I am trying to upgrade my CPU from the Intel core i3 6100.  To the Intel core i5 8400.  When I put the new chip in and try to start up I get a single yellow/amber flash.  I tried resetting cmos/bios but that did not seem to help.  When I put my old chip back in everything came on fine but the bios had been reset.  Could this be a power supply issue or something else I am missing.  They are the same socket as far as I know I have done this with a few other PC with success but am still new so any help would be awesome.