i have tried two psu and motherboard wont post

[Julian98]

I am using an i5 3570 on a p8b75m-le. i have tried two psu, one evga 500w and another corsair 430w. they both work with a paperclip to power harddrive and case fan but when i try to turn on motherboard, the fans spin for 1 sec and then turn off again.1 stick of ram, cpu + fan and both power connectors in. is this a problem with the cpu or the motherboard? i will probably buy a cheap 1155 motherboard from ebay to test the cpu but wont get here till a few days and was hoping is there any other way to test it ? reseted cmos as well did nothing, and no beeps from the speaker but the motherboard LED lights up.

 

[captaincharisma]

have you checked to see if your CPU isn't overheating. if you have enough time before it turn off you can sometimes get into the bios and it will be on the temps will be on the main screen but check to make sure the CPU isd installed right

 

[Julian98]

have you checked to see if your CPU isn't overheating. if you have enough time before it turn off you can sometimes get into the bios and it will be on the temps will be on the main screen but check to make sure the CPU isd installed right

the motherboard doesnt post or turn on, the fans spin for a second and switch off again

 

[herrwizo]

Sounds like the board doesn't have a BIOS version which supports your CPU. If it is version lower than 0501, it won't work.

Unfortunately, this theory is impossible to test without either a supported CPU (say, Core i3 2120) or a different mobo. Cannot even rule out the RAM stick, no matter the fact that there are no beeps.

 

[captaincharisma]

have you checked to see if your CPU isn't overheating. if you have enough time before it turn off you can sometimes get into the bios and it will be on the temps will be on the main screen but check to make sure the CPU isd installed right

the motherboard doesnt post or turn on, the fans spin for a second and switch off again

then there is nothing else you can try really then reinstalling all the parts or if you are able to try the PSU on another computer.

 

[Julian98]

Sounds like the board doesn't have a BIOS version which supports your CPU. If it is version lower than 0501, it won't work.

Unfortunately, this theory is impossible to test without either a supported CPU (say, Core i3 2120) or a different mobo. Cannot even rule out the RAM stick, no matter the fact that there are no beeps.

is there a way to flash a bios without it booting up?

 

[Julian98]

have you checked to see if your CPU isn't overheating. if you have enough time before it turn off you can sometimes get into the bios and it will be on the temps will be on the main screen but check to make sure the CPU isd installed right

the motherboard doesnt post or turn on, the fans spin for a second and switch off again

then there is nothing else you can try really then reinstalling all the parts or if you are able to try the PSU on another computer.

i have tried two psu a evga 500w and corsair 430w both dont boot the motherboard

 

[captaincharisma]

Sounds like the board doesn't have a BIOS version which supports your CPU. If it is version lower than 0501, it won't work.

Unfortunately, this theory is impossible to test without either a supported CPU (say, Core i3 2120) or a different mobo. Cannot even rule out the RAM stick, no matter the fact that there are no beeps.

is there a way to flash a bios without it booting up?

no, the motherboard needs to boot in order to do a BIOS update.. if this is really the problem you would need a supported CPU installed

 

[herrwizo]

is there a way to flash a bios without it booting up?

Not on this board, unfortunately. Only some high-end models provide this feature.

 

[Julian98]

Sounds like the board doesn't have a BIOS version which supports your CPU. If it is version lower than 0501, it won't work.

Unfortunately, this theory is impossible to test without either a supported CPU (say, Core i3 2120) or a different mobo. Cannot even rule out the RAM stick, no matter the fact that there are no beeps.

is there a way to flash a bios without it booting up?

no, the motherboard needs to boot in order to do a BIOS update.. if this is really the problem you would need a supported CPU installed

is there a way to flash a bios without it booting up?

Not on this board, unfortunately. Only some high-end models provide this feature.

ok thanks for trying i guess ill buy a new motherboard

 

[faalin]

The chipset is a B75 which is for a gen 2 cpu, you need to update the bios to accept the gen 3 cpu you have. If you can barrow a Gen 2 cpu from anyone just to flash the bios then return it. The easiest way would be to just breadboard it outside the case to flash it.

 

[Julian98]

The chipset is a B75 which is for a gen 2 cpu, you need to update the bios to accept the gen 3 cpu you have. If you can barrow a Gen 2 cpu from anyone just to flash the bios then return it. The easiest way would be to just breadboard it outside the case to flash it.

thanks for the help but i dont know anyone who has a gen 2 :/

 

[captaincharisma]

The chipset is a B75 which is for a gen 2 cpu, you need to update the bios to accept the gen 3 cpu you have. If you can barrow a Gen 2 cpu from anyone just to flash the bios then return it. The easiest way would be to just breadboard it outside the case to flash it.

thanks for the help but i dont know anyone who has a gen 2 :/

then the 2 only options you would have are bringing it to a local PC shop to troubleshoot or try to find a cheap gen 2 celeron or Pentium CPU.