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Questions tagged [led]

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0
votes
2answers
55 views

Is it safe leaving monitors turned on (stand by) or could it harm the devices

I was wondering if I could leave my monitors turned on after I’ve turned off my pc, here are some other questions I had: Does the yellow status LED always suggest the monitor is in standby mode? ...
0
votes
3answers
874 views

What do CR_DET#_LED and HD_LED mean?

I was looking at a AMPKB-CT (Azure) motherboard. There were two LEDs: CR_DET#_LED, and HD_LED. I am guessing the HD_LED is for the hard drive. It was off, but I could hear the hard drive spinning. ...
2
votes
1answer
26 views

My HP PageWide Pro Printer's ethernet port is constantly flashing

The ethernet port LED (green) of my HP PageWide Pro Printer is constantly flashing in a very high frequency. Permanent, it seems to be 24 hours x 365 days even though the printer is not in use most of ...
0
votes
1answer
244 views

HP mute button LED not working

All of a sudden my mute LED stopped working. It was working fine for a while, but then out of the blue, it just stopped. At the same time, I also had an audio driver issue. So, I reinstalled the ...
0
votes
0answers
47 views

Is it okay if the Power LED to flash once while switching on UPS?

My CPUs front panel power LED is flashing once after I powered on the UPS. A 'TUCK' sound is also coming from my speakers. Is that normal or is there any issue with my motherboard?
1
vote
1answer
404 views

HP Elitebook Caps Lock blinks erratically, (17, 16, 12 times etc), screen never comes on (8770W)

Who has detailed repair information? I had to replace the motherboard after the old one failed to turn on completely. I've learned that the separate laptop components are all required (modem, ...
0
votes
0answers
20 views

PC works fine, motherboard LED blinks when it's off

I had left my desktop PC with an ASUS motherboard plugged in at night (I generally unplug it when I'm not using it) and I noticed it's motherboard LED was blinking. I unplugged it, waited 10 seconds ...
0
votes
1answer
121 views

How to turn off or disable the middle (scroll) button's light on my mouse?

I just bought a new Canyon optical mouse, but the middle button (scroll button) has a blue light. It distracts me. Is there a way to turn it off or disable it?
-2
votes
1answer
82 views

Generic RGB LEDs with Asus AURA compatible motherboard

Will this LEDs stripes work with a Asus motherboard AURA WS2812B 5050 RGB LED Strip 30/60/144 LEDs/M ws2812 IC Individual Addressable 5V [link ebay] My mobo: ROG-STRIX-Z370
0
votes
0answers
88 views

HDD activity on keyboard LED

to give an overview, here is my setup: Thinkpad X220 (+Dock,ext Display);Arch Linux; i3-gaps While the X220 has a HDD LED, I can't see it when its closed in its dock. For that, I have found this ...
0
votes
0answers
96 views

Notebook Asus X550L LED Screen is Very Dim

Hardware: Notebook: Asus X550LA Notebook Monitor: 15.6 Led Slim Asus 40 Hd Pins Graphics Card: Intel® HD Graphics 4400 Well, I've had this notebook for almost 4 years, it was in a notebook dock on ...
0
votes
1answer
79 views

What RGB Led to use to light PC

I recently build my first pc. I have no RGB lighting in it, didn't want it at the time to look like a circus. But I do have some components that light up. I want to light up the whole a bit more ...
0
votes
0answers
31 views

New mainboard faulty?

There is an issue with a new ASRock Z370 Extreme4 mainboard. It does not seem to switch on. Both the 24pin and 8pin (CPU) power cables are plugged in. The LEDs on the (Corsair 100R) case are not ...
-1
votes
1answer
52 views

Is it possible to program LED strip? [closed]

I bought a LED strip that uses molex connector to work. Is it possible to somehow control the strip from my computer and program it in some way to make it blink, fade etc. Here are few pictures of ...
10
votes
1answer
2k views

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 ...
0
votes
0answers
203 views

How to turn R/WEverything to batch: RGB Led automation

all of you kind people here at SuperUser Forums. I was wondering if you could help me find a solution to my problem. So, a brief intro to my problem. I recently built a PC featuring an MSI B350 ...
0
votes
1answer
31 views

How do I correctly wire up a 2-pin panel LED to a 3 prong pinout?

