Brightness can be set only on low setting

Question

Apple Thunderbolt Display

27" 화면 2560 x 1440 픽셀 해상도 Thunderbolt 및 MagSafe 케이블 부착물

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Nejc Sitar @nejcsitar

평판: 11

게시일: 2017년 2월 9일

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Brightness can be set only on low setting

Hello community,

I have a Thunderbolt Display which was used with my Macbook Pro (Windows 8.1 via Boot Camp). 2 days ago it made a clicking sound and the picture went dark on the Windows OS. After that I took the Monitor home and tested it with my Macbook Pro at home (OS Sierra). I can set the brightness in the Apple OS but only from Dark - 1 -2 Points (using ctrl + f2), when I go on the next one (Number 3) it doesn´t get brighter and the picture starts to flicker. All the next brightness Settings do not change the flickering or get brighter.

Installed the Firmware 1.2 - didn´t do any change.

Maybe someone had a similar issue...

Thanks in advance!

Nejc

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

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예 아니요

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I lifted the LCD Pannel, checked all the Connections (couldn´t see any problems). Left it alone for 3 days. After that it started working as usual again....

Nejc Sitar 의 2017년 3월 1일

Did the issue ever come back?

Yana Nikitenko 의 2018년 10월 5일

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Tim downing @timdowning

평판: 335

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1

게시일: 2017년 3월 1일

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It sounds like something went screwy with the power regulator that feeds the backlight.

해당 답변은 도움이 되었습니까?

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댓글 3개:

Well after I unplugged the Monitor it showed the same symptoms... Can I somehow repair the power regulator for the backlight? Or do I have to change it?

Nejc Sitar 의 2017년 3월 3일

Have a similar issue. If display brightness is set to above 70% after several minutes of use the screen goes black. Works totally fine if the brightness is below 70% (approximately). Replaced the power supply and tried a separate TB cable neither helped resolve the issue.

Yana Nikitenko 의 2018년 10월 5일

Hi Guys, having similar Issue. TBD flashing sometimes and later blackouts. When i lower the brightness it seems to work ok. Did you find out anything about the hardware or software driven reason of this problem? cheers!

Bela Brandes 의 2020년 4월 5일

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I lifted the LCD Pannel, checked all the Connections (couldn´t see any problems). Left it alone for 3 days. After that it started working as usual again.... — Nejc Sitar
Well after I unplugged the Monitor it showed the same symptoms... Can I somehow repair the power regulator for the backlight? Or do I have to change it? — Nejc Sitar
Have a similar issue. If display brightness is set to above 70% after several minutes of use the screen goes black. Works totally fine if the brightness is below 70% (approximately). Replaced the power supply and tried a separate TB cable neither helped resolve the issue. — Yana Nikitenko
Hi Guys, having similar Issue. TBD flashing sometimes and later blackouts. When i lower the brightness it seems to work ok. Did you find out anything about the hardware or software driven reason of this problem? cheers! — Bela Brandes

Apple Thunderbolt Display

Brightness can be set only on low setting

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