Questions tagged [led]

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28 views

White semi-transparent horizontal line on LED TN monitor, any way to fix?

Recently a white semi-transparent horizontal line appeared across my 2 year old LED TN monitor, near the top, and I find it super annoying. I am sure it's the monitor and not the input device because ...
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2answers
54 views

How to control Computer RGB LEDs in Linux

[I asked this on stackoverflow 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 ...
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10 views

Do keyboards have a selftest result indicated by LEDs?

After yesterday's Windows 10 update and reboot, BIOS hung before booting. As it turned out it's something with the keyboard. Still I'm unsure whether it's the keyboard (only 30 years old ;-)) or the ...
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1answer
101 views

Why are my Keyboard LEDs blinking when shut down?

Recently my keyboard LEDs started blinking when my PC is shut down (see video here, sorry for the quality). Only when the PC is shut down, as soon as I boot they stop blinking. I think it started ...
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0answers
54 views

Kali linux keyboard led not turning on after installing gnome

I have one of those keyboards that has its "scroll lock" key as its led backlight switch. I used to turn on my keyboard with the command "xset led". but then i decided to install ...
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2answers
28 views

Does a graphic card needed in led 32 inches normal TV using as monitor

I wanna change my lg 32 inches led TV into a monitor so this screen is much larger than normal monitor so plz suggest me if I have to add some graphics card into this or their is no need to add ...
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0answers
38 views

Can RGB Fans work without them being lighted up?

i did a small research and still don't if RGB fans can work without the being lighted up. the real question is: Can i connect only the SATA POWER of the RGB controller? without connecting the MB? And,...
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1answer
81 views

Dell Latitude 5501 front LED flashing white-amber

I have a Dell Latitude 5501 and since today the front LED started flashing white-amber (1,1). When checking the docs, I find this site from Dell, but the pattern 1,1 is not described. Connecting or ...
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0answers
79 views

Acer 22" K222HQL poor quality with viewing area / angle?

I'm having some trouble with an Acer monitor we bought a few months ago. I've just started using it with my Mac, but the issues don't seem related to the mac. I'm just wondering whether there is a ...
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2answers
748 views

Changing thinkpad microphone mute LED behaviour

I was wondering and looking if someone has been able to make the following. Led indicator ON = Microphone ON // Led indicator OFF = Microphone OFF I think is the way it should work, not the default ...
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2answers
1k views

Flashlight/Bright Light Damaging LED/LCD screen?

It is known that direct sunlight on a LED or LCD screen can cause damage. Would a flashlight of 110 lumen shining directly on a LCD or LED screen cause damage to the screen? Would that same 110 ...
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0answers
121 views

How to make the LED lights in my PC box in my Lenovo Ideacentre Y720 Cube desktop turn off?

I want them off all the time even after restart, there's Lenovo Nerve Center but it turns them off only until a restart (the last time I checked)...
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1answer
48 views

PC won't turn on and the NIC LED flickers for 50 seconds?

So i have had this issue for a while now(mostly after the last cleanup perhaps), but previously it did turn on after just sitting behind the power cord for 5 minutes or so, but now it won't even turn ...
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0answers
329 views

Connecting RGB LED strip to pc controller

I just bought a computer case Sharkoon pure steel rgb. It comes with 4 rgb fans that connects to a controller according to the following image: After connecting these 4 fans I still have 4 more empty ...
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0answers
69 views

Is “Dot Pitch” the distance between like-colored LEDs?

My understanding is that LEDs provide backlight in LED displays, while dot pitch is the distance between subpixels on the screen——these two are completely different concepts. But according to New ...
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19 views

Accessing the Debug LEDs on Dell OptiPlexes

Dell OptiPlex machines have debug LEDs on the front panel that say 1-2-3-4.  How can they be accessed from Linux/Ubuntu?  Perhaps via ACPI commands?
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0answers
357 views

Strange issue with Dell PowerEdge R610 hard drive status lights

I setup a test FreeNAS server the other day on a spare Dell PowerEdge r610 and noticed that the hard drive activity LEDs are always both lit no matter what the server is doing. I have 6 1TB 7.2k SAS ...
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2answers
2k 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? ...
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3answers
1k 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
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1answer
55 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 ...
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1answer
3k 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 ...
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0answers
82 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?
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1answer
7k 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, ...
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1answer
34 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 ...
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2answers
411 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?
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1answer
251 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
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1answer
217 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 ...
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0answers
33 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 ...
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1answer
69 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 ...
11
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1answer
3k 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
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1answer
74 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 ...
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2answers
2k 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 ...
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1answer
477 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 ...
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0answers
125 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
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1answer
347 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 ...
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0answers
89 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
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1answer
700 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 ...
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3answers
963 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). ...
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1answer
6k 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 ...
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1answer
1k 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?
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0answers
646 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. ...
2
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3answers
15k 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 ...
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1answer
570 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 ...
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1answer
250 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 ...
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1answer
2k 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.
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0answers
395 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,...
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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 ...
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0answers
5k 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 ...
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0answers
207 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
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2answers
531 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 ...