Help! Newly built PC powers off after 2 seconds!

fitzguam

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I just built my first computer from scratch, using this barebones kit from Tiger:

http://www.tigerdirect.com/applica [...] &CatId=333

PNY GeForce 7150 GPU Motherboard
Intel Pentium DC E2200 2.20GHz
Corsair TWINX 2048MB PC6400
XFX GeForce 9600 GSO Video Card
Power Up Mid-T w/450-Watt PSU

Everything went together logically enough. When I applied power though, the front LED illuminated,
the CPU and Case fans spun up, and I was feeling rather pleased with myself -- for about two seconds,
then everything went dark.

Here's where I am on troubleshooting:

1) I THOUGHT the thin coat of some sort of grease which the CPU had on it when it arrived was adequate.
Various people and several websites said no, so I'll get cleaner and thermal paste on the way home.
It seems amazing to me that the lack of paste could be detected and cause a shutdown so quickly, but what do I know? CAN it?

2) I disconnected everything except the fans and RAM, tried again, same result. I even disconnected
everything from the case front to check for a bad power switch, jumped the start terminals with a
screwdriver, same result.

3) Belatedly, I checked the reviews from Tiger not just on the system, but on the case itself. Several
people said their Power Supply was Dead On Arrival, but did not elaborate. Could a failing PS allow the
fans to spin up, run out of amperage, and shut everything down?

I did install the MoBo on standoffs, so do not believe it's grounding against the case anywhere.

I am open to any and all trouble shooting ideas, but would rather not rush out to replace brand new
components until I know what's at fault.

Thanks in advance to all who offer help,

Kelly Fitz
Guam, USA
 
First impression is a short. There are certain holes on the mobo for the mounts, and there are also holes that aren't supposed to be used. You should check that all the mounts are where they are supposed to be.

Secondly, you should try to wiggle the cpu fan/heatsink. If it moves at all, you may have an overheating issue w/ the cpu.
 

fitzguam

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No, the mounting holes are clearly marked (with a sort of cross-hatched green circle) and I used only those holes.

CPU and Heatsink/fan are very secure, but I will clean up and re-grease tonight just in case.

I have also purchased a new PSU, as several sites have mentioned similar problems caused by a bad one, and
I have found reports of this case shipping with a dead or semi-dead power supply.

Will post results soon.

Thanks,

Kelly
 

fitzguam

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Sure did. I'm hoping the PSU that came with the case was bad, as
some other buyers have indicated theirs were. I'm already learning some
valuable lessons about under-researched, bargain basement parts.

 

cmichael138

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Unfortunately, many builders try to save money when it comes to the PSU. Some cheap ones can take out other parts when they go. Hope your new one solves the problem....let us know how it goes.
 
When people think about building a new pc, people seem to want to get cutting edge hardware. But when they see the price, they want to cut back somewhere. Unfortunately the psu is the common target. The psu touches almost everything in the pc. If it blows, it can take anything with it and be very costly.

I've done it myself. My first build I made that mistake. Never again....
 

fitzguam

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Well, kids, we're having fun now!

Still no power up. I have:

Installed a new PSU. Cleaned and (very lightly) re-greased the CPU and re-mounted the heatsink/fan.

Placed the MoBo on a cardboard sheet in case it was grounding against the case.

Connected ONLY the 4 pin ATX connector (the squarish plug, right?), the CPU and case fans, the CPU communication (18 pin) plug, and one stick of RAM.

Jumped the start switch terminals, and got 2 seconds of spinning fans followed by silence and darkness (sigh).

Replaced the RAM with a different stick. Same result.

What do you think guys? Am I another victim of a DOA PNY MoBo?

Now, since I bought this system (it took a month to get here) other buyers have reported dead PSUs AND dead MoBos on arrival. Had I seen those reviews, obviously I'd have bought a different kit.

I'm fairly mechanically and electrically adept, so figured snapping together a lower end computer kit would be no trouble. So far I am simply very frustrated (although fascinated, in a sick, twisted way, with the learning process).

Even my son is beginning, I fear, to doubt the godlike qualities of his Dad.
Old Dad is beginning to wish he'd bought a POS HP from the Navy Exchange.

Help! All the assistance you good people have rendered so far is much appreciated, but if I don't make this thing at LEAST get to the POST tests soon I'm gonna need a rubber room.

Thanks, again,

Kelly
Guam, USA



 

kubes

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My suggestion might take a bit of work but it'll help eliminate a bunch of problems.

1) Take your motherboard completely out of your case. Place it on a peice of carboard on a table or whatever.

2) Hook up the PSU to the Motherboard (both the 20pin and 4/8 pin connector).

3) Insert the CPU and heatsink. Make sure the heat sink's fan is connected. to the motherboard. Some people forget to plug in this and some motherboards won't allow bootup if there is no active fan cooling the cpu.

4) Put in a single stick of ram in slot 0.

5) Insert your vidoe card (I don't believe off the top of my head that 9600 has any power adapaters -sorry being lazy this morning to double check.)

5) Now the question is how to turn this guy on. In your MB manual read the documentation of where the case's plugs go. Find where the power switch is. Use a screw driver or paper clip to "short" the two pins. Just need to make contact for a breif moment and it should fire up. Lets see if that gets you up and running. Please report back with your results. Can't have the son losing faith in good old dad now.
 
