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Tough One: No display, Automatically powers on when pluged in

post #1 of 18
Thread Starter 
I know this is Intel forum, and im USUALLY an Intel guy... Either way im hoping you guys can help out.... Ya'll havnt let me down yet, I ahve no confidence in those AMD folks! haha

OK so here’s a brief history:

This is used as an HTPC/Media Server in a cabinet and with newly integrated heatink and higher flowing exhaust fans I've been able to keep it around 35C. The machine is comprised of:

AMD A8-3850 APU
Asrock A75-HVS
G-Skill Sniper 2x4gb
OCZ ModXstream 500W
Uses integrated video

Before it was turned off this evening when i returned from work the machine was on and functioning without flaw the last 3+ days. Today I decided to try and reduce heat/power consumption by undervoltaging the CPU. Before adding the new cooling components I had undervoltages my CPU about .1V.. I read an article where someone was able to undervolt .275V and tried it.

On restart i was able to get to the BIOs but the keyboard would not work, i opened up reset CMOS (Battery/Header Pins) and now i have no display. My system is also powering up as soon as the PSU power switch is switched on.

So far I've tried the following:

Reset CMOS with Battery removal as well as mobo header pins » NO CHANGE
Unplugged everything but bare essentials » NO CHANGE
Reseated the CPU, checked for bent pins (not sure how they would've before bent in the socket, but hey) » NO CHANGE
Checked for a short to the case » NO CHANGE
Unplugged everything but bare essentials » NO CHANGE
Used trusty compressed air on board » NO CHANGE

Anyone got any suggestions??? It'll be GREATLY appreciated. And no i have no GPUs laying around at the moment... Unfortunately.
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post #2 of 18
So the keyboard works when you hit delete to get into bios but won't after it gets in?
post #3 of 18
Thread Starter 
Not anymore... I currently have no display and no POST beeps since CMOS reset.

I've eliminated the auto start when the PSU is switched on (O to I) without use of the power switch. Not real sure how... I tried resetting CMOS for the 20th time this time unplugging the VGA cable and viola... Strange... coincidence maybe..

Still no POST(no POST OK beep)/No display...
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post #4 of 18
no confidence in the amd folks? WOW.

should have gotten a higher quality motherboard. asus...

try the cpu in a different board. or try blind flashing the motherboard bios. not sure how to do it on an asrock tho...
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post #5 of 18
Do you have an extra video card lying around?If you do,try putting one in and see if it'll boot up using discrete GPU.Looked it up on the newegg reviews on that particular board and I've heard of problems with that board concerning the on-board video not outputting anything unless you have a GPU hooked up.Weird but give it a look.
post #6 of 18
I know you've reset the cmos, but did you completely drain the system of power before putting it back in and powering it up? Leave the cmos out, and power cord off for 5-10 minutes. Push the power button a few times while it's like that to make sure any caps are drained.

After about 10 minutes, put it back together and see what you get. If the bios isn't reset at that point, fun times lie ahead.
    
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post #7 of 18
Quote:
Originally Posted by W4LNUT5 View Post

If the bios isn't reset at that point, fun times lie ahead.

It's always more fun when you have a problem with your hardware isn't it tongue.gif ?
post #8 of 18
Thread Starter 
No extra AMD mobo/CPUs laying around to swap or compatible VGA cards.. Will try to get one from work today and test.

I did try to make sure I drained all power, I will try again after my little success (not auto powering on)
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post #9 of 18
Thread Starter 
Let me re-address all the comments in a more ordered manner!
Quote:
Originally Posted by ajslay View Post

no confidence in the amd folks? WOW.
should have gotten a higher quality motherboard. asus...
try the cpu in a different board. or try blind flashing the motherboard bios. not sure how to do it on an asrock tho...

-So far not a single comment in the AMD forums :-P haha, just a joke though, I'm sure they're very knowledgeable!
-I'm usually diehard EVGA, but I guess I went cheap for the HTPC... Guess that was a terrible idea!
-I do not have another compatible board or CPU, so unfortunately swapping is not an options.

Quote:
Originally Posted by bleachigo View Post

Do you have an extra video card lying around?If you do,try putting one in and see if it'll boot up using discrete GPU.Looked it up on the newegg reviews on that particular board and I've heard of problems with that board concerning the on-board video not outputting anything unless you have a GPU hooked up.Weird but give it a look.

I grabbed an extra card from work but all we had laying around was a Quadro workstation GPU, hahaha... It's a little overwhelming on my miniATX mobo! But i will be trying that after this post!

Quote:
Originally Posted by W4LNUT5 View Post

I know you've reset the cmos, but did you completely drain the system of power before putting it back in and powering it up? Leave the cmos out, and power cord off for 5-10 minutes. Push the power button a few times while it's like that to make sure any caps are drained.
After about 10 minutes, put it back together and see what you get. If the bios isn't reset at that point, fun times lie ahead.


Tried this prior to "fixing" the auto-power-on issue, Will try again!

Thanks for all the comments and suggestions!
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post #10 of 18
Thread Starter 
Auto power on, when i switch PSU on started again when I reset CMOS without unplugging VGA cable. Went ahead and reset with VGA cable unplugged and it's no longer starting on PSU switch On.

Tested with known good Quadra FX video card, but there may be compatibility issues... Also reseated CPU, no luck..

I can turn on with no RAM and not get any beaps... Any suggestions?
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Hard DriveOSMonitorKeyboard
Crucial C300 64gb, 2x f3 1tb 7 Ult 64bit DELL u2311h Ligitech MX5000 
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