS. If it was, if you reset the CMOS by shorting jumper pins, try instead removing the CMOS battery for a good period (20 minutes should be more than enough).
Have another look at the CPU socket pins using a flashlight, and looking at them from different angles. Even one slightly bent pin, if it's a crucial one can stop it working, and it doesn't take much to bend them. A few slightly bent may be repairable if you're careful.
Other than that it sounds like you've tried all the things I would. The chances of it being the CPU are less than a motherboard fault. The chances of it being 2 CPU's are even less still. The trouble is new LGA1155 motherboards are not widely available now, so you might be looking at used parts if you do decide to replace.
Posted 06 July 2017 - 03:19 PM
Posted 06 July 2017 - 03:53 PM
I would have to concur with the post above. Something is missed. A few things to consider...
-CPU not mounted correctly (bent pin)
-Silver thermal compound shorting out the cpu
-Fan power not plugged in (Warning Beeps adn shutdown indicating cpu fan not connected at all)
-PSU 4 pin connector not connected to the motherboard.
-BIOS settings are messed up and the CMOS chip needs a reset by pulling the battery or moving the jumper. Be sure to pull power plug from the wall before reset.
-Worst case CPU and or both Motherboard/CPU is done fried. Without a Heatsink mounted correctly a CPU will burn itself out almost instantly.
Posted 06 July 2017 - 04:04 PM
Posted 06 July 2017 - 04:46 PM
Check that the memory is seated properly. Go over all the wires again. Main harness etc. If it doesn't post after putting in the i3 and a reset then I am afraid you have blown something out. Time to take it to the shop they can test both. A bad cpu can kill a new mobo and vice versa.
Posted 06 July 2017 - 05:15 PM
Posted 06 July 2017 - 10:31 PM
Good luck. With all those extra parts you should be certain to get something working at the end of it!
Posted 12 July 2017 - 02:47 PM
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