It's not a mobo short as the OP has already tried booting outside the case.

Try tying up all the extra wires, to make sure you don't have any exposed wires touching the case.

When you get the flash of power through the system, are you using the front panel switch, or is when you plug the cord into the psu? I've seen bursts of power through the system when plugging in the power cord, even when the switch on the psu is OFF. It may be a dumb suggestion, but is the psu power switch on?

Do you have the front panel wiring on the right pins? You may have switched the power and reset wiring.
 

fitzguam

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kubes,

What you suggest here is precisely what I did last night (and described above), with the exception that I did not install the video card, as the MoBo also features on-board graphics, so that was one less accessory to troubleshoot.

1) Card was out of box, on a cardboard sheet, connected ONLY to power supply and both fans.

2) Installed one RAM stick.

3) Shorted "start" pins wit a screwdriver.

4) Fans powered up for a couple seconds, everything powered down.

5) Replaced RAM stick with another one, in case RAM was shorted or bad. Same result.

6) Back to "AAAaaaarrrrgh!".

Any other ideas?

Kelly






 

fitzguam

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All wires were secured, and the box was not connected in any way (except PSU to MoBo).

As described above, nothing was connected except the fans and 1 RAM stick, which
I swapped out for another one after the first failure.

I started it (for the 2 seconds or so it ran) by shorting the "start" button pins. None of the
front panel stuff was connected, so the front panel wiring is not a factor, and neither is the switch.

Yep, PSU swith is "on", and cord is plugged into wall. I had to chuckle when I read that, because
I am ALWAYS going on about checking easy stuff first when working on cars, boats or planes.
Guess we have to apply the same to computers! (grin).

I'm stumped as to what else it could be except the MoBo or chip . . .

Luckily my son is treating it all as a learning experience and taking it with (relatively) good humor
and patience, but *I* am getting frustrated . . .

Kelly







 

johnnyq1233

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You might have a bad mobo....That's the only other thing I can think of.
Also, do you have a friend that has a similar lg775 mobo to test the cpu on?
That would eliminate that component and you could probably test the ram on your friends board as well.
If those all pass then send back the board it's most likely D.O.A.
Hope this helps!
 

fitzguam

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I think we're probably down to bad MoBo or Processor as well (any other ideas?
Anyone?).

I'll check with our SysAdmin at school (I teach science here on Guam) as to
whether we have any machines with a compatible socket 775 and RAM, good idea.

My other PC is a dinosaur and would be of no help. If in fact the board is dead,
does anyone have a recommendation for a good (read: reliable) budget board?

I'd rather pay for a replacement than go through all this again, and one other
customer (again, writing his review AFTER I bought this system) claims he got
one Mobo DOA with the barebones kit AND a dead replacement from PNY!

It's too bad, I've had good luck with their memory products, so the MoBo issue
is disappointing.

Kelly
 
Bad or incompatible ram could cause such a problem.
But---Corsair is a good brand, and I doubt that you would get two bad sticks.
Since the ram was sold as a package, I would hope that it was compatible.

One thing to try is to reset the cmos to make certain that you are at the default values which should work.

I still can't help but wonder if you got sent a return which was defective, based on finding material on the cpu which should never have been there.

Intel, Asus, and Gigabyte would be my three picks for a reliable motherboard, using intel chips. You should be able to get one for about $50.
Keep the cpu and ram, which are probably good.

 

fitzguam

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OK, I'm a computer rookie (except as a user).

Is it somehow possible to reset CMOS to defaults on a computer that won't power up?

By the way, this forum is wonderful, as are the many friendly and helpful folks who are on it.


Thanks again,

Kelly





, I'm a computer rookie (except as an internet user
 
Read the mobo instruction manual. If you did not get one in your kit, download it from the pny web site. I think there are some jumpers that you switch to reset the cmos. Removing the battery from the mobo for a few minutes should also work. While you are at it, go through the whole manual looking for something that might have been missed.

Does the mobo have any lights, lcd indicators or such which may indicate the problem?

Can you attach a speaker? Some mobo problems give sounds to identify the problem.
 

fitzguam

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The MoBo came with basically no documentation, and the manual on the
website is less than helpful (doesn't even show the same configuration as
the one I got). It's another reason I'm inclined to go with a more reputable
manufacturer rather than waiting for a warranty replacement.
I'll have another look, though.

Thanks,

Kelly

 


I think you should cut your losses, and send the kit back.
No doubt you can get a better list of parts from these forum members.
 

fitzguam

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Not a bad idea. I'll have to explore what options I have in terms of return policy with Tiger Direct. Meantime, my school's SysAdmin just confirmed that we have some machines I can swap my RAM and Processor into to make sure they're OK . . .



 

johnnyq1233

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Fitz...if it came with no documentation then you're the victim of a re-send....They take a board that they don't want to test but believe it's ok and send it back out so the poor customer can verify that it is indeed dead!
I personally don't pay for something I can't touch or hold in my hand...ratings or no ratings.
I believe that if I give you 200.00 that you in turn give me a product in hand and if that product doesn't work I'll be knocking your door down for one that does!
Think of buying a product with a cheque, if the cheque bounces they're not gonna look at if the ink is bad or the paper is faulty. They're gonna come after your ass and demand the money! and possibly press charges!
Treat this as the same!
Hope this helps!
 

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