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  Weird noise from Antec 350W PSU 
 
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Predator Dec 04, 2005, 12:02am EST Report Abuse
I had an Antec SL350 350W SmartPower PSU from my old computer. (before I got the Sonata case which came with the TruePower 380W)

This happened some time ago: I was playing around with the PSU, like letting it rest on the little place where you screw it in, since in my old case, there was a little ledge kind of thing that stuck out where the PSU could sit while you were screwing it in the back. Well, one day, the PSU fell from there onto the bottom of the case. I didn't think it was broken, but I tried it in another system and it didn't work. I thought maybe i had turned on one of its protection features (like once when it shut itself off so that i wouldnt be electrocuted)

I try it today in my old Dell Dimension XPS D333, and I plug it into the 24-pin connector of the mobo, that's all I plugged in. I switch the little On/Off switch of the PSU -> on. Plugged it into the wall. The PSU started, but the fan in the PSU didn't start. Like this weird screeching noise came out of the PSU...and nothing turned on...not even the fan in the PSU. This sound...it was like a low screeching noise....a bit enough to give you a headache after a while.

Can someone help me with what the problem is? Thanks.


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PCGEEK Dec 04, 2005, 12:14am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
thats easy cheap fix.

pop the top and replace the fan.

Sounds like you threw a bearing.

Max Steiner Dec 04, 2005, 12:22am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
Yup, I'd concur with GEEK. Threw a bearing or cracked the spindle or unseated a coil... something with the fan itself.

-----------------------~-------------------
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Shadow_Ops_Airman1 Dec 04, 2005, 05:13am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
make sure the psu is switched to proper voltage, as most psus come with 115 or 220 voltage select switch, another thing to do is buy another PSU. ALSO NEXT TIME YOU WONT DO SUCH A STUPID THING.

AMD Athlon XP-M 2500+ (133x14= 1867MHz) (209x11= 2299MHz)
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Antec SX800, Neo HE 500, 4 Antec 8CM Fans
Thermalright SI-97 1 Antec Tricool 12CM Fan
CL SB XFi Xtreme Music
2x Barracuda HDs (250/400)
2x Samsung Write
Fixer Dec 04, 2005, 06:00am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
Like the above has said about the bearings.
Was the PSU in a working computer or in an empty case when it fell?
The Dell Dimension XPS D333, was this its original PSU that your trying?

Predator Dec 04, 2005, 08:51am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
The PSU was in an empty case when it fell. The reason I am putting the Antec in the old Dell is because the PSU in the Dell broke.

But PCGEEK, if it was just the fan, then shouldn't the computer still turn on?

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PCGEEK Dec 04, 2005, 09:15am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
Antec put a fail safe into there PSU,s.

Fan fails then PSU wont turn on.

Predator Dec 04, 2005, 09:17am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
Hey PCGEEK, are you sure about that?

Because I'm not tooo keen into opening up my PSU. Also, what was that weird screeching noise??...

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Shadow_Ops_Airman1 Dec 04, 2005, 09:26am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
lots of work doing fan change outs etc.

AMD Athlon XP-M 2500+ (133x14= 1867MHz) (209x11= 2299MHz)
DFI LP NF2 Ultra-B (Hellfire 3EG Rev2)
Antec SX800, Neo HE 500, 4 Antec 8CM Fans
Thermalright SI-97 1 Antec Tricool 12CM Fan
CL SB XFi Xtreme Music
2x Barracuda HDs (250/400)
2x Samsung Write
Predator Dec 04, 2005, 10:11am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
How exactly do I perform this?

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Max Steiner Dec 04, 2005, 10:55am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
Option 1: Don't mess with it anymore, and contact Antec directly about a replacement. No need to mention that it was dropped... I would just say that it's ceased operation and emits a screeching sound, probably from a blown capacitor. They have a 3-year warranty on all their products, and can be contacted here:
http://www.antec.com/us/supportRMA.html
You might still have the proof-of-purchase, you might not. If you call the tech service department, though, and explain to them the basics (doesn't work, still sealed up with the warranty sticker on it, here's the serial # and product #), with at least a mention of where you got it from and approximately when, you will probably get issued an RMA.

