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Paper Tape
Posts: 2
Registered: ‎09-01-2011
Location: Malaysia
Message 1 of 11 (7,182 Views)

T420 Wifi Led light not turned on

[ Edited ]

I have a lenovo t420, and I notice that my WiFI led light on the bottom of the LCD panel is not lighted when i have my wireless on... My bluetooth led light works fine. I tried to switch both my Lenovo Access Connection and the switch button but nothing works? any idea ?

Punch Card
Posts: 35
Registered: ‎08-06-2011
Location: US
Message 2 of 11 (7,169 Views)

Re: T420 Wifi Led light not turned on

It's probably broken.  I'd call for support.

802.11n
Posts: 421
Registered: ‎08-13-2010
Location: Tucson, Arizona
Message 3 of 11 (7,149 Views)

Re: T420 Wifi Led light not turned on

[ Edited ]
Do you have the master Wi-Fi slide switch ON? Then, is the Fn+F5 power switch on? Both have to be on for Wi-Fi to functikon.
Paper Tape
Posts: 2
Registered: ‎09-01-2011
Location: Malaysia
Message 4 of 11 (7,129 Views)

Re: T420 Wifi Led light not turned on

My wifi is working fine..only problem is the LED light

Paper Tape
Posts: 6
Registered: ‎12-27-2011
Location: Hungary
Message 5 of 11 (6,256 Views)

Re: T420 Wifi Led light not turned on

Having almost the same problem. But on mine T420 both LEDs stopped working. (Bluetooth & WIFI )

Lenovo Staff
Posts: 3,700
Registered: ‎07-11-2010
Location: Malaysia
Message 6 of 11 (6,229 Views)

Re: T420 Wifi Led light not turned on

Try to update to the latest BIOS and see if it helps. If still dead then send it for service.

//JameZ
Paper Tape
Posts: 6
Registered: ‎12-27-2011
Location: Hungary
Message 7 of 11 (6,209 Views)

Re: T420 Wifi Led light not turned on

Hi JameZ,

 

It already has the latest BIOS. Next year I'll try to find an authorized service center, here in Hungary.

 

 

Paper Tape
Posts: 6
Registered: ‎12-27-2011
Location: Hungary
Message 8 of 11 (6,154 Views)

Re: T420 Wifi Led light not turned on

Hi JameZ,

 

It's me again. Yesterday i've noticed, that if the lid's opened less than 90 degree, all the LEDs are working.  I guess this could be a wiring problem, or a broken PCB. Could you please give me some info how it's made? Are the LEDs on a PCB?  Do they have a connector?

 

Thanks

Community Moderator
Posts: 4,675
Registered: ‎01-13-2008
Location: Bainbridge Island, WA, USA
Message 9 of 11 (6,148 Views)

Re: T420 Wifi Led light not turned on

Maybe this will help.  Page 96 or so, maybe other pages as well.

 

Hardware Maintenance Manual - ThinkPad T420 and T420i

 

Z.


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Lenovo Staff
Posts: 3,700
Registered: ‎07-11-2010
Location: Malaysia
Message 10 of 11 (6,139 Views)

Re: T420 Wifi Led light not turned on

@Panxter,

Since the T420 is fairly new (2011 model). I am sure your unit is still in warranty. My advice is to get this sent in to service for them to fix it.

//JameZ
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