I'm having problems with a new build that I've put together, spec as follows;
Motherboard- Asus Z87-Pro
CPU- Intel i5-4670k @3.4GHz
RAM- 8Gb Crucial Ballistix Tactical DDR3 1600Mhz (2x4GB)
GPU- MSI Geforce GTX 660 gaming edition
SSD- Sandisk 128GB
O.S.- Windows 8.1
It POSTed fine to begin with outside the case and I installed windows, but after finishing the build it would not POST at all within the case, it would power up, begin to turn the fans, die, and then try again a few seconds later.
I've stripped it back out of the case and set it up on an antistatic mat, with just a single stick of RAM (in the preferred slot from the manual), the stock cooler, the VGA card and the SSD. I've also flashed the latest BIOS and reset the cmos, and everything is set to default in the BIOS.
At this point, one of two things happens when I try to power up the system;
1) The most common thing is that the system will hang during POST. It's given quite a few different Q-codes at this point, but the most common by far are 15 and 79.
I've been told that 15 is RAM related and 79 could be CPU, so I've tried 4 different sticks in both banks, and when I was refitting the stock cooler (the RAM is inaccessible under the heatsink I originally had attached) I checked out the cpu pins, there doesn't seem to be any problem there as far as I can see.
2) The system will otherwise boot into Windows, maybe once in every 5-10 attempts, but on all bar 3 occasions now, as soon as the system POSTs/ exits the BIOS, power to all of the USB ports seems to stop. There is full use of both when I'm using the BIOS, and there's never been any problem with either device on another machine. I've tried all of the slots on the board, plus tried connecting the 2.0 ports from the case to each of the boards connectors with the same problem each time.
One thing I have noticed is that if it boots into windows with "no power", if I un- and re-plug the mouse, the laser powers on, but in an "on for ~1sec, flickering for 1sec" sort of cycle, while doing the same with the keyboard gives a single flash from the NumLock LED. Neither device allows any input however.
This has got me completely stumped, and any help or suggestions anyone could give would be great.
Motherboard- Asus Z87-Pro
CPU- Intel i5-4670k @3.4GHz
RAM- 8Gb Crucial Ballistix Tactical DDR3 1600Mhz (2x4GB)
GPU- MSI Geforce GTX 660 gaming edition
SSD- Sandisk 128GB
O.S.- Windows 8.1
It POSTed fine to begin with outside the case and I installed windows, but after finishing the build it would not POST at all within the case, it would power up, begin to turn the fans, die, and then try again a few seconds later.
I've stripped it back out of the case and set it up on an antistatic mat, with just a single stick of RAM (in the preferred slot from the manual), the stock cooler, the VGA card and the SSD. I've also flashed the latest BIOS and reset the cmos, and everything is set to default in the BIOS.
At this point, one of two things happens when I try to power up the system;
1) The most common thing is that the system will hang during POST. It's given quite a few different Q-codes at this point, but the most common by far are 15 and 79.
I've been told that 15 is RAM related and 79 could be CPU, so I've tried 4 different sticks in both banks, and when I was refitting the stock cooler (the RAM is inaccessible under the heatsink I originally had attached) I checked out the cpu pins, there doesn't seem to be any problem there as far as I can see.
2) The system will otherwise boot into Windows, maybe once in every 5-10 attempts, but on all bar 3 occasions now, as soon as the system POSTs/ exits the BIOS, power to all of the USB ports seems to stop. There is full use of both when I'm using the BIOS, and there's never been any problem with either device on another machine. I've tried all of the slots on the board, plus tried connecting the 2.0 ports from the case to each of the boards connectors with the same problem each time.
One thing I have noticed is that if it boots into windows with "no power", if I un- and re-plug the mouse, the laser powers on, but in an "on for ~1sec, flickering for 1sec" sort of cycle, while doing the same with the keyboard gives a single flash from the NumLock LED. Neither device allows any input however.
This has got me completely stumped, and any help or suggestions anyone could give would be great.
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