No image or backlight, but has power.

Lets see if we can narrow down the issue. Plugged in to your system and powered. Take flashlight and place it on the screen at an angle are you able to see your desktop icons? If you do then you know the issue is the back light driver which has failed.

Did you haver a power surge or lighting strike?

You'll need to find a schematic and trace out the voltages on the logic board, most likely its gone.

해당 답변은 도움이 되었습니까?

예 아니요

점수 2

댓글 5개:

Hi,

I tried this already and there is no image on the LCD.

Alexy Mikhailichenko 의 2018년 3월 3일

No, these are secondhand models I acquired separately. No surges that I'm aware of, both have good power supplies. Speakers and camera work so it has to be the LCD or logic board.

I have the schematic and will go in and start probing the test points, but is this a common failure with a known cause on these logic boards?

Alexy Mikhailichenko 의 2018년 3월 3일

I've replaced three Supertex HV9982 3-channel switch-mode LED driver IC, a few bad cables assemblies and a cracked screen. Otherwise these monitors are durable.

Dan 의 2018년 3월 3일

Hi Dan

I’ve the same issue. But I can see with the flashlight. What should I do ?

Kevin 의 2022년 5월 29일

@kevin833 - You'll need to dig in checking the backlight connections both the logic board and the display checking the voltages.

If this is too much then you'll need to find someone with the deeper skills to help you.

Dan 의 2022년 5월 29일

댓글 달기

Apple Thunderbolt Display

No image or backlight, but has power.

답변 1개

Update (03/03/2018)

귀하의 답변을 추가하세요