Voltage error, no boot or post, CPU LED on

Toggle sidebar Toggle sidebar
D

delliejonut

Commendable
Jan 30, 2017
14
0
1,510
Specs-
Motherboard- ASUS prime z270-a
PSU- EVGA nex650g
CPU- i7700k

I booted up my pc for the first time and was in BIOS looking at settings. I saw CPU overclock and (stupidly) turned it on with the correct options for my cooling system. It increased voltage by 15%. I got a restart prompt, did so, and was greeted with a over-voltage error. The screen went to BIOS for a moment and then shut down.

Restarted it again, cpu led and dram led flash in sequence and then nothing, no beep no boot. I reset the bios by removing the battery. Now when I start up, the cpu led flashes once then stays lit.The fans and leds all work, everything seems to be fine but won't even boot to bios. I reseated the cpu but still nothing. I also breadboarded my motherboard, redid all connections. Tried moving my ram around.
 
Sort by date Sort by votes
burnhamjs

burnhamjs

Commendable
Jan 19, 2017
178
1
1,710
Did you unplug your computer when you removed the CMOS battery? How long did you remove it for? I thought that mobo had a CLEAR CMOS jumper. If so, unplug and short the CMOS jumper.

 
Upvote 0 Downvote
D

delliejonut

Commendable
Jan 30, 2017
14
0
1,510


I first removed the battery for a few minutes, then replaced it and jumped it, left it jumped for about 10 minutes, then removed the battery and left it jumped for almost an hour. Was unplugged during all of this. Tried restarting it in between each step but nothing changed.
 
Upvote 0 Downvote
burnhamjs

burnhamjs

Commendable
Jan 19, 2017
178
1
1,710
Unfortunately everything else points to a hardware issue. Hopefully somebody else can weigh in on this.

 
Upvote 0 Downvote
D

delliejonut

Commendable
Jan 30, 2017
14
0
1,510
I should mention right after the restart it flashed the bios screen, the cpu temp read 91c, then crashed.

I was afraid of a hardware issue. Is it likely the mobo or cpu got fried?
 
Upvote 0 Downvote
burnhamjs

burnhamjs

Commendable
Jan 19, 2017
178
1
1,710
i wouldn't wager a guess.

 
Upvote 0 Downvote
burnhamjs

burnhamjs

Commendable
Jan 19, 2017
178
1
1,710
i wouldn't wager a guess.

 
Upvote 0 Downvote
burnhamjs

burnhamjs

Commendable
Jan 19, 2017
178
1
1,710
How did you jump the cmos battery? You should have two pins called "CLEAR CMOS". You simply unplug the PC and jump these two pins (i use a flat blade screwdriver).

A bit of a long shot but worth a try - have you tried to remove the GPU and run off the internal GPU? Probably worth trying.

You mention that "it flashed the bios screen, the cpu temp read 91c, then crashed." I don't know the order of operations nor do I have a schematic but if this is a hardware issue, I wonder if you fried a cap in the VRM on the mobo. Don't replace the mobo on this guess, but if you can't rectify by clearing CMOS, or by moving RAM (did you try 1 stick?), or my removing the GPU, then the next thing that comes to my mind is the VRM on the mobo.

 
Upvote 0 Downvote
D

delliejonut

Commendable
Jan 30, 2017
14
0
1,510


I tried all of your suggestions, and I jumped the two pins with a jumper cap. If the VRM is shot do I need a whole new motherboard? It's still within the return window for Amazon, I'm thinking about sending it off anyway just to avoid a lot of head scratching.
 
Upvote 0 Downvote
burnhamjs

burnhamjs

Commendable
Jan 19, 2017
178
1
1,710
well, if you tried removing the GPU and still have the issue, then I cannot think of anything else. Maybe somebody else has something. Yes, if the VRM is fried you need a new mobo.

It's hard to troubleshoot via a forum thread, so don't do it based solely on my attempt to assist.

FYI - I have 30+ years of troubleshooting electronics, but even with all the tools and schematics available sometimes I don't identify the bad part correctly the first time...

 
Upvote 0 Downvote
D

delliejonut

Commendable
Jan 30, 2017
14
0
1,510


I appreciate your help anyway. Amazon has replacement for non working components at no charge and two day shipping, so I'm going to take advantage of that. I'll post back here in two days if my new mobo still doesn't work.
 
Upvote 0 Downvote
burnhamjs

burnhamjs

Commendable
Jan 19, 2017
178
1
1,710
Good luck :) Sorry we weren't able to find an easier solution.

I still don't know what happened with your overclock. Can you give a bit more detail just so we can make sure it doesn't happen again. You should have been able to OC this without issue.

 
Upvote 0 Downvote
D

delliejonut

Commendable
Jan 30, 2017
14
0
1,510
I have one more quick question-

If it turns out that the VRM fried (I have a month to return the mobo so I'm going to get it checked) does that mean that I got a faulty board out that the chipset just can't handle overclocking? It was an Asus prime z270-a, well reviewed on pc parts picker. I probably don't need overclocking but I'm just wondering if I'd still have the option.
 
Upvote 0 Downvote
burnhamjs

burnhamjs

Commendable
Jan 19, 2017
178
1
1,710
That mobo should be perfectly fine for OC'ing. I don't understand what method you used to attempt the OC. Personally, on a new build I would have run for a while, making sure all updates were completed and the system was stable, before I attempted an OC.

What specific setting did you apply in BIOS? Trying to identify if it was a bad board, or if you applied something you shouldn’t have. Most BIOS have a certain amount of safety thresholds, but I’m not sure what settings you changed.
 
Upvote 0 Downvote
D

delliejonut

Commendable
Jan 30, 2017
14
0
1,510
My motherboard has something in the bios called EZ TUNE. One of the functions is EZ overclock. It asks what type of cpu cooler you have and then picks an appropriate level of overclock for it. I was just going through the bios settings and I turned it on before I finished setting up or updating.
 
Upvote 0 Downvote
burnhamjs

burnhamjs

Commendable
Jan 19, 2017
178
1
1,710
hmm, interesting. That doesn't seem like it would have caused the issue unless the mobo had an issue.

 
Upvote 0 Downvote
D

delliejonut

Commendable
Jan 30, 2017
14
0
1,510


Update: received the new mobo, installed it, still have that little red light. No boot, no post. I think I'm going to try replacing the cpu next, unless it could be the pcu? I think it's possible I fried my i7, but I'm not sure.
 
Upvote 0 Downvote
popatim

popatim

Titan
Moderator
Dec 2, 2009
38,904
980
135,890
MERGED QUESTION
Question from delliejonut : "Over voltage error, no boot, CPU LED on"



 
Upvote 0 Downvote
popatim

popatim

Titan
Moderator
Dec 2, 2009
38,904
980
135,890
MERGED QUESTION
Question from delliejonut : "Over voltage error, CPU LED on constantly, won't boot"



 
Upvote 0 Downvote
J

John_1983

Prominent
Apr 29, 2017
1
0
510
I had this issue with a brand new motherboard Asus Maximus Extreme IX. The problem was the bios with mine, I had to actually do a re flash and it fixed it. My problem was identical to yours. Once I ref lashed the bios using an external usb it booted fine. Good luck.
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom