Monday, May 13, 2013

How To: Reset Logitech Solar Keyboard K750


I happened to go on an extended trip and left my keyboard powered on throughout the week. When I return, I encountered a recurring keystroke issue that keeps typing 'q'. What I tried is to turn off and on the keyboard repeatedly that does not resolve it. Thinking this keyboard would need a hard reset, I tried to remove the rechargeable battery which just does not want to be removed - pincers, metal plates, flat screw drivers - the battery tray just doesn't give in and slide out! I gave up eventually.

So as a last resort, I gave Logitech a call to report the issue and asking if I could get an exchange since this is in warranty. The customer service representative provided me a wonderful solution that I could not find it anywhere, so here's the steps:
  1. Turn off the keyboard.
  2. While holding onto CAPS lock, keep pressing a few keys for the next 5 or more seconds.
  3. Turn on the keyboard.
Voilà, that's cleared the energy stored in the capacitors and keyboard works again!

Update: Finally, it's the battery!

The keyboard gave in again. It started with continuous 'q' and the above solution did not work. I took out the battery (finally and with a lot of struggle), place it back and gone, no longer works anymore. It does not pair but has a continuous blinking red :-(.

So I went ahead to purchase another of the same keyboard (K750r to be exact). Still unwilling to give in, I took out the battery of the new keyboard and plug it into the old one. That does it!

For those who are interested, the battery is a Maxell ML2032 Rechargable 3V.

61 comments:

  1. Hi I've faced the same issue and I still cannot solve the problem.
    I followed your guide, but I cannot understand what does 'few keys' means.
    Please let me know for saving my K750.
    Thank you.

    merry@merrymerry.net

    ReplyDelete
  2. Hi Kevin,

    It's essentially pressing some random keys on your keyboard. If this doesn't work, then you would want to get it repaired.

    Good luck.

    ReplyDelete
  3. Thank you so much!
    I almost gave up but your tip saved the life of K750.
    In my case, I needed much more 'few keys' more than 10 or 20 keys.
    Thank you again!!

    ReplyDelete
  4. I am having the same problem with my K750 - it regulary types some letters by itself, later when I press one button, it gives on screen one more additional letter, which can be different from the letter I pressed on keyboard.
    Also, after 3-5 minutes my keybard doesnt connect to unifying receiver. I unpaired it, but to pair it back took me at least 15 minutes, because receiver was not getting a keyboard. After re-pair problem was the same.

    I will take your advice, I hope this will help.

    ReplyDelete
    Replies
    1. Your problem seems to be different. Is there still power when it disconnects from unify receiver? I believe it could be a battery fault or the board itself. RMA might be a better bet. Hopefully you could get this solved. :-)

      Delete
  5. well i have another issue than you, i have a k750 black and the battery is fine (tested with a multimeter and powered a led for 1h, but my keyboard keeps disconnecting (i do not have the multiple char issue). the thing is when i hit the "test light" button to see if there's enough sunlight to recharge the battery the little led doesn't even turn red or green.

    so it's the connection of the battery that is bad (inside the tray). maybe only my model, but really if i bend the keyboard up where the battery is located, i can see immediately the led turning red / green.

    so i might just hack it (crack open it) to force a connection between the battery and the keyboard, but for now, bending the keyboard does the trick.

    really i am disappointed, this keyboard is nice, but the fact that logitech stated that the battery is not changeable it's pure stupidity. all battery fail one day. what a bad move for the ecology, most people will trash their keyboard and buy a new one (not even removing the battery because it's almost impossible).

    sorry... long post, bad english. but do not buy product from logitech with this mentality it's going nowhere (or only for money).

    ReplyDelete
  6. I have a brand new K750. It worked perfectly on Monday, not so good on Tuesday, and now today it has completely stopped working. I have only had it for 3 days. There are no lights on it when I push the battery button. Please help.

    ReplyDelete
    Replies
    1. To be frank, if its brand new I would have either DOA it with Logitech or bring the lemon back to the shop for an exchange. It isn't worth the effort to troubleshoot something that is brand new.

      Delete
    2. But how do you troubleshoot this. Ive had mime about a year and earlier i put it outside to charge. When I brought it in the battery light showed no response to the power switch and the keyboard does not type

      Delete
  7. You legend! Now I can type q again without worrying that I will get thousands of the little blighters!!

