MB led turning on but system wont turn on. Help please!

Toggle sidebar Toggle sidebar
NovaTronMC

NovaTronMC

Distinguished
Aug 2, 2014
433
2
18,795
I got a new case, so i changed all my system (Intel core i7 4820k, Asus P9x79, G.Skill Ripjaws X, Msi GTX 970 and 2 ssds) from a Coolee Master HAF X to a NZXT S340, when i was done moving the hardware, i tried to turn on the pc and nothing, the only thing that turns on are the mobo leds. I checked everything was correctly connected and it was. Please help!
 
Solution
miggtt699

Try this: Take the motherboard out of the case and just plug in the essentials like one RAM stick, graphics card (no hdd/ssd needed). See if it boots, that is a sure way to isolate the issue to the components and not a short in the case or something of said nature.

To reset...
Sort by date Sort by votes
miggtt699

miggtt699

Distinguished
Aug 31, 2012
793
0
19,560
I have a P9X79, follow the red LEDs, its a self diagnosing tool, if one LED stays lit it means there's something wrong, or if it stays on for a lot longer than the other ones, take note of what that LED makes part of. Come back to me with said information if you can.
 
Upvote 0 Downvote
NovaTronMC

NovaTronMC

Distinguished
Aug 2, 2014
433
2
18,795


Only the green bottom led turns on, the one that says SB_PWR, all the other leds remain turned off. I already tested 2 PSU's and still only one led, the case power button works great, so Im thinking the CPU is dead, but how can I see that?
 
Upvote 0 Downvote
miggtt699

miggtt699

Distinguished
Aug 31, 2012
793
0
19,560


If there are no LEDs, you might have a dead motherboard, as when its a dead CPU, the CPU LED should stay lit.
 
Upvote 0 Downvote
NovaTronMC

NovaTronMC

Distinguished
Aug 2, 2014
433
2
18,795


The cpu led doesnt light up, while the power on the mobo does. But the cpu looks fine, and has been used for 3 years
 
Upvote 0 Downvote
miggtt699

miggtt699

Distinguished
Aug 31, 2012
793
0
19,560
Any other options you could try would be clearing the CMOS (Bios reset via hardware), only using one RAM stick and trying it on different RAM slots to see if that helps of anything, you could retry making sure all the connections are made correctly from the PSU to the motherboard and you could also try resitting the CPU.
 
Upvote 0 Downvote
NovaTronMC

NovaTronMC

Distinguished
Aug 2, 2014
433
2
18,795


Im sure the psu connections are good, I already resitted the CPU, but I will try the RAM slot change, and how do i do the CMOS clear?
 
Upvote 0 Downvote
miggtt699

miggtt699

Distinguished
Aug 31, 2012
793
0
19,560

Try this: Take the motherboard out of the case and just plug in the essentials like one RAM stick, graphics card (no hdd/ssd needed). See if it boots, that is a sure way to isolate the issue to the components and not a short in the case or something of said nature.

To reset the CMOS on a P9X79 you simply following this guide: https://www.manualslib.com/manual/414948/Asus-P9x79-Le.html?page=39
 
Upvote 0 Downvote
Solution
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom