Power supply squealing noise.??????

[Davegod75]

I just got my brand new 400w Leadman power supplysee thread here today! whoo hoo
When i put the thing in and booted up it started to make this god awful high picted squealing type noise and other noise seemed to come out of the thing during time of heavy disk+cpu access. My system is 100% stable but this noise is insane. It is in no way berable and must be like 80db.


Anyone ever had something like this? It's not the fans because I stopped them and it continued to squeal? should i return this POS or wait and see if it needs to be broken in??

Thanks
null

 

[etech]

The only thing I have heard squeal like that is a transformer. When the lamnations are loose they can oscillate. If that is the case then it will have to be replaced.

 

[Cybordolphin]

A squeal from a power supply is the fan bearings going out. Since you are sure you ruled that out..... I am stumped.

How did you "stop" the fans!? Did you disconnect them.... or just jamb something in them to keep them from appearing to turn. If you jambed something in them... then it could still very likely be the bearings.... as the shaft to the fan could still be free spinning...... especially if one of the fans bearings/shaft is shot. try disconnecting the ps to the fans and check again.

 

[Davegod75]

Thanks for the quick replys

hehe... Well, I turned it off and jammed a pencil in there, I avoided the jamming of a metal pen in there So if you're right it I guess it still could be the fan.

Any more thoughts before i ship this thing back?

 

[jamarno]

Don't jam a pencil into the fan because the lead (mostly carbon) conducts electricity. Use only something made entirely of plastic, like a cheap pen.

When fan bearings go, they usually make a lower pitched whine or will even roar, but often it's not the bearing but a thrust washer. Otherwise, squealing indicates a loose transformer coil that can sometimes be cured by shimming it with a piece of cardboard or a toothpick, but this often doesn't work, and sometimes the squeal is caused by the power supply oscillating at far too low a frequency, which also greatly reduces its efficiency or maximum output capacity.

 

[Cybordolphin]

I'd still try disconnecting power to the fan (you might want to point a portable fan at it to be sure it doesn't overheat)..... and then turn on the power supply. If you just turn it on for a second to check for the sound... you won't damage the PS if the fan is disconnected.

If it is not the fan..... I'd consider getting a replacement.... unless you want to try the shim idea on the transformer. Be careful of the stored current in the capacitors, etc.. You can get a real jolt.... even if the ps is disconnected and turned off!

 

[hoomza444]

to keep from getting a jolt....unplug the power supply.......and then press the pwoer button and try and turn on the system. when u try and turn it on.it will drain the power out of the capacitors. then go haead and try it. i woud say easiest thing is not to open it and void warranty and to just go exchange it from wherever you got it. good luck

 

[Semper Fi]

I say return it for a new one. Even if you can fix it yourself there's no telling what else might go wrong with it. Get a replacement while it is still under warranty.

 

[Davegod75]

yeah I'm thinking I don't want to void any warranty this this bad boy is going back to it's home. Thanks guy's