    ReplyDelete
  8. Help! I've somehow hit a button that is made all of my wireless connections unavailable. Because it's a wireless keyboard, any Internet search yields nothing with the words Wi-Fi

    ReplyDelete
    Replies
    1. I know it's a simple fix but I can't find anything at all to manage the issue. I've use the keyboard so much that all of the letters and numbers have worn off the looking at pictures of the keyboard online is shielding no results either

      Delete
  9. Hello
    Just followed your tutorial and ... didn't work ... what did work (my "e" key was over sensitive) was buying a can of compressed air and spraying around the "e" key for about 10 seconds
    The "e" key is just like all the other ones : PERFECT !!!
    Good luck to everyone

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  10. any how-to's with getting the battery out ( mine failed a after a week of use and three weeks away )

    ReplyDelete
    Replies
    1. Nope, I had to force mine out. There are notches on the left and right which would bend in making it harder to take it out. Hope this helps.

      Delete
    2. See https://www.ifixit.com/Guide/Logitech+K750+Keyboard+Battery+Replacement/23376 for info on getting the battery out

      Delete
  11. I am having a problem with mine where the Shift key works just fine when typing, but when trying to use the Shift key in applications like Mail or Photoshop, it doesn't work...

    Any ideas? This is getting super frustrating

    ReplyDelete
    Replies
    1. Nope, I don't have any ideas. Sorry.

      Delete
  12. Thanks a lot. This method just worked for me also. Much appreciated.

    ReplyDelete
  13. Caps lock reset worked for me. Amazing tip

    ReplyDelete
  14. turn it off and hold down the caps lock and press random keys like if its a piano for over 15 seconds. Then turn it back on and it will resolve the issue.

    ReplyDelete
  15. i got a k750 which just died without warning after about 9 months - amazon replaced under warranty, the new one did the same after 18 months, i was in the middle of typing at the time and it just died, nothing, zilch. apart from this i had no problems and loved it but the caps lock reset does not work for me but as the keyboard appears dead this does not come a shock!!

    ReplyDelete
    Replies
    1. i have since purchased a battery and now the unit works fine - LOGITECH are against anyone changing the battery with the words "not recommended" given to me in an email about this issue, BUT the keyboards does have a 3 year manufacturers warranty and so long as you have your receipt they will replace the keyboard [even for a dead battery].

      The biggest issues then appears to be the battery, changing it potentially invalidates your 3 year warranty but after 3 years try it!! I tested mine by popping out the original battery and popping in a standard 2032 battery - just a cheap one 8 for a £1 at the local pound shop - the keyboard came to life proving the battery was the issue. i simply ordered a new rechargeable battery and now it is back up and running as it always has and as i expect.

      What i cannot fathom out is why Logitech would prefer to give you a new keyboard under warranty than recommending a new battery which clearly for them is a much cheaper option!!!

      Delete
    2. Because that would be them admitting, that their product doesn't work.
      Why pay the premium for a solar keyboard, if you have to change battery every now and then.

      Logitech, back to the drawing board!

      Delete
  16. Omg Thank you so much for this post! My keyboard had me scratching my head for a month. I recently moved and had not used my keyboard for a couple of weeks, when I set up my pc my mouse was working but the keyboard (even though it said it was 100% charged) was dead. I tried reinstalling the software and driver but nothing worked. I tried this and BAM up and running! Thanks again

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  18. Omg Thank you so much for this post! My keyboard had me scratching my head for a month. I recently moved and had not used my keyboard for a couple of weeks, when I set up my pc my mouse was working but the keyboard (even though it said it was 100% charged) was dead. I tried reinstalling the software and driver but nothing worked. I tried this and BAM up and running! Thanks again

    ReplyDelete
  19. Thank you about tip on resetting keyboard. I had numpad key 6 (or right arrow without numlock) being pressed sometimes on its own :)

    Looks like it solved my problem, but will keep an eye on that.

    ReplyDelete
  20. For me it was Y and F that went haywire; let's see how long this lasts before it happens again. Thank you!

    I would love a better description of how to open that battery hatch without damaging it too much.

    ReplyDelete
    Replies
    1. https://www.ifixit.com/Guide/Logitech+K750+Keyboard+Battery+Replacement/23376

      Delete
  21. This comment has been removed by the author.

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  22. fOR ME IT IS the S and 9 keys that just don't do anything when touched? I tried the reset recommended and nothing. any suggestions?

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  23. fOR ME IT IS the S and 9 keys that just don't do anything when touched? I tried the reset recommended and nothing. any suggestions?

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  24. THANK YOU! Huge Help! S key is working again for me. :)

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  25. Solution did not work for me. I took the rechargeable battery from keyboard #1 (that was working) and inserted it into keyboard #2 that was not working. The battery worked in itially in #2 (I was checking to see if the problem with #2 was the keyboard itself or the original battery). HOWEVER when I returned the battery to #1 that keyboard now did not work. And when I put it back in #2 - that did not work. So now I have 2 keyboards that do not work !!!

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  26. Thank you, thank you, thank you.

    I had paired my keyboard with a different usb receiver while travelling and when i got home i could not get it pair with the original! Infuriating!

