Libra 2 Weird noise while reading

A-Curiosity · 02-02-2022, 10:42 AM

When I am reading I can constantly hear my libra making a weird electronic noises, that sounds a little like coil whine. I've had this before with an e-reader but only when turning the page. I'm rather bothered by it, because it's relatively loud: I can hear it from a distance of 40 cm. Is there something that can be done about this, in terms of fixing it myself, or sending it back? I do hope this is not normal behaviour from the libra 2. Any help would be greatly appreciated!

Colonel Cathcart · 02-02-2022, 10:52 AM

Quote:

Originally Posted by A-Curiosity

Is there something that can be done about this, in terms of fixing it myself, or sending it back?

Sure there's something you can do about it. Listen to death metal for a few hours while cranking the volume to 11 till your hearing degrades to the point you no longer hear that noise.

enuddleyarbl · 02-02-2022, 01:34 PM

I've seen various posts like this (and usually about the Libra). But, I've never seen a single solution. In computers, it's usually caused by the inductors on the gpu vibrating because of the high frequency they operate at. It's just flabbergasting that there would be any equivalent in a static display e-ink screen.

I suppose some mechanical wizard with a lot of money and spare ereaders could open one up, listen for whatever's making the noise and put a dab of hot glue or something on it. But, no one's ever done anything like that on YouTube. And, I can't see a normal person doing it.

Quoth · 02-02-2022, 03:10 PM

Maybe the front light is on.

Sirtel · 02-02-2022, 03:17 PM

Quote:

Originally Posted by Quoth

Maybe the front light is on.

It's always on on all my eraders, but none of them makes any noise I can hear.

rcentros · 02-02-2022, 05:36 PM

Quote:

Originally Posted by A-Curiosity

...Any help would be greatly appreciated!

I'm guessing it's a defect (otherwise we would hear more about it). I would look into exchanging your Libra 2.

NiMa · 02-02-2022, 11:25 PM

My Libra (1) does this, but only when charging. You could try unplugging the USB cable, if the reader was/is charging.
Try a reboot, too. Probably won't do anything, but it is worth trying, we never know

davidfor · 02-03-2022, 02:52 AM

Others have mentioned hearing an electronic whine in the past. And did have it from one of my Kobos. But, I had to hold it close to my ear. I can't remember which it was, and none are speaking to me now. It might have gone away, or my hearing is.

Do you have it in a case? There is a good chance that would block the sound.

In any case, if it is as loud as you say, and it bugs you, take it back and exchange it. Hopefully another one won't be as loud.

A-Curiosity · 02-03-2022, 11:42 AM

I opened up the device to see inside and figure out exactly what the problem is. Using my hearing and the lay-out of the circuit, it's highly probable that part LA3 is the culprit at hand, supporting the theory that the noise is, in fact, coil whine. However, this cannot be fixed by a user, as applying any kind of pressure does not lessen the noise. If this happens to anyone else in the future, and the noise is too loud and therefore too disrupting whilst reading, I do indeed recommend returning it (instead of fruitlessly voiding the warranty).

The e-reader was not connected to a power supply, and the front light was not on. The battery was at 90%. The problem does not seem to depend on the book.

Antioch · 02-04-2022, 08:42 AM

You should still try and exchange it

02-02-2022, 10:42 AM	#1
A-Curiosity Enthusiast Posts: 29 Karma: 60084 Join Date: Aug 2020 Location: The Netherlands Device: Kobo Clara 2E, Kobo Libra 2, Kobo Aura HD	Weird noise while reading When I am reading I can constantly hear my libra making a weird electronic noises, that sounds a little like coil whine. I've had this before with an e-reader but only when turning the page. I'm rather bothered by it, because it's relatively loud: I can hear it from a distance of 40 cm. Is there something that can be done about this, in terms of fixing it myself, or sending it back? I do hope this is not normal behaviour from the libra 2. Any help would be greatly appreciated!

02-03-2022, 11:42 AM	#9
A-Curiosity Enthusiast Posts: 29 Karma: 60084 Join Date: Aug 2020 Location: The Netherlands Device: Kobo Clara 2E, Kobo Libra 2, Kobo Aura HD	I opened up the device to see inside and figure out exactly what the problem is. Using my hearing and the lay-out of the circuit, it's highly probable that part LA3 is the culprit at hand, supporting the theory that the noise is, in fact, coil whine. However, this cannot be fixed by a user, as applying any kind of pressure does not lessen the noise. If this happens to anyone else in the future, and the noise is too loud and therefore too disrupting whilst reading, I do indeed recommend returning it (instead of fruitlessly voiding the warranty). The e-reader was not connected to a power supply, and the front light was not on. The battery was at 90%. The problem does not seem to depend on the book. Attached Thumbnails Last edited by A-Curiosity; 02-03-2022 at 11:50 AM.

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02-02-2022, 01:34 PM	#3
enuddleyarbl Guru Posts: 776 Karma: 1538394 Join Date: Sep 2013 Device: Kobo Forma	I've seen various posts like this (and usually about the Libra). But, I've never seen a single solution. In computers, it's usually caused by the inductors on the gpu vibrating because of the high frequency they operate at. It's just flabbergasting that there would be any equivalent in a static display e-ink screen. I suppose some mechanical wizard with a lot of money and spare ereaders could open one up, listen for whatever's making the noise and put a dab of hot glue or something on it. But, no one's ever done anything like that on YouTube. And, I can't see a normal person doing it.

02-02-2022, 03:10 PM	#4
Quoth Still reading Posts: 13,987 Karma: 103895653 Join Date: Jun 2017 Location: Ireland Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper	Maybe the front light is on.

02-02-2022, 11:25 PM	#7
NiMa Fanatic Posts: 507 Karma: 2390534 Join Date: Jun 2020 Location: Somewhere in the Universe Device: Kobo Libra, Glo HD, Touch C/B, Mini, Glo, Aura SE, Clara HD, KT	My Libra (1) does this, but only when charging. You could try unplugging the USB cable, if the reader was/is charging. Try a reboot, too. Probably won't do anything, but it is worth trying, we never know

02-03-2022, 02:52 AM	#8
davidfor Grand Sorcerer Posts: 24,905 Karma: 47303824 Join Date: Jul 2011 Location: Sydney, Australia Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos	Others have mentioned hearing an electronic whine in the past. And did have it from one of my Kobos. But, I had to hold it close to my ear. I can't remember which it was, and none are speaking to me now. It might have gone away, or my hearing is. Do you have it in a case? There is a good chance that would block the sound. In any case, if it is as loud as you say, and it bugs you, take it back and exchange it. Hopefully another one won't be as loud.

02-04-2022, 08:42 AM	#10
Antioch Connoisseur Posts: 79 Karma: 10 Join Date: Jun 2011 Device: Nook STR, Kobo Aura H2O, Kobo Libra 2	You should still try and exchange it

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