I've just finished building a system around the Asrock E3C236D2I C236 board and am having issues with the hard drive indicator LED and surprisingly all the other LEDs work fine. The pinout for the HDD ...
5
votes
2answers
913 views

Is there a way to use Caps/Numlock led for HD activities? [duplicate]

My laptop has not a hd activity led indicator. So, how could I use some other led (such as my keyboard NumLock or Capslock one) to blink when hd has some activity? Thanks in advance! OS: Linux ...
0
votes
1answer
57 views

lenovo ideapad s510g laptop screen display not able to see anything

I have a Lenovo Laptop S510g, the issue is a black screen. if I connect to TV by using HDMI Cable I can see that monitor is displayed correctly, and also I tried turning on torch so I can see the ...
0
votes
0answers
62 views

How does display (LCD/LED) connects to system bus?

The problem arose for me when I realized that the Laptops/PCs use two GPUs (one of them is an On-Chip low-performance and the other is an external high-performance GPU), and switch between these two ...
0
votes
1answer
92 views

How can I make a PSU power a lightbulb? [closed]

I'm making a steampunk PC chassis and I'd like to have the PC be able to light up lights like these Edison Vintage Bulbs: Is there a way to hook lights or anything else like that to a PSU or the LED ...
1
vote
0answers
79 views

MacBook Pro + Acer H236HL + electric standing desk

I have two external Acer H236HL displays connected to an mid 2015 MacBook Pro Retina all perched on a standing desk. The standing desk is a new addition. What I am finding is that when I raise or ...
0
votes
1answer
137 views

How can I completely disable the on-board LEDs on my ASUS motherboard?

I have an ASUS Z170 Pro Gaming motherboard. When I bought it, I did not realize it annoying always-on red LEDs: Now, these can be turned off using the BIOS, but - that doesn't "stick". They tend to ...
0
votes
3answers
194 views

Will 0.5 volts overvoltage damage a LED monitor?

I have a brand new LG LED monitor but for reasons which I won't detail here, I would like to run it with 19.5 volts instead of the 19 volts it is rated for (it came with a power supply of 19 volts). ...
1
vote
1answer
1k views

How can I disable the LEDs on my Gammaxx 400 CPU cooler?

I've bought and installed a Gammaxx 400 CPU cooler: It works well enough, but there's a problem - on its four corners are annoying shocking-blue LEDs. I want to turn them off! Yet - there doesn't ...
0
votes
1answer
586 views

What is an OH LED?

My SuperMicro case has an led labeled OH LED. It's in the bundle of wires with the other LED lights and switches. What does that stand for and go to?
1
vote
0answers
304 views

Samsung LED monitor SyncMaster SA300 horizontal dark lines

When I started a video game, suddenly all over the screen appeared a lot of horizontal, dark lines. At first I thought it was graphic card problem, but I've changed monitor and everything looked fine. ...
0
votes
3answers
4k views

Does disabling laptop keyboard backlight LEDs improve battery life?

On a laptop, if you press the key that turns on/off the backlight on the keyboard, does it improve battery life? I ask this because I find myself instinctively disabling the LEDs when I don't need ...
0
votes
1answer
217 views

Debug LED code off, no speaker sound

Any idea, why my new mainboard is not showing the post code / does not beep at all after start ? The cpu cooler is spinning. Only the audio light is on. I attached the 2 connectors power and cpu. The ...
-4
votes
1answer
105 views

Why don't a normal computer have a CPU LED? [closed]

So most desktop/laptop/server computers have a HDD indicator LED, but do not have a CPU LED, why is this? I asked a long time ago on another forum, but only a few people answered and they said "it's ...
0
votes
1answer
572 views

PC Power LED stopped blinking when in sleep mode

pc power led stopped blinking when in sleep mode. when pc is in normal mode, there is no problem. Can you help me why this is happening and hos can i fix this? Thanks.
1
vote
0answers
71 views

Computer freezes and CPU LED hangs

My CPU led hangs(stop blinking and constant led ) and also hangs display. It shows display problem sometime monitor shows out of range signal . I have format windows(windows 7(32 bit)) number of times,...
4
votes
3answers
2k views

Is changing DPI of LED harmful?

