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  #76  
Old 01-23-2014, 01:11 AM
mr_zen256 mr_zen256 is offline
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Just registered to acknowledge I had exactly the same issue of LED failure with my Silver K70. I sent the KB back to the place of purchase on the 9th of Jan and a replacement is due back to me on Monday. The failed keys were F12 and Pause Break.

I will report back if my replacement keyboard suffers a similar fault.


Last edited by mr_zen256; 01-23-2014 at 01:16 AM.


  #77  
Old 01-23-2014, 03:57 PM
excaka excaka is offline
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i have 4 as of now. just popped up out of nowhere. whats the procedure to get this fixed?


  #78  
Old 01-23-2014, 07:19 PM
Toasted Toasted is offline
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Request an RMA to replace the keyboard.


  #79  
Old 01-25-2014, 06:30 PM
rob81 rob81 is offline
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LEDs keep dying. Haven't even used my keyboard since I posted few days ago.
Now 7 and keypad minus dead.

When it starts, it's a chain reaction, so I think there is a mainboard power problem frying LEDs.

Last edited by rob81; 01-25-2014 at 06:33 PM.


  #80  
Old 01-25-2014, 07:49 PM
dinosaur dinosaur is offline
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I bought a K70 Blue two months ago, and so far so good: LEDs are still lighting fine.

I am however a bit worried with all these threads about dead LEDs, and I was wondering if you guys could give more clues about how you use your keyboard, so to possibly spot what would be the common factors that lead to dead LEDs.

Here are some questions that I think would be relevant:

- At what intensity (low, medium or high) are you setting the LEDs (I personally use them at medium intensity) ?

- What is the voltage at your USB connector (that's also what the keyboard is powered from and an over-voltage combined with too tight a tolerance on the keyboard components could be an explanation). Mine is 4.85V and a normal voltage should be between 4.75V and 5.25V (measured between USB pins 1 and 4, i.e. the outer pins of the USB type A connectors). BEWARE: be extra-careful with the multimeter leads when measuring the voltage: don't short-circuit the +5V pin with the shield of the connector (you don't want to blow up your mother-board !!!).

- What is the serial number of your keyboard (we could easily detect a bad serial, if all dead keyboards pertain to it) ?


  #81  
Old 01-25-2014, 08:12 PM
rob81 rob81 is offline
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- low intensity, worked till then. then 2 weeks LEDs off -> dead

- connected to USB3 directly to mainboard, dunno the volts but it's an asus p8z77-v pro

- serial: shouldn't matter, all K70 have those problems

- it's not related to hard button mashing. think i never used the numpad "-" since i bought it but it's led is dead.

Last edited by rob81; 01-25-2014 at 08:24 PM.


  #82  
Old 01-25-2014, 10:17 PM
mr_zen256 mr_zen256 is offline
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Yeah, it's definitely not button mashing or general use of the keys at all. I don't think I even pressed the Pause Break key once and the LED died.

- Low intensity lighting here
- Unsure of voltage - Asus P8P67 Pro
- Haven't got the serial as my replacement KB is still in transit

Last edited by mr_zen256; 01-25-2014 at 10:21 PM.


  #83  
Old 01-26-2014, 12:37 AM
GWXerxes GWXerxes is offline
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Default Video of odd mixup with the custom backlight mode

I just figured out that I enter the custom back-lighting program mode and attempt to toggle a one of the dead keys -- it lights up different key. I didn't show it in the video, but the half-lit keys will STAY half-lit when they keyboard is taken out of programming mode and the custom profile is activated

Link to video of my keyboard
http://youtu.be/EJyqjZivz70

My mainboard is an Asus Sabertooth 990FX
Voltage off of the USB is 5.00 volts even -- don't have a spare USB cable to test the current the keyboard is drawing
S\N is 292313408412
Lot Number is 13408412
I ran both of my keyboards at various lighting intensities

Last edited by GWXerxes; 01-26-2014 at 12:49 AM.


