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What is the purpose of the light in the top bezel of the ThinkPad T400?

T400/410/420 and T500/510/520 series specific matters only
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Paragraphogram
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What is the purpose of the light in the top bezel of the ThinkPad T400?

#1 Post by Paragraphogram » Wed Jun 13, 2018 2:52 am

I want to know what the purpose of the light in the top bezel is. My theories so far are that it's an early form of keyboard backlight for the dark or it's a light for reading papers in the dark... The light isn't very bright though...

dr_st
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Re: What is the purpose of the light in the top bezel of the ThinkPad T400?

#2 Post by dr_st » Wed Jun 13, 2018 3:55 am

Welcome to the nineties. :)

http://www.thinkwiki.org/wiki/ThinkLight

And welcome to the forum too! :D
Current: Thinkpad 25 (20K7), Yoga 14 (20FY), X220 4291-4BG, T410 2537-R46, T60 2007-QPG, T42 2373-F7G
Collectibles: T430s (IPS FHD + Classic Keyboard), X32 (IPS Screen)
Retired: X61 7673-V2V, T60 1952-F76, A31p w/ Ultrabay Numpad

Paragraphogram
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Re: What is the purpose of the light in the top bezel of the ThinkPad T400?

#3 Post by Paragraphogram » Wed Jun 13, 2018 4:43 am

Huh, interesting, thanks for the info :D

w0qj
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Re: What is the purpose of the light in the top bezel of the ThinkPad T400?

#4 Post by w0qj » Thu Jun 14, 2018 1:43 am

We actually prefer the ThinkLight !

ThinkLight can illuminate a piece of paper that is beside your computer,
allowing you to work in otherwise compete darkness.
Actually tried to do office work in such situations, and it works!

The illuminated keys cannot do this.
Daily Driver: X1 Carbon 4th Gen (X1C4): i7-6600U 2.6GHz; 16GB DDR3 1866 MHz; 1TB PCIe-NVMe SSD; 14" WQHD 2560x1440; LTE EM7455 Mobile Broadband; Win7 Pro 64bit
Current Thinkpads: X1C4 | X1C3 | X250 | X230 | T410
Retired Thinkpads: T42 | 560 (circa 1996)
~~IBM Thinkpad era computer bag !

TonyJZX
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Re: What is the purpose of the light in the top bezel of the ThinkPad T400?

#5 Post by TonyJZX » Thu Jun 14, 2018 3:41 am

To be fair, sometimes the light is so dim it barely lights up the kbd.

But otherwise its darn useful... eg. i use it to see small objects in a conferenece room etc.

I'm pretty sure Lenovo is determined to erase this on future models.

As far as I know, only the HP Elite tried to replicate the light on only their 1st gen models coming onto 10yrs ago and they used a physical switch so it looks like the pop up headlights on a 1980s sports car.

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Re: What is the purpose of the light in the top bezel of the ThinkPad T400?

#6 Post by jdrou » Thu Jun 14, 2018 2:47 pm

TonyJZX wrote:
Thu Jun 14, 2018 3:41 am
To be fair, sometimes the light is so dim it barely lights up the kbd.
It was sort of ahead of its time; we've got brighter LEDs available now.

I've been saying for years that pretty much anything that has a battery should have an LED light of some sort, given the battery is generally the largest & heaviest part of most lights.
Current Thinkpads:
X31, X40, X61T, X61, X201, X220 (i7 IPS), W520 (2720QM/2000M/FHD), T440p (i7-4800MQ/GF730GT/FHD)
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Daily driver: Dell XPS 13 w/Kaby Lake+Iris Pro+TB3

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Re: What is the purpose of the light in the top bezel of the ThinkPad T400?

#7 Post by TPFanatic » Thu Jun 14, 2018 9:36 pm

Thinkpad X200 and newer Thinkpads had a revised Thinklight outlet shape that improves the breadth of the light.
lenovo T61 T7500, SXGA+, 8GB
lenovo T430 i5 3320m, HD+, 8GB
lenovo T500 P9700, WUXGA, 8GB
lenovo X201 i5 520m, WXGA, 4GB
lenovo T520 i7 2760QM, FHD, 8GB



Enable advanced features on older Synaptics touchpads with the registry: http://forum.thinkpads.com/viewtopic.php?f=2&t=122612

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