Dead MB? ASUS Sabertooth Z77

[kroneixons]

Hello everyone, im looking for some advice here, my new computer was working well for the past 2 weeks, it was installed inside my case but i was turning it on with a jumper because I didnt had the time to do the cable routing.

Yesterday i finally had the time and did it, after that i took my pc to another room and here starts the problem, i connected it to an outlet with no grounding, and it would turn on but i had no video. So i have 3 situations.

1. Outlet with no grounding
2. the 24pin cable was poorly connected after the routing
3. i connected the frontpanel usb and audio that i had not tested yet.

Those might be the cause of the trouble and here is what i did after:

1. Reconnected all cables
2. Checked CPU pins
3. Removed all components and added 1 by 1, I always get the check light for CPU and MEM but the boot_device led doesnt even turn on(i think all lights are supposed to blink at least once before post)
4. Reset BIOS
5. Changed MEM slots, changed sticks too
6. Changed VGA, also tried with no VGA thru onboard.

I can hear the SSD working and if i change for another HDD i can also hear it working

Doesnt matter what I do, my usb keyboard will always show the 3 lights (caps/num/scroll) as on and dont even blink then.


Can i assume it for a dead mother board?

I also tried booting my rig out on a cardboard with anti-static bag underneath.



Apreciate your help sorry for bad grammar / misstypes, im typing this in a hurry

 

[paul878]

Reset the bios again and take out the cmos battery.

I had similar issue like that when I first got the Gene-Z, seem the bios can't make up its mind which video output to use.

 

[denis280]

Just to make sure.is the monitor plug in??

 

[kroneixons]

Im removing the thermal armor now to take the battery, and yes, the monitor was plugged in, i tried thru the HD4000 HDMI, thru the 7970 HDMI, Display and DVI

And also tried the monitor with another pc and it was working

 

[kroneixons]

Removed the thermal armor and took out the battery, still no video, and the keyboard still doesnt seem to work even to its powered up

 

[paul878]

Motherboard AUX power connected?
At this point I only can suggest you re-seat everything and try to boot with minimum amount of hardware.

 

[kroneixons]

Everything connected, and i tried booting with no hardware, first stuck at CPU Led, then i added CPU, stuck at MEM Led, added 1 stick, then no other lights clues and the other components are all working (tested on my notebook, except VGA, but since i have 2, at least one of then is bound to work and none did the trick)

Im taking it back in tomorrow and will post results back.

Gotta g2sleep now

Thanks for the help guys.

 

[jaqie]

time for a test bench power up. take everything out of the case, put it on a static free non conductive area, build up the bare minimum parts to get it to show video (cpu, heatsink-fan, ram, power supply, monitor) and power it on. If it still doesnt power on, reseat the processor and try again. If it still doesnt, remove all but one ram stick and try with just one ram stick. If it still doesnt, you have a fried part.

 

[Puppies04]

How long did you take the CMOS out for? If it wasn't for 5-10 minutes then do it again and hold the case power and reset buttons for 30 secs (obviously with the machine unplugged from the wall).