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pc wont boot doesn't even go to bios

I tryed swapping motherboards and once I did pc booted for ten seconds no display and turns off and back on in a continuous loop the board was used with a different proccesor so I decieded to wipe the cmos tryed the button battery and the jumper and nothing so I put all the parts in my original board and this time it stays on but no display all fans spin and the speaker makes a single beep I thought it might have been the gpu so I plugged into the onboard graphics still nothing I checked and made sure all cords are plugged in and they are
System: i5 3450 4x4 of ram two hyperx and the other two are just random that just came with the original pc
New mobo is a msi z77a gd55
Old mobo no name but is compatible with 2nd and 3rd gen processors
Psu 700w antec
Gpu r9 270x 4gb saphire
If u guys nead any more parts to help just ask
3 answers Last reply Best Answer
More about wont boot bios
  1. Best answer
    Pl disconnect all components. Try to power on the system with only cpu, built in gpu and one ram module. Give it a try.
    How to troubleshoot "No BOOT/No Display" Issue
    This guide will give you some basic steps on how to troubleshoot the No Boot / No Display issue, which is one of the common issues being posted on this forum. Follow the guide and it will help you to resolve the issue:1. Make sure that the CPU is supported... Read More
  2. After doing that on both boards it seams to work and I've installed everything and it all works
  3. Great. Congrats. Glad I was able to assist.
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