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Is this caused by a loose inductor? What could be going on here? - Page 2

post #11 of 26
Yea, it's an inductor. You can either re-solder it or bake it. Soldering is safer but you have to be careful not to melt the epoxy.
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post #12 of 26
Quote:
Originally Posted by EduFurtado View Post
I will, but I want to understand what's going on
just sent ASUS a RMA request



From google most people say it's an inductor (at first I thought it was a resistor)
The wierd thing is.. it's not any stress above 2d clocks. It also crashes randomly on 2d clocks
Any way you slice it, you have a bad power phase. Hopefully the rma goes smoothly for you.
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post #13 of 26
Thread Starter 
Quote:
Originally Posted by tsm106 View Post
Yea, it's an inductor. You can either re-solder it or bake it. Soldering is safer but you have to be careful not to melt the epoxy.
I think the solder is fine, something inside it is broken.
What does an inductor does?
post #14 of 26
It's used a choke to filter the incoming power.
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post #15 of 26
Thread Starter 
Quote:
Originally Posted by tsm106 View Post
It's used a choke to filter the incoming power.
So... that incoming power not always needs to be filtered, and that's why it crashes "out of nowhere". Does this makes sense?
post #16 of 26
I'm not sure what you mean by crashes out of nowhere but the inductor is not supposed to be loose. If it is, it's either the solder broke or the epoxy holding it together is broke. Btw, the card doesn't use all its phases until it needs to.
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post #17 of 26
Thread Starter 
Quote:
Originally Posted by tsm106 View Post
I'm not sure what you mean by crashes out of nowhere but the inductor is not supposed to be loose. If it is, it's either the solder broke or the epoxy holding it together is broke. Btw, the card doesn't use all its phases until it needs to.
The computer crashes out of nowhere. There is no pattern whats so ever. It doesn't seem to be related to any event. but this is what I meant : "Btw, the card doesn't use all its phases until it needs to."
it crashes when sometimes it needs to use that phase.


This makes sense

What doesn't is.. How the hell that thing got loose? the card has never shown any problem for more than a year :/
post #18 of 26
Overheating is the only way to damage an inductor. And trust me, you need to overheat them by quite a lot.

I'm surprised that the inductor got damaged instead of the MOSFETs. I've driven around 150W (at 6V) by one of those inductors and it got scorching hot, but didn't cease functioning. It's more likely that when it overheated the MOSFET wasn't working correctly, thus it shortcutted (the Mosfet acts as a gate in a buck converter and the inductor is used to lower the voltage as well as limiting the power that can flow, determined by its inductance), and got damaged.


In any case, you have a damaged power phase, and you shall send it to RMA.
   
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post #19 of 26
Thread Starter 
Quote:
Originally Posted by Artikbot View Post
Overheating is the only way to damage an inductor. And trust me, you need to overheat them by quite a lot.

I'm surprised that the inductor got damaged instead of the MOSFETs. I've driven around 150W (at 6V) by one of those inductors and it got scorching hot, but didn't cease functioning. It's more likely that when it overheated the MOSFET wasn't working correctly, thus it shortcutted (the Mosfet acts as a gate in a buck converter and the inductor is used to lower the voltage as well as limiting the power that can flow, determined by its inductance), and got damaged.


In any case, you have a damaged power phase, and you shall send it to RMA.
I know you are right about the heat because I have searched and found out they should be good up to 125C, and there are some blocks that don't cover any of these r23 inductors because under load they are usually under the 50C maximum with the passive cooling.
Anyways, what could have gone wrong with the MOSFET in the first place?

Thanks for your explanation
post #20 of 26
Thread Starter 
Why am I so unlucky with RMAs?
Here is the email I sent to asus:

Quote:
[Problem Description]
First of all, I know this email is for north america only and that I am living in argentina
(south america), but I need an RMA and I was going to ship it to you guys and then ask
you to send it back to somebody at an embassy that would then hand me the card (you
wouldn't ship the fixed card to argentina, but to somebody I know there in the US)

The computer has been acting oddly lately so I decided to open the card (after I was
100% sure the problem was this card) to clean off any dust and see what could be the
problem..

The part moving (I think it is an inductor), is just the black one, which means the solder
is just fine (or appears to be)

The other R23 things are all fine and steady like rocks, just like I think this one is
supposed to be.


By the way, the computer usually goes down under load or when "something
happens" for example, when I click something, when I alt+tab - in order words, when
the OS catches an event...
The screen goes black and the card's fan kicks to 100%

I thin the problems started after I bought my second card (now I have a crossfire X
setup).. and this is the older card


I haven't attempted any kind of repair, I just want to RMA it straight away.

So.. How can I do it? Shall I send it to you, or should I use ASUS global website do
process?

Thanks in advance
and their reply:
Quote:
Dear Valued Customer,

Thank you for contacting ASUS Technical Support

My name is Sonny and it's my pleasure to help you with your problem.

The card has to be purchased in the US or Canada to get the itme repaired here. Plus it has to shipped from an US or Canada address and shipped back to a US or Canada address.

If you would like to speak to a technician please call

EEE Family and notebook support

888-678-3688

Desktop Support

877-339-2787

All other products.

East Coast: 812-282-2787.
West Coast: 510-739-3777

Hours:

Mon to Fri 8:30 AM to Midnight EST
Sat and Sun 8:30 Am to 6:00 Pm Est

Product Information: http://www.asus.com
Product Support: Http://support.asus.com
Accessories: http://estore.asus.com/shop
Live Chat: http://livesupport.asus.com

Best Regards,

Sonny B.

ASUS Level 2 Tech Support

Our goal is 100% customer satisfaction. Please fill out the survey below to help improve our customer service.
My last reply...
Quote:
Thanks for the fast reply, Mr. Brown,

So, I have simply no warranty whatsoever?
What can I do to get this repaired?

By the way, the card was bought in the US and if there is nothing left to be done I can ship it to family or somebody I know in the US, then you ship back to them and finally they ship back me, but this sounds just unfair...

Regards,
Eduardo
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