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Jolla display issue [answered]

asked 2016-10-04 15:29:57 +0200

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updated 2016-10-04 15:43:10 +0200

hlev80 gravatar image

I'm planning to contact support, but thought would share it here as well first.

My display's been acting up for 3 months, permanently. I've learned to live with it for I like the phone. I'm sure there's a correct terminology for the issue, a better one than "flickering", or someone may have an idea on the root cause?

When the problem started the device was being used in a sealed, water-tight bag and were sitting on the sun, but not directly exposed to it, for longer periods (1-2 hours at a time) running an Android app. There was no mechanical impact or excessive mechanical force applied. The weather wasn't wet either.

Everything works and all display related tests pass in the CSD utility.

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The question has been closed for the following reason "the question is answered, an answer was accepted" by hlev80
close date 2018-12-08 00:53:16.176524



Yep, seems to be a HW problem.

juiceme ( 2016-10-04 15:34:28 +0200 )edit

Not sure if phones have them, but many aging non-led laptops have a similar issue, usually this has to do with a faulty power inverter.

Andrik ( 2016-10-04 16:30:40 +0200 )edit

Thanks. I believe there are no power inverters in mobile phones. My optimistic scenario was that maybe a display related kernel parameter got crooked, but I don't know what to look for. I'm inclined towards a hardware failure too.

hlev80 ( 2016-10-05 01:17:46 +0200 )edit

@hlev80, basically there are 2 possible ways to implement the backlight of a LCD screen; with LED's or with an EL panel. At least up to quite recently EL panel is cheaper than LED backlighting so I suppose it well might be used in Jolla sbj1 device.

EL panel needs a supply voltage in the range of tens of volts and requires an inverter to upconvert the battery voltage...

juiceme ( 2016-10-05 06:37:34 +0200 )edit

Thanks @juiceme, so EL panels need AC, beyond just a higher voltage? I learned something today indeed.

hlev80 ( 2016-10-05 18:35:59 +0200 )edit

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answered 2018-12-07 13:48:22 +0200

hlev80 gravatar image

Display was kindly replaced under warranty. Thanks Jolla!

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After two more years?

Pohli ( 2018-12-07 17:22:39 +0200 )edit

Nope, back in '16. I just wanted to wrap up the story.

hlev80 ( 2018-12-08 00:53:01 +0200 )edit

I had my display replaced under warranty too, but it didn't take two years :)

tux_in_iE ( 2018-12-08 02:02:21 +0200 )edit

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Asked: 2016-10-04 15:29:57 +0200

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Last updated: Dec 07 '18