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Need Help! Trouble building computer - UPDATE

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January 11, 2002 12:59:40 AM

Ok, Im building a computer for the first time and have been having lots of trouble.
Heres what Im working with so far:

Epox 8k7a+ Main board
AMD XP 1500 (1.33 Ghz)
128 MB PC2100 DDR Memory
Antec 350 watt power supply

Im only giving those components because the problem is somewhere in there.

Whats Happening:

I try to turn the computer on and sometimes I get no power at all. Other times all of the fans and lights come on, but the monitor is not getting any signal.

At the moment, I cant even get the fans and things to come on.

I dont think it is the power supply because this is the second one Ive tried and am having the same problem (unless I havent adjusted something on the power supply right).

Things I have questions about that might be part of the problem

* Do I need to make an adjustment to the VCore Jumper? Right now its just on default. I havent been able to find any good info on how to adjust it.

* The cables that connect the front panel of the computer (the on/off switch, harddrive lights, etc.) are differnt from my Compaq computer. On the Compaq it is just one bunch of cables that you connect to the motherboard. With the new case, the cables are all seperate. I think I have them all hooked up right, but the LED lights arent coming on in front. Also I dont have a cable labled Power on, but there is one that is labled "DC Sw". I assume that is the power switch. There is also place for "IR Connector" but I cant for the life of me figure out what they are for. The instruction manual with the motherboard isnt very helpful.

Please give any help you can. Im not a hardware genius, but have done alot of computer upgrading and have been researching for some time. Am very frustrated and discouraged right now too.

Thanks for any help you can provide.


UPDATE:

Ok, I have an update.

After monkeying around with the computer all night, Ive found that if I unplug the power supply connector to the motherboard and plug it back in, I get a brief flash of light from the LEDs and fans and then it no power at all. If I unplug the power supply connector to the motherboard and plug it right back in, does the same thing. If I dont unplug it and put it back in, it just stays dead.

Now, when I remove the CPU, and do the same as above, fan and lights will stay running and the POST LED has code FF which my manual tells me means "Boot Attempt" (but of course it wont boot because theres no CPU in). But if I put the CPU back in, I go back to the same thing as was happening above.

Does this mean the CPU is fried? Or is there some safeguard that is shutting the power off so it doesnt fry something?

When putting the arctic silver thermal paste on before the heatsink I put a little too much on and it smeared on the gold cache. Could this be part of the problem?

Any help would be greatly appreciated.<P ID="edit"><FONT SIZE=-1><EM>Edited by Enix on 01/11/02 11:13 AM.</EM></FONT></P>
January 11, 2002 6:48:17 AM

well, in the motherboard manual, you should be able to find out information about how to connect the leds and switches.
the cables coming off the front of the case should be labeled.
sometimes, if the switches are not connected correctly, you will have problems powering on the system.
also, the manual should have something about how to set up the cpu.
if the manual says nothing about how to do this stuff, then something is seriously wrong with the manual.
an epox mobo usually comes with a manual that will say how to do this stuff...they arent that bad about their manuals...sometimes they have crappy english...but they have ok manuals.
maybe they have made the manuals better since i last bought one in 98...
sorry i cant really help you too much...but usually the manual will give some pretty good information...unless you got the motherboard with no manaul...

-DAvid

-Live, Learn, then build your own computer!-
January 11, 2002 3:46:35 PM

UPDATE:

Ok, I have an update.

After monkeying around with the computer all night, Ive found that if I unplug the power supply connector to the motherboard and plug it back in, I get a brief flash of light from the LEDs and fans and then it no power at all. If I unplug the power supply connector to the motherboard and plug it right back in, does the same thing. If I dont unplug it and put it back in, it just stays dead.

Now, when I remove the CPU, and do the same as above, fan and lights will stay running and the POST LED has code FF which my manual tells me means "Boot Attempt" (but of course it wont boot because theres no CPU in). But if I put the CPU back in, I go back to the same thing as was happening above.

Does this mean the CPU is fried? Or is there some safeguard that is shutting the power off so it doesnt fry something?

When putting the arctic silver thermal paste on before the heatsink I put a little too much on and it smeared on the gold cache. Could this be part of the problem?

Any help would be greatly appreciated.
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Anonymous
a b V Motherboard
January 11, 2002 4:19:15 PM

I am also running into a similar problem with my new Asus A7n266. I bought two of them, one put in a new Antec SX635 case, which didn't have a problem (besides my usb lockup problem in another post), but the second board I placed in my old ATX case.

It does the same thing where the LED's flash briefly, the fans kick just a tad, but it never really boots. I too have tried multiple power supplies, to no avail, so this can't be the problem. I didn't do anything special to my processor, so it isn't the problem.

I _have_ gotten it to run though. Theorizing that it was a grounding problem, meaning some part of my motherboard is grounding incorrectly on its mounts, I unscrewed it completely and jiggled it a bit until I got it to boot. Then I screwed it all back in, testing it with each component to make sure it was still going to work. It worked fine long enough for me to get all the software installed, etc. But the next day it wouldn't start again.

So, I am really not sure what the problem is. In your case, it could be your processor is shorting (I really have no experience in that area). You could try remounting the motherboard. A friend of mine suggested placing felt on the mounts, and then physically grounding it to the case with a seperate wire attached to one of the screw mounts, might try that tonight.
Anonymous
a b V Motherboard
January 11, 2002 10:59:33 PM

Well i'll be damned, i've got the exact same problem with my asus a7a266. IO haven't tried unplugging the power cable for the motherboard yet, I don't want to damage it. But i'm the same way, no fans or nothing comes on but a light on the motherboard when i hit the power in the back, and the power in the front does nothing. No fans come on.

My parents warned me to wear earplugs when shooting a rifle, but never using my computer.
January 12, 2002 1:16:53 AM

Sounds like you have a grounding problem. Check those motherboard standoffs and make sure you have mounted them in the proper holes.

I want to die like my Grandfather...in my sleep...not screaming in terror like his passengers.
January 12, 2002 1:34:29 PM

Ive actually pulled the motherboard completely out of the case and held it in my hand to test to make sure it wasnt grounding.

Still had the same problem with the CPU installed.
January 12, 2002 7:15:33 PM

held it in your hand? when it was on?
you do know it isnt a good idea to be touching the motherboard or the components while it is on....
if you are making sure that the motherboard is not grounding, you should put it on a piece of cardboard.
something you can check is if you have a speed monitoring fan, plug it into the cpu header. some motherboards will not power on without a speed monitoring fan plugged in the cpu fan header. it is a safety feature to protect the cpu.
also, when you turn it on, does the ehatsink get warm?
if it is getting warm, then the cpu is being powered on.
if it is not warm, then it is not getting power...and something is going on...like the protection feature, or a short somewhere...

-DAvid

-Live, Learn, then build your own computer!-
January 12, 2002 8:04:32 PM

HonestJhon

Quote:
when you turn it on, does the ehatsink get warm?

I assume thats heatsink? With the CPU plugged in it loses all power a half second after flipping the switch. Turns all fans and lights off. The only way to get fans and LEDs to run is to pull the CPU out of the socket. Then all fans and lights will stay running.

As for the CPU Fan, Im using a Thermaltake Volcano II and again, without the CPU in the socket, it will run (have tried it just to test it out. But with the CPU in there, no good. Shuts the whole thing down.
Anonymous
a b V Motherboard
January 14, 2002 12:27:54 PM

Okay, I solved my problem. It was, as I suspected, a grounding problem. I solved it by completely removing my motherboard and placing two layers of scotch tape over each mount. Poke a hole in the center of the tape on the mounts so you can easily get your screws back in there.
I also placed a line of tape along the bottom edge of the rear of the case (where all the connectors push through the back of the case), just in case one of my ports or a part of the motherboard was grounding there.
Then I put everything back on and it has worked fine ever since.
January 14, 2002 7:02:32 PM

yeah, that was heatsink..lol..sorry.
but hmmm...
might be a dead processor.
or there are jumpers on the motherboard for the voltage that are set wrong.
i dunno....
inspect the cpu for physical damage.
like look at the core, and if it looks like there is a chip in it, then that could be the problem right there.
but really look at it, because there can be hairline fractures through it...causing failure.
or it may have been electrostatically shocked, and killed.
this is starting to sound like a dead processor.
do you have another one to try out?

-DAvid

-Live, Learn, then build your own computer!-
!