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Questions tagged [led]

165 questions
34
votes
6 answers

Is an LED monitor better for eyes than an LCD monitor?

Is an LED monitor better for eyes than an LCD monitor? EDIT: And if you are allergic to fluorescent light, is LED going to be better? I heard that LED doesn't uses fluorescent light.
Omu
  • 855
20
votes
4 answers

How can I make my computer play dead?

Possible Duplicate: Disable power LED blinks during Vista hybrid sleep? I have a laptop that when sleeping is perfectly quiet, which is great. What isn't so great is trying to sleep with led lights that get brighter and brighter, then dim, then…
wizlog
  • 13,573
17
votes
7 answers

How to turn on/off leds by terminal?

I would like turn on/turn off some of my leds running a command on linux. I use Ubuntu 12.04 LTS. I tried xset led named "Scroll Lock" xset led named "Num Lock" xset led 2 (this is the number of Scroll Lock as `xset q` says) xset led…
GarouDan
  • 605
11
votes
1 answer

Does raising LCD monitor contrast increase energy usage?

I've got a Dell S23340M - an LCD monitor with an LED backlight, which has built-in options to adjust the brightness & contrast. The monitor features a nifty "Energy Usage" bar that changes as you increase/decrease the brightness. When I increase the…
takanuva15
  • 265
10
votes
3 answers

LCD/LED screens; how color affects the power consumption?

I have read on web, for CRTs black color would reduce the power consumption of the monitor but for LCDs it's the white color that reduce the power consumption. It says "The way LCD's produce black is to energize all the pixels that need to be…
samsamara
  • 415
10
votes
3 answers

Disable power LED blinks during Vista hybrid sleep?

Does anyone know how to disable the blinking power LED when Vista enters hybrid sleep mode? My case has a very bright blue LED that is rather distracting. I'd rather not disable hybrid sleep, as it works perfectly and allows for much faster…
Anthony Giorgio
  • 609
9
votes
5 answers

Does Lowering The Monitor Refresh Rate Save Battery Life?

Is this a myth or is this for real? I read about it all and was wondering if anyone knows if it is true or tried it yet. Going from 60Hz to 40Hz
Rachel Nark
  • 701
9
votes
9 answers

Why does my mouse's LED not turn off when I shut down the PC?

Why doesn't my optical mouse's red LED turn off after I shut down my PC?
DrStrangeLove
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8
votes
1 answer

How to stop power light on PC from blinking when in sleep mode?

I regularly put my PC into sleep mode. Unfortunately the power button LED blinks every second and it's extremely bright blue which makes sleeping in the same room somewhat challenging. I have resorted to sticking gaffer tape on top but then it…
glenneroo
  • 2,377
8
votes
1 answer

How to test LCD monitors?

I will be buying a second hand monitor, a Benq LED Benq 24 V2420H FullHD. What methods can I use to test that the monitor is OK. I mean like dead pixels etc.?
hhh3112
  • 181
7
votes
2 answers

How do LCD monitors compare to LED monitors?

I'd love to get this LCD monitor, but I'm wondering if I should hold out until more LED monitors are on the market. I really like the brightness of the 27" iMac monitor and the above monitor is only rated at 5 cd/m2 less than that monitor, but…
evan
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6
votes
3 answers

How do I turn off MagSafe light?

When I go to sleep at night, the two green lights (emitting from both sides of the MagSafe connector of my 13" MacBook Air's power adaptor) light up my whole room. How do I turn these off? I currently just cover it with clothes, but doing so is…
ma11hew28
  • 748
6
votes
2 answers

Can I use the HDD LED or another LED to get process activity?

Can I get the status of a process by using the HDD and Power LEDs as indicators? I'd like to use the green power LED to tell me that a status is available, and the red LED to tell me that it isn't.
Marcell
  • 162
6
votes
4 answers

Why do most LED monitors have low contrast ratios? (1000:1)

I was just looking on newegg.com and I noticed that there are about 28 monitors have have a 1000:1 contrast ratio but only 5 that have the 5,000,000:1 contrast ratio...how come most LED monitors have a low contrast ratio? My LCD monitor now has a…
Thomas Schultz
  • 193
6
votes
3 answers

How to control Computer RGB LEDs in Linux

FWIW, I asked this question on Stack Overflow first. Since I switched to a new AMD Ryzen system my computer lit-up. All new hardware components seem nowadays to have such fancy(?) RGB-LEDs built in (even in memory modules, even the stock CPU-cooler…
gue
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