I just bought a 23" widescreen LED monitor for my Windows PC, I always use CRT monitors, it is the first time for me to work on a LED monitor. I am a low vision, so I always increase DPI. Is ...
1
vote
0answers
1k views

Why is there no red light on the CPU after I press the power button

Today I got a 4 GB RAM for my PC. SO I turned on my PC, without this new RAM, and it gave a warning about wrong system time. So I pressed F2 and it loaded normally. Then I turned it off and inserted ...
0
votes
0answers
56 views

LED monitor takes about 10 minutes to power on

Recently, I have started to face this problem: I power on my monitor and PC, and there's no LED light on my Asus LED monitor (ASUS VH197). I have to wait for 5-10 minutes for the screen to show up ...
1
vote
2answers
65 views

Power and hard drive LED won't turn on

I built a computer and everything worked fine. And then later on I decided to get a new case for it. After that the computer still turned on and worked fine, but when I turn it on the power LED and ...
1
vote
1answer
12k views

What is the difference between these display screens?

Please check these 3 products: http://www.snapdeal.com/product/CompaqPres/89388 http://www.snapdeal.com/product/lenovo-ideapad-30015isk-notebook-80q700uein/639467071061 http://www.snapdeal.com/...
0
votes
1answer
444 views

Disable light sensor of Webcam which lights up LED

I use an external webcam with pre-built LED lights which light up in low-light situations. The light sensor is on the top of the webcam. The software supplied with the webcam doesn't have a function ...
3
votes
2answers
1k views

How can I turn off the LEDs on the front of my laptop(ASUS K501LX-NH52)?

Is there a way to turn off the lights on the front of my laptop? My laptop: http://www.newegg.com/Product/Product.aspx?Item=N82E16834232753R. I am currently running a dual-boot of KDE Fedora and ...
0
votes
0answers
105 views

LED monitor disturbed image, but before VGA is plugged it is OK

My monitor shows the setting menu (when I press the menu button of the monitor) very well (clear image) but the image output from my computer (desktop) is disturbed (like an old TV that has weak ...
1
vote
1answer
279 views

Can I set LCD/LED or OLED monitor refresh rate to around 0Hz?

I think that this would be perfect for reading(like E-ink with backlight), and would lower eye strain in situations where high refresh rate is useless. It would be even better if the refresh rate ...
0
votes
1answer
6k views

Whats the difference between WLED and LED in displays?

I want to buy a laptop which have LED backlit display but there are other laptops better than that with WLED backlit display having same price tag. Can anyone explain me what's the difference between ...
0
votes
2answers
301 views

Why is the network activity LED keeps on blinking nonstop really fast?

I never noticed my desktop's Ethernet network activity light or LED is blinking all the time NONSTOP until couple of months ago. I think it was always that way whole time, but my question is why. I ...
0
votes
0answers
88 views

Why is straight-on viewing of inexpensive LCD screens no longer the best angle?

I bought several inexpensive tablets in a range of sizes. Each is from a different manufacturer. I have not taken them apart, but using a magnifying glass, I can tell that each screen appears to be ...
1
vote
1answer
1k views

Turn off LEDs on case fans?

I'm thinking of getting LED strips with adjustable colors for my PC. The problem is that I have several case fans, all with bright LEDs on them. I want to turn off these LEDs. What my first idea is is ...
0
votes
0answers
583 views

Increasingly growing vertical lines on my laptop screen (Dell Inspiron 7520 SE)

I've had these 2 vertical lines since yesterday. Their length have doubled since then ! Would someone please help identifying the problem and the solution ? I've had this laptop for around 2 years now ...
1
vote
1answer
62 views

Pink LED on case with high processing C++ program

I have written a very intensive program in C++ that should loop on some code for a quite long time. I can't explain why, after few minutes, the program stops working (I don't see any output) and a ...
4
votes
1answer
11k views

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

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 ...
0
votes
1answer
1k views

Editing /sys/class/leds/phy0-led/ configs

I am trying to configure LEDs on my laptop running Xubuntu 14.04. I found out that there are some configs that affect LED behaviour, located in /sys/class/leds/phy0-led/. There are 3 relevant files: "...
-1
votes
1answer
943 views

Connect an RGB LED strip over USB [closed]

I am building a PC and wanted to do custom lighting with an RGB LED strip. I could connect an Arduino to one of the internal USB headers but decided that I wanted to try and connect the power to molex ...