i've just started having this quirk with my rig the last couple of days, and looking for some ideas as to what the issue could be.
rebuilt my rig the other week with a p5q-deluxe as the previous mobo was starting to fail. now haven't been home much recently due to work. friday night booted up and noticed that neither intake or extract fans were going (more the intake as it's an led fan) but the fan on the cpu was fine.
so gave the extract a little spin up with a finger and it started to go and the led intake fan kicked in to. now if i do a reboot the same happens.
now the only things i can come up with are.
a. that both fans are getting a bit worn, although i can't believe that it's both of them 1 ok but not 2.
b. there is an issue with the motherboard fan headers. are all fan headers commoned up on a mobo? or are the case fan headers seperate from the cpu fan header, or are they all seperate? main reason i would think of this is that it is both fans that fail to start, and if there was a problem at one header would it replicate on the other? the other thing is that when i spin up the extract fan both of them kick in, but lastnight i noticed that for a few seconds 1/2 of the led's on the intake were flickering (would that to point c. the psu?) but then settle down.
c. lastly the only other thing is the psu, i don't thinks so but not sure. it's an ocz evo720, and all thats plugged in is the 24pin mobo/8pin cpu/ 6pin gfx and 2 sata ppower for 2xhdd and dvd.
any way to conclusively prove what it might be without having to use any spares - which i don't have at the moment. really don't want it to be either the mobo which is only a month old or the psu which is quite a bit older but still fine. if it's the fans - then fine i can grab a couple of them no probs.