Keyboard flashing lights

Keyboard flashing lights DEFAULT

keyboard leds blinking, keyboard unresponsive

I have this issue I've been struggling to find a cure for couple of years of using Fedora 14 64-bit 2.6.35.14-106. Today, I found additional info, so I'd like to get an answer so I can proceed further.

Occasionally, maybe once a month, my old Win95 PS/2 keyboard would have all 3 LED lights blink twice, then become unresponsive. Everything else works (usb mouse, network, etc.) and no error messages. I would usually restart the PC and it would fix itself. But sometimes, after trying some key presses without response, another blinking twice occurs, and the keyboard then works.

Last month, I replaced it with a black PS/2 keyboard, that never had issues on a different PC (and I have the same model on a 3rd PC that never has issues).

Today, after one month of use, this black keyboard would have all LEDs blink continuously, and unresponsive. Again, everything else works, and again, no errors in dmesg output, /var/log/messages (no kernel panic or oops), or .xsession_errors. The only thing I remember doing was mis-pressing Shift and CapsLock together, which would change the keyboard layout.

This time, I logged out from gnome instead of restarting, and the blinking stopped about 5 seconds after logging out. And the keyboard then works.

My biggest question at this point: Is LED blinking only controlled by software? Can the keyboard have functionality to blink LED by itself? Or the motherboard can do that without software control? Or the BIOS?

If the answer is that only software can control LED blinking, then I can deduce that it's not the hardware problem (at least not the keyboards), so the next time this happens, I can kill each program one by one to find out who is the culprit.

I'm trying to check if the problem is some bug in gnome/x11, or firefox/flash, or nepomuk/kmail (those were the only major programs running after the first boot about an hour prior to the keyboard problem), or keyboard driver/layout software, or a memory fault/power supply/keyboard connector/capacitor problem (hopefully not, since I had replaced with a new brand power supply a few months ago and I clean out dust regularly inside the PC.)

Sours: https://forums.fedoraforum.org/

Hi Primordialnyx,

 

Thanks for posting.  Apologies that your system is not performing as expected.  

 

Your post does not indicate if you have performed a systems diagnostics to troubleshoot the hardware.  If you haven't done so, please run Dell SupportAssist, make a note of any error messages encountered and post back.

 

If there are none, please try performing a system restore by doing the following:

A) Disconnect all peripherals(printer, external drive, etc...) from computer

B) Power off computer

C) Unplug the AC adapter from computer and wall socket 

D) Remove Battery from the computer

E) Press and hold in the "Power On" button for 15 seconds then release

F) Plug in the AC adapter into the wall socket, then the computer

G) Press the "Power On" button.

 

Hopefully your computer run normally.

 

If the system is under warranty, please contact me privately. Be sure to include your personal information (name, address, telephone, email) and your computer's service tag number in your message. Thanks.

 

If there is no warranty, then you could contact our Out of Warranty team to get a quote for a paid service call -http://dell.to/1vnT6CQ

Sours: https://www.dell.com/community/Inspiron/Keyboard-backlight-flashing/td-p/6218846
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If your Mac keyboard, mouse, or trackpad indicator light is flashing

When your Apple wireless keyboard, mouse, or trackpad is turned on, the indicator light flashes twice in succession, pauses, then repeats (blink-blink-pause, blink-blink-pause). This means the keyboard, mouse, or trackpad is “discoverable” by your Mac, and you can connect your Mac with it. After 3 minutes, the indicator light turns off. The keyboard, mouse, or trackpad is still on, but it is no longer discoverable. To make it discoverable again, turn it off, then turn it back on.

When the wireless keyboard, mouse, or trackpad connects with your Mac, the indicator light illuminates steadily for 3 seconds before it turns off. This indicates that the device has successfully connected with your Mac.

While your Apple Magic Mouse is connected to your Mac, the indicator light blinks at a regular interval. It might blink fast or slow, but in all cases, a regular blinking pattern means the mouse is connected to your Mac and is operating properly. The indicator light on an Apple wireless keyboard doesn’t blink.

See alsoUse an Apple wireless keyboard, mouse, or trackpad with MacConnect a Bluetooth device with your Mac

Sours: https://support.apple.com/guide/mac-help/keyboard-mouse-trackpad-indicator-light-mchlp2873/mac
How to fix your Corsair keyboard (Flashing lights fix)

My keyboard keeps blinking, I hear sound but my screen is black and won't turn on?

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Sours: https://forums.tomsguide.com/threads/my-keyboard-keeps-blinking-i-hear-sound-but-my-screen-is-black-and-wont-turn-on.206870/

Flashing lights keyboard

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

If you took out your motherboard and then put it back
in again then it is likely that this caused the problem.

Regardless of this, you would be better off posting
in a PC hardware group. This newsgroup deals with WinXP
and its relationship to hardware devices. Your PC does
not even get close to launching WinXP!


<[email protected]> wrote in message
news:[email protected]
> Thanks.
>
> I just tried that but cant get into BIOS. I dont think
> the keyboard is working as the lights on it are flashing
> constantly.
>
> It is a relatively new motherboard. It worked fine
> before, but I took it out to try another system inside
> the case and since I put it back in, nothing...
>
>
>
> >-----Original Message-----
> >
> >"Claire" <[email protected]> wrote in message
> >news:[email protected]
> >> My computer refuses to start up. When powered on, the
> >> monitor light flashes (as though it is on but receiving
> >> no signal) and the num lock, caps lock lights flash.
> The
> >> cpu fan is working, and i have tried with a different
> >> hard drive and it still does this. So its not the CPU
> or
> >> the Hard drive. Ive tried unplugging the cd and fdd but
> >> have the same problem. Im beyond lost.
> >>
> >> Does anybody know how I can fix this?
> >
> >Try getting into the BIOS (usually by pressing the
> Delete key
> >early in the boot phase).
> >
> >If you can't, you may have a motherboard problem. Take
> the
> >machine back to your friendly dealer.
> >
> >
> >.
> >

 

Sours: https://forums.tomshardware.com/threads/computer-will-not-start-up-keyboard-lights-flashing.1114848/
How to fix RII 8I FN + F1 blue and yellow blinking.

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