  #84  
Old 01-26-2014, 03:38 AM
mr_zen256 mr_zen256 is offline
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That video was very interesting. I also tested the faulty LEDs of my KB in the programming mode and found that the actual keys in question (F12 and Pause Break) were dimly lit, not random keys as shown in your clip.

I'm wondering if it's more of a circuit board issue rather than the actual LEDs themselves. LEDs typically are very rugged and tend to have a long lifespan.

That being said, I'm also not an engineer so I'll leave that to the experts to determine. I don't have a lot of faith my replacement Kb will fare much better than the original board. Regardless of what Corsair is saying, this issue is a lot more widespread than what they are letting on.

Aside from the LED faults, I loved using the keyboard while I had it so I really hope Corsair can find a solution for this.

Please, can anyone tell me if the Black K70 is also experiencing the same LED failure rate as the Silver K70? If my replacement board also suffers from faulty LEDs, I'd be willing to switch to the other model.


  #85  
Old 01-26-2014, 07:04 AM
rob81 rob81 is offline
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Could it be the USB port @ keyboard ? If I remember corretly I used USB Sticks 2 times.
Since then all started. Maybe inserting one fries something inside?


  #86  
Old 01-26-2014, 07:41 AM
mr_zen256 mr_zen256 is offline
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Quote:
Originally Posted by rob81 View Post
Could it be the USB port @ keyboard ? If I remember corretly I used USB Sticks 2 times.
Since then all started. Maybe inserting one fries something inside?
I didn't use a USB stick in my K70 at all.


  #87  
Old 01-26-2014, 05:27 PM
GWXerxes GWXerxes is offline
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Quote:
Originally Posted by mr_zen256 View Post
I'm wondering if it's more of a circuit board issue rather than the actual LEDs themselves.
Maybe it's a software issue? Do you think there is some kind of "hard reset" function on the keyboard? I doubt it's storing profiles/settings in volatile memory, so there would need to be some sort of hardware switch or jumper to reset the flash memory.

I found a thread where somebody disassembled a K70 and there seems to be some open connectors.
http://geekhack.org/index.php?topic=41795.0
http://imageshack.us/a/img12/4206/cpaj.jpg

So IF it is a software/firmware error, we could potentially fix it with a reset. Has anybody here tested to see if the LEDs are actually dead? I'm not too into tearing down my K70 as it cost me a lot of money, so I don't have any way to find out

Last edited by GWXerxes; 01-26-2014 at 05:32 PM.


  #88  
Old 01-26-2014, 05:42 PM
mr_zen256 mr_zen256 is offline
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Quote:
Originally Posted by GWXerxes View Post
Maybe it's a software issue? Do you think there is some kind of "hard reset" function on the keyboard? I doubt it's storing profiles/settings in volatile memory, so there would need to be some sort of hardware switch or jumper to reset the flash memory.
That would be great news if it were a software fault that a firmware update could fix. Since this issue doesn't appear to be affecting the Black K70, I'm guessing it may be a manufacturing fault as surely the silver and black K70 would be using the same software?


  #89  
Old 01-27-2014, 08:14 PM
GWXerxes GWXerxes is offline
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Default More Dead LEDs

Well I've had five more LEDs die in less than 12 hours while the back-lighting was off....

I've also thought up another possible explanation for my odd mix up shown in the video I posted

I'm thinking... IF the LED is indeed dead and not allowing any current to flow through it, maybe that current is bleeding into other keys/areas. Again I'm not an electrical engineer so I don't have any real experience to back up my theroy.


  #90  
Old 01-27-2014, 09:08 PM
rob81 rob81 is offline
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Had backlight also off since the last post. Another key dead, this time Numpad /
Every day another one dies :(

This can't be faulty LEDs. It's cheap mainboard design carried over to x versions of K70.
There is some event which triggers an overload and kills leds one by one after.

Last edited by rob81; 01-27-2014 at 09:13 PM.


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