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Possible Duplicate:
Unplugged wire in Dell Vostro 1510 laptop?

I have experienced dropping wireless connection problem with my Lenovo T400 with both Ubuntu 12.04 and Windows 7. I am trying to examine the inside of my laptop, to see if it is because the wireless adaptor has become loosely fitted in. Following are two front views of the inside of my laptop (the second one is a little closer than the first):

enter image description here Closer look: enter image description here

I notice there is a white line wearing a black hat on one end, and this end is not connected to any place. (This line is singled out by a pair of tweezers in the second picture)

  1. I wonder what this line for, and where it should connect to?

  2. Is it the reason that my wireless connection is often dropped?

    If not, where might be the problem?

Thanks and regards!

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marked as duplicate by Moab, Ƭᴇcʜιᴇ007, KronoS, Mokubai, Dennis Jul 21 '12 at 14:06

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 2 down vote accepted

That's a spare antenna for a 3x3 WLAN card. It shouldn't be causing the problems you're experiencing, because, as you can see, it's not actually connected to anything.

Check that the two antenna leads connected to your WLAN card (black and grey) are seated properly.

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Thanks! Is my WLAN card the green chip with white label covered most of its front, shown in the top right corners of both pictures? – Tim Jun 2 '12 at 13:41
@Tim Yes, that's the one. The model is most likely Intel WiFi Link 5100, or 5150 if you also have WiMAX support. – Indrek Jun 2 '12 at 14:01
Thanks! Yes, it is Intel WiFi Link 5100, with Model 512AN_MMW. The two lines black and grey are connected to my WLAN card tight. What else physical connections/... might cause the problem and I can check while the inside is being open now? – Tim Jun 2 '12 at 14:06

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