    CAPSLOCK reset worked a treat. Thank you, again :D

    ReplyDelete
    Replies
    1. Hi,

      Could you say what exactly you pressed to reset it? You pressed CAPSLOCK+ hold other keys for 15 seconds than released everything and just turn it on?

      Delete
  27. BE CAREFUL with unpairing and pairing this keyboard too many times - I had my first one replaced under warranty because I did it too much and the keyboard stopped pairing. I have several laptops and Logitech Unifying mice for each one, but only the one keyboard that I would unpair and re-pair to a differnt transmitter. Well, after so many times of doing this, the keyboard reaches a "limit" and stops pairing with anything else, with no warning. I have unpaired mice several hundred times with no issue, and I have unpaired other Logitech Unifying keyboards a hundred times with no issue...this is the only model that reaches a pairing limit and refuses to pair ever again. Now my second k750 keyboard has reached its "limit" and refuses to pair with any of my transmitters...I'm done.

    ReplyDelete
  28. I have pairing problem also. Not paired once to another or same one. Now I can not use it.

    ReplyDelete
  29. My green and red leds are okay, but my keyboard its not working...

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  30. Useless information everywhere...

    My keyboard was working like a charm, i switched it off and on again, and it stopped working. Changed the battery, with cr2032, exact same voltage, did not work. Plugged it into an energy source with 3v, did not work. Replaced the battery with ml2032, did not work. Pressed on capslock and other keys for a while to reset capacitators. Did not work. No sign of life at all. Bullshit product, DONT BUY IT ! DONT BUY LOGITECT AGAIN !

    ReplyDelete
  31. Even after changing to ml232 battery, the letters qqqq keep coming back. After pressing caps lock while powered off, and other random characters, the qqqq keeps coming back.

    ReplyDelete
    Replies
    1. Hello, maybe the manual can be useful - https://www.usermanuals.tech/d/logitech-k750-user-manual

      Delete
  32. We think that my husband swept his hand across the keyboard, because it then stopped working. It is an older model with the larger receiver. I tried both suggestions above, (turning off, cap log ...etc) and changing the battery, but still won't work. Because it is no longer in warranty customer (no) service will not help. all they did was offer suggestions for a newer model.

    ReplyDelete
  33. I tried pairing my K750 with a different Unifying reciever, and it just stopped working. When I turn it off and on again, the red LED gives 1 blink, and then nothing. The Light-level indicator does not do anything. The reset-trick does not work. Ideas?? It worked perfect for 3 years before this happened. Don't think I ever paired it with a different reciever before. Very frustrating, especially since the warranty period is over :-(

    ReplyDelete
    Replies
    1. Well, you can try changing the battery. But if the depreciation rate covers the cost, you probably want to buy another keyboard. It's been years since this keyboard first released, so it's probably time to change it? Give that a thought too.

      Delete
    2. I already tried. Did not work. Seems This model has a flaw If you try to reconnect. Very dissapointing Logitech wont help.

      Delete
  34. This is the most unlucky keyboard I've ever bought. I had all sorts of problems with this keyboard. Drivers on the keyboard are constantly broken, I think it was some kind of conflict with the operating system. I always kept it at hand, you can click here. This is a good way to keep your PC clean.

    ReplyDelete
  35. This, turned out, is a common problem. My CTRL is getting tired every half a year, and no matter how good a keyboard is, it can`t withstand my 24 hours of work at the PC.

    In fact, I often have to install drivers, and the list needed to
    Logitech Drivers Download here http://bitdrivers.com/manufacturers/logitech. If necessary, you probably know where to find the right driver) Good luck!

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  36. After messing with this, I pressed the button that looks like a sun. I think it is a reset button. It solved the problem.

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  37. This comment has been removed by the author.

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  38. My keyboard died last night. After reading all of the comments I opened up the battery compartment which they obviously do not want you to do and replaced the old battery with a Duracell 2032 and the keyboard is working fine. So, I'm not sure why you need the rechargeable one. I'm just going with this one for now.

    ReplyDelete
    Replies
    1. Be careful. The keyboard will still attempt to charge the battery. There are instructions on the net which show how to open the keyboard and disconnected the charging circuit if replacing with a regular battery.

      Delete
  39. hi, I have this keyboard and it stopped working. Can someone please explain exactly how to do the caps reset. I should hold caps pressed down and then press other keys? It doesn't seem to have any effect. I've tried changing the battery.

    my 6-key on the numpad is either virtually stuck and typing 6666666 or it doesn't respond at all. Now I can 't make right shift+d work either.

    Any advise would be appreciated because I love this keyboard. I have an early K750 for PC.

    ReplyDelete
    Replies
    1. it has also started to disconnect after very short periods of not being used, just a few minutes. I have to turn it off and on to make it reconnect but it never behaved like this before.

      Delete
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