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- Jan 24, 2022
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Here is another one for the forum. I have a nice little PC here (customer's PC) with an Asus Sabretooth Z97 Mark One motherboard. It won't boot....Well I say that it sort of does sometimes....
From a cold boot, the on button causes it to start up for 4 or 5 seconds fans spinning lights on the NZXT cooler on, then it power down.
Another push of the on button will start it up but nearly every time the CPU light will stay lit and it won't boot, no beeps, nothing on the screen. It just sits there fans going.
Occasionally it WILL actual POST, produce a beep and show the initial BIOS logo/screen with press F2 or DEL to enter setup. Pressing these keys will not get me into the BIOS, instead it then displays "BIOS is updating. "Do not shut down or reset the system to prevent system bootup failure"
This has happened twice, both times after I removed the CMOS battery for 10-15 mins and/or jumpered the clear CMOS jumper, it doesn't happen every time.
I have noticed it does sometimes go through a process of starting up...checking the RAM CPU Video and OS, LED's show this checking progress as they light and go out when booting. So it is doing stuff....
I have tried updating the BIOS, twice using the USB updating method, both times it looked like it worked with the BIOS updating LED flashing progressively faster then going out, as it's supposed to do, it looks like that worked too.
I have tried another CPU in it and tested it's RAM in another PC, the RAM is OK and the problem is the same with the other CPU.
I am out of ideas. Anybody got any ideas for me?
It's a shame as this is still quite a nice PC, the CPU is an i7 4790K 4.00Ghz CPU and its all in a very nice NZXT case with smart white power cables, in its day it would have been a dream machine, two SSD's as well....
I guess the good news is if I turn it off now, it won't be any worse that it is already.
Do the BIOS chips fail on this board? What might be going on here?
**Update, in the space of 20 mins since I typed this, I have reset it, it rebooted and went through a process of trying to boot, powering down checking the bits powering down powering up about 4 or 5 times then back to the "BIOS is updating. "Do not shut down or reset the system to prevent system bootup failure" again where it will sit until I reset/power off. The video card is working too eh?
From a cold boot, the on button causes it to start up for 4 or 5 seconds fans spinning lights on the NZXT cooler on, then it power down.
Another push of the on button will start it up but nearly every time the CPU light will stay lit and it won't boot, no beeps, nothing on the screen. It just sits there fans going.
Occasionally it WILL actual POST, produce a beep and show the initial BIOS logo/screen with press F2 or DEL to enter setup. Pressing these keys will not get me into the BIOS, instead it then displays "BIOS is updating. "Do not shut down or reset the system to prevent system bootup failure"
This has happened twice, both times after I removed the CMOS battery for 10-15 mins and/or jumpered the clear CMOS jumper, it doesn't happen every time.
I have noticed it does sometimes go through a process of starting up...checking the RAM CPU Video and OS, LED's show this checking progress as they light and go out when booting. So it is doing stuff....
I have tried updating the BIOS, twice using the USB updating method, both times it looked like it worked with the BIOS updating LED flashing progressively faster then going out, as it's supposed to do, it looks like that worked too.
I have tried another CPU in it and tested it's RAM in another PC, the RAM is OK and the problem is the same with the other CPU.
I am out of ideas. Anybody got any ideas for me?
It's a shame as this is still quite a nice PC, the CPU is an i7 4790K 4.00Ghz CPU and its all in a very nice NZXT case with smart white power cables, in its day it would have been a dream machine, two SSD's as well....
I guess the good news is if I turn it off now, it won't be any worse that it is already.
Do the BIOS chips fail on this board? What might be going on here?
**Update, in the space of 20 mins since I typed this, I have reset it, it rebooted and went through a process of trying to boot, powering down checking the bits powering down powering up about 4 or 5 times then back to the "BIOS is updating. "Do not shut down or reset the system to prevent system bootup failure" again where it will sit until I reset/power off. The video card is working too eh?
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