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Old 11-09-2020, 08:06 AM   #1
joedoe
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is my kobo forma screen broken(horizontal and vertical line)

got strange horizontal line and vertical line on the screen, it doesn't go away even after factory reset, not sure whether the screen is broken or something, did anyone have similar issue?

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Old 11-09-2020, 10:33 AM   #2
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Quote:
Originally Posted by joedoe View Post
got strange horizontal line and vertical line on the screen, it doesn't go away even after factory reset, not sure whether the screen is broken or something, did anyone have similar issue?
I have a similar vertical line in my screen. I can't see in your picture whether it's 'negative' (dark line on a light background, light line on a dark background) as it is with my Forma.

It's probably a screen driver issue. I'm living with it until it gives up the ghost completely.
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Old 11-09-2020, 08:08 PM   #3
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It may be broken, but looks like a controller problem. Is the vertical line completely straight or any curve/jag in it (would indicate broken)? You'll be able to tell when you turn it on and start flipping pages -- if it's broken parts of the screen won't update.
Of course, a controller problem could also be considered broken -- I'd say it's a hardware issue one way or the other.
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Old 11-09-2020, 09:02 PM   #4
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If it's under warranty I'd ask them if it can be exchanged.

The typical problem with a vertical line is a fuzzy one on the side by the buttons, caused by some design failure; it goes away if I turn down the brightness.
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Old 11-10-2020, 12:47 AM   #5
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The Forma uses a flexible plastic TFT, it wouldn't showcase the usual glass cracks shown on earlier... glass TFT when they... crack .

That, on the other hand, could be a badly seated flex cable. Or something worse. So, yeah, if it's under warranty, call CS.

And, no, this has nothing to do with the Forma's famous frontlight sidebar of doom (because, first: duh. And, second, the frontlight is off on the "connected to a computer" screen).
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Old 11-21-2020, 06:26 AM   #6
joedoe
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thanks all for the reply, i think this is definitely a hardware problem, it's not going away no matter what i do with the reset etc.., and now i got 2 vertical lines instead of 1, they are showing as negative line, similar to this one

https://www.mobileread.com/forums/sh...d.php?t=334431
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Old 01-26-2021, 05:26 PM   #7
timisreading
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My Forma developed the same problem yesterday. Two perfectly straight thin lines. One horizontal, one vertical. Have yours gone away?
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Old 01-27-2021, 12:41 PM   #8
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Either broken, or if you are very lucky the ribbon connection needs remounted.
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Old 01-27-2021, 12:43 PM   #9
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Remember that the Forma has a plastic TFT, so it's potentially more likely to be a badly seated cable than a broken screen than on other devices .

EDIT: Oh, I'm parroting myself.
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Old 01-27-2021, 01:12 PM   #10
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How long have you had it? Can you return it easily?

I would be frustrated as he** if my Clara HD did that.

If it’s not constant, the I suspect only related to that situation, and not hardware. And not your concern to work on technical issues anyway.

I would take mine back and show them, and ask to replace unless sufficient explanation, well, because I can take easily back to the shop where I bought it.

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Old 01-27-2021, 01:16 PM   #11
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I had a Sony Reader PRS-505 that had a vertical line show up on screen. Eventually, the screen under the line stopped updating and remained blank. It wasn't a problem screen. I would say a controller fault.
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Old 01-28-2021, 09:45 AM   #12
timisreading
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How long have you had it? Can you return it easily?
Eighteen months. Still feels new to me, but long enough to be out of warranty.

I'm not excited about the prospect of opening it and checking for properly seated cables, but that seems like my only option right now. I've really enjoyed using this Kobo and I hoped for a much longer device lifespan than this!
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Old 01-28-2021, 11:11 AM   #13
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I've really enjoyed using this Kobo and I hoped for a much longer device lifespan than this!
Don't let that turn you away from Kobos or ereaders in general, it's just luck of the draw as with any electronics. I've got Kobo Glo HDs from 2015 that are still working perfectly. Although I don't use anything else now but the Glo HD, I've got Kobo Glos from 2012 and even Sony 350s from 2010 that are still like new and working perfectly. I charge them every 3 months or so just to keep the batteries good.
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