Option 2: If it's beyond 3 years in your possession, and/or you don't want to explore Option 1, you can open up the PS by undoing 4 body screws and removing the upper cover. The innards of the PS will be right there in front of you. Depending on the model, there might be 1 or 2 80mm fans within the power supply itself. Again, depending on the model and batch they were doing, the fans might be directly soldered into the PS's distribution board... but Antec is a "good company", and I'm betting they used a 2-pin modular fan plug. All you need to do is remove the offending fan, locate a replacement of the same size and thickness, and then swap modular fan plugs. Most off-the-shelf fans have either that stupid 2-wire-to-4-wire-molex connector (stupidest thing ever made), or the 3-wire-to-modular-plug direct connector. You want the 3-wire version. You'll only be using 2-wires, so you need to get something thin and pointy, like a pin, paperclip, or tweezers, and depress each of the wire pins in the connector and pull the wire out to reveal the bare spring pins. You can roll up and tuck away the white (or yellow) wire. Now, note how the offending fan's wires go into the 2-wire fan connector, and then remove those. Take the now empty 2-wire connector, and put it on the new fan's spring pins. Put new fan into PS... done!

But, in pondering this further, it might not be the fan at all. But then again, it might be... just as PCGEEK has said... you'll have to check the fan before outright replacing it and closing up the PS.

Because, it might be something more insidious, like a busted solder on a capacitor. If the solder joint on a capacitor did in fact fracture, that means that power (and lots of it) isn't going where it's supposed to. The screeching you're hearing might be the capacitor sucking up power (with no-where to send it) and expanding... kinda like a corn kernal right before it pops in a microwave. You'll have to examine the innards of the PS first for anything that loose. Then, I would get a set of safety glasses on, and proceed to do the "loop" test... put a loop of wire into the 20-pin ATX power block connector, looping from the green pin to any black pin, then plug the PS in, and turn it on... make sure you keep your face away from the PS, and once you throw the switch, DO NOT TOUCH ANYTHING other than the switch again to shut it off. But, during this process, watch what happens within the PS to see if there are any sparks or other telltale signs of a fried capacitor, impeder, or resistor.

-----------------------~-------------------
Want to speed up commerce in the USA? Privatize the US Post Office, and turn it into a free-enterpise company that has to actually compete on the open market, instead of hide behind the government's skirt.
Predator Dec 04, 2005, 11:10am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
Max, thanks for all the help. I will be calling Antec support right now. I don't have the proof of purchase, but I bought it in July 2004, @ Fry's Electronics in Irving, Texas.

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Predator Dec 04, 2005, 11:14am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
Darn, their office hours are from 5-8 PST Monday-Friday...doh! Whatever happened to 24/7 tech support? :P

I can leave a message, but I think I'll rather just call during office hours.

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PCGEEK Dec 04, 2005, 11:17am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
Fan swaps in PSU are easy .

4 screws and solder on the new wires to the main board inside.

Predator Dec 04, 2005, 11:32am EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
I have no idea where to get fans like that. I think I'd be better getting an RMA? What do you guys think?

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Max Steiner Dec 04, 2005, 12:07pm EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
I look at it this way...

If it's not the fan, and you open it up, you voided the warranty.

I'd only open it up if you're unable to get a replacement for it. I open up cheapola power supplies all the time, simply to do mods on them (change fans from boring black ones to colored LED ones! :) )... but like I said, they're cheapolas, and don't even have the word "warranty" in their vocabulary. If a company as well-respected as Antec offers warranty coverage, I'd at least investigate that first...

... and then if that doesn't work, _then_ hack it up! :)

-----------------------~-------------------
Want to speed up commerce in the USA? Privatize the US Post Office, and turn it into a free-enterpise company that has to actually compete on the open market, instead of hide behind the government's skirt.
Adam Kolak Dec 04, 2005, 01:44pm EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
Yeah talk it up with Antec's support first.

And if you do decide to open up the PSU, be warned: High Voltage, do not open, possiblity of electical shock!
You where warned, LMAO!

Adam Kolak
Moderator, Hardware Analysis
adam@hardwareanalysis.com
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Predator Dec 04, 2005, 05:21pm EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
I know there's a lot of stored electricity. But one question, exactly how much is in there? I've heard there's around 10,000volts?

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Adam Kolak Dec 04, 2005, 05:26pm EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
Idk, but dont worry about it your not gonna get shocked if you open up your psu. As long as its unplugged and the power has all "drained" out of it. I was joking about getting shocked

Adam Kolak
Moderator, Hardware Analysis
adam@hardwareanalysis.com
DFI LP P35-T2RS | Xeon Quad @ 3.2Ghz | 4GB DDR2-1000 | 8800GT 512MB | See Profile
Predator Dec 04, 2005, 06:08pm EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
You sure? From what I've heard, the PSU still stores electricity, even after it is off.

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Fixer Dec 04, 2005, 06:23pm EST Report Abuse
>> Re: Weird noise from Antec 350W PSU
sorry it said i had to sign in and it posted? Blank

EDIT
Would be a good idea if you could RMA.
What i was thinking of was Motherboard "Dell" are you sure it's compatible with the PSU? some were not, don't know if this one is.


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