Motherboard won't post/boot when swapped to a different case

I have two PC's. Each in their own case. I took mobo#1 out of case#1 and put it into case#2, but it won't boot. It won't even post. I moved mobo#1 back to case#1 and it boots fine. mobo#2 also boots/posts fine in case#2. Mobo#1 just will not work in case#2.

I've swapped them 4 times now thinking each time that maybe something fried or broke, but they work fine in their respective cases.

I know I'm hooking everything up correctly, so not sure what the problem could be from one case to the other.

PC#1
-ASRock z68 Pro3 Gen3
-intel 2500K cpu
-old crappy, generic atx case
-650w psu

PC#2
-EVGA nForce 780i SLI
-old intel quad core Q9550(I think).
-nice thermaltake armor+ atx case (lots of fans)
-850w psu.

So I really want to swap them. Not only to put the better cpu in the better case, but also to use the bigger psu.

Any ideas? This is the second weekend now fighting with this. Desperate for a resolution.

*update#1 - I moved psu from case#1 (crappy one) to case#2 just to see if that would work and it doesn't. Makes me think that the power switch is bad on case#2. BUT the fan for the psu#1 comes on, so it can't be the power switch, right - because the psu must be getting some kind of signal from the mobo.
5 answers Last reply
More about motherboard post boot swapped case
  1. Make sure their are no unused standoffs touching the bottom of the mobo causing a short.
  2. Dunlop0078 said:
    Make sure their are no unused standoffs touching the bottom of the mobo causing a short.


    Great idea, but just looked and every standoff is lined up with a hole. There are 3 other standoff's that aren't used (mobo#1 is not a full ATX though mobo#2 is full ATX), but I don't think that should make a difference.
  3. knightbringr said:
    Dunlop0078 said:
    Make sure their are no unused standoffs touching the bottom of the mobo causing a short.


    Great idea, but just looked and every standoff is lined up with a hole. There are 3 other standoff's that aren't used (mobo#1 is not a full ATX though mobo#2 is full ATX), but I don't think that should make a difference.


    Micro ATX and ATX use different standoff positions, so make absolutely sure their are none touching the bottom of the board. If thats not it I would try only plugging in the the power connector to the mobo, from the case's front panel wires then try to turn it on.
  4. Thanks Dunlop for your help.

    What it actually was - I jumped the plugin to the motherboard to test the PSU and it split apart the connections inside of that cable a little too far so no power was able to get to the motherboard via the main plug-in.

    I used a safety pin and just kind of pressed them closer together and it works now.

    Thanks again for your help and suggestions. If I wasn't digging around with the standoffs, I may not have thought to look at that.
  5. knightbringr said:
    Thanks Dunlop for your help.

    What it actually was - I jumped the plugin to the motherboard to test the PSU and it split apart the connections inside of that cable a little too far so no power was able to get to the motherboard via the main plug-in.

    I used a safety pin and just kind of pressed them closer together and it works now.

    Thanks again for your help and suggestions. If I wasn't digging around with the standoffs, I may not have thought to look at that.


    Well that will do it, im sure I would be stumped for a while on that too I haven't seen that happen very many times.
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