Can the case cause it all to fail?

Tromos

Junior Member
Apr 25, 2003
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Greetings. I, like many PC geeks, like to browse anandtech and use it as a reference. This is, however, my first attempted post so please bear with me.

I bought the various parts for a new system:

AMD XP 1800+ Retail Box (.13 micron)
MSI KT3V Motherboard
512MB PC2700 Apacer RAM

While new hardware is always good (I know that processor is hardly "new", but it beats the 800mhz Duron I'm running now), much of the point on this one was to put together a cool-looking beast. So I bought a new case, some cool case fans, a ThermalTake 9 with the coolmod top, a CCFL kit, etc.

I put it together, and while everything has power, I'm getting no life. No beeping from the board. No video signal. The fans are whirring and the lights are glowing, but the PC itself is doing nothing.

First thought: Bad processor. I put in another processor. Same result. I try a third. Same again. I try all three processors in a currently working system and they all work fine. Hmmm.

Second thought: Bad motherboard. I put in another motherboard. Same result. I try a third, same again. All three motherboards work fine in a different case. I tried leaving the motherboard out of the case (propped on a cardboard box), not touching the case in any way. Same deal.

Third thought: Bad memory. I remove the memory and fire up a known good motherboard with nothing on it - just the power supply plugged in and the power switch attached. Same result. Power to the board but no life. At the minimum I would expect a nice, long, complaining beep from the board.

Fourth thought: Bad power supply. So I order a new Powmax 400W supply and put it in. Same result.

The only thing common to all of these failures is the case itself. All of the parts work fine in a different case, even the power supply. I'm so confused!!! Any ideas? Is there any way that the case itself, even when the mobo isn't mounted, could be causing this issue? This is counter-intuitive to everything I've learned about PC building.

Here's the case: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3407820966&category=undefined

It came with a Powmax 400W PS. Thanks.
 

SexyK

Golden Member
Jul 30, 2001
1,343
4
76
Sounds like you could be shorting out the system. Make sure you have the motherboard standoffs in the appropriate places on the motherboard tray. Also make sure any screws you have attaching the motherboard to the tray are not overlapping onto the board itself. try running the same setup outside the case (like, on a desk or something) and see if it boots up. Be mindful of static while its outside the box, as it wont be grounded at all.
 

Tromos

Junior Member
Apr 25, 2003
20
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Originally posted by: Tromos
Second thought: Bad motherboard. I put in another motherboard. Same result. I try a third, same again. All three motherboards work fine in a different case. I tried leaving the motherboard out of the case (propped on a cardboard box), not touching the case in any way. Same deal.

Thank you for the quick response. Tried that already.

Is there anyplace else something might be shorting out that doesn't relate to the mobo itself? The power switch perhaps? If it was shorting out there, would it still be feeding power to the board just fine?
 

WarCon

Diamond Member
Feb 27, 2001
3,920
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Are you using a common video card? If not, have you tried a different fan plugged into the cpu fan header on the motherboards. Maybe its a bad fan sensor in the heatsink your using.

All I can think of and I don't think your case could possibly be the problem unless the wires on your power supply are bare and touching the case and shorting.
 

bozo1

Diamond Member
May 21, 2001
6,364
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Simply try using the motherboard OUTSIDE of the case to rule it out as being the problem.
 

WarCon

Diamond Member
Feb 27, 2001
3,920
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Second thought: Bad motherboard. I put in another motherboard. Same result. I try a third, same again. All three motherboards work fine in a different case. I tried leaving the motherboard out of the case (propped on a cardboard box), not touching the case in any way. Same deal.

He did already.
 

ElFenix

Elite Member
Super Moderator
Mar 20, 2000
102,395
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yep, something is wrong with the case. if its not a short i couldn't tell ya what it is though.
 

Tromos

Junior Member
Apr 25, 2003
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*sigh* It doesn't make any sense to me either.

SexyK: if the power switch wasn't connected right, it wouldn't turn on - at least I've never incorrectly attached the power switch and had it turn on in the past.

WarCon: I'm using (and be nice ;)) a fairly standard Asus VT8200 GF3 ti200. But even with a processor and memory and no vid card, I get no response. Yank the memory and leave the processor: nothing. It's like the lights are all on but nobody's home! As for shorting out on the PS, I've tried 2 different power supplies now with the same result. I suppose they could both have the exact same freaky error, but that seems unlikely.

Thank you all for your suggestions so far. I'll continue to take any advice I can get.

 

WarCon

Diamond Member
Feb 27, 2001
3,920
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But have you tried a different fan (doesn't have to be a CPU fan) plugged into the CPU fan header (in case your board has fan protection).
 

Tromos

Junior Member
Apr 25, 2003
20
0
0
Excellent question!

Unfortunately, the answer is yes :( At some point I realized my only 2 constants were the new case and the new HS/Fan. So I used the HS/Fan that came in the AMD retail box. Same deal. Then I tried another. Same again.

A colleague at work suggested I take the PS out of the case, hook it to the board (also out of the case), connect the power switch, and try it that way. Not sure it will help any, but I'll try. He said he's had one other instance where a broken weld inside the case had caused the RF energy from the parts to reverberate within the case instead of disbursing across the case materials and into the ground. Strange.

I'll try some more tonight. Further suggestions are always welcome.
 

ElFenix

Elite Member
Super Moderator
Mar 20, 2000
102,395
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to get it to power on you can just short the pins with a screwdriver, if ya didn't know
 

mastertech01

Moderator Emeritus Elite Member
Nov 13, 1999
11,875
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If any one of the power connectors is shorted or you have a shorted drive it will also cause no powerup.
 

Tromos

Junior Member
Apr 25, 2003
20
0
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Originally posted by: ElFenix
to get it to power on you can just short the pins with a screwdriver, if ya didn't know

Actually, I didn't know. My electronics skills aren't what they should be. *blush*

But the initial point is to further track down the culprit. If the only thing connected to the case and the mobo both is the power switch, then that tells me what part of the case is the problem.

Mastertech01: While I acknowledge your point (which I didn't know - so thank you), I can't imagine that I would have shortouts on 3 different mobos and 2 power supplies.
 

extro

Senior member
Jan 6, 2001
365
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Have you tried booting it up without a hard drive connected? I've had this happen with incorrect jumper settings or a bad cable.

How about trying it with both the motherboard and PS outside the case and nothing but a video card installed?
 

Coherence

Senior member
Jul 26, 2002
337
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My friend is having the same problem. I posted the same question here.. My friend is having the same problem with two different mobos, cases, everything is different. We're stumped. No POST beep, everything gets power, no video, no boot.
 

Coherence

Senior member
Jul 26, 2002
337
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In my thread describing the same problem, people have suggested a cracked core. But since you are having the same issue, and the CPU is working in other systems, I'm going to assume my friend didn't crack 2 CPU's when he tried.

It sounds like exactly the same problem you are having. If your CPUs are working fine in other systems, I'm going to assume his would, too.