iMac Screen Flickering after SSD install

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iMac Intel 21.5" EMC 2428

Model A1311 / Mid 2011 / 2.5 & 2.7 GHz Core i5 or 2.8 GHz Core i7 Processor

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Thomas Govern @ohytue

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发帖于: 2019年6月14日

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iMac Screen Flickering after SSD install

Hi there,

I recently installed a new SSD into our 2011 iMac to replace the hard drive.

All was working fine, however since screwing the LCD back in, the screen flickers consistently.

The brightness is set at maximum, if I reduce the brightness using the keyboard, the screen goes fully black. However I can still see an image behind by using a flashlight directly over the screen. I assume the backlight is not working.

I also purchased and installed a new display ribbon cable however that has not worked. Can anyone suggest anything?

Thanks

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@mayer

Hi! So I replaced the driver board. The flickering still occurs, however I have discovered that the LCD flickers constantly on max brightness now, but on minimum the LCD stays on? Before all I saw was black when I tried to reduce the brightness even by 1 bar.

I'm thinking LCD or the PSU? Can I measure anything with a multimeter?

由 Thomas Govern 完成的 2019年7月4日

Bump - any ideas?

由 Thomas Govern 完成的 2019年7月5日

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mayer @mayer

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MacHale Enterprises

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发帖于: 2019年6月14日

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Time for a new LED driver board:

iMac Intel 21.5" EMC 2428 LED Driver Board

iMac Intel 21.5" EMC 2428 LED Driver Board Replacement

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iMac Intel 21.5" EMC 2428 LED Driver Board

$29.99

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@mayer

Hi, thanks for the response.

What is the likelihood that it's the driver board? Like I said I just repositioned the screen, (everything was fine) then the flickering occured after next boot.

Some times when I put the new ribbon cable in I get a flash then a black screen, other times it's flickering.

由 Thomas Govern 完成的 2019年6月14日

On older machines it would be the inverter. The part is cheap and your best bet.

由 mayer 完成的 2019年6月14日

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@mayer

Hi! So I replaced the driver board. The flickering still occurs, however I have discovered that the LCD flickers constantly on max brightness now, but on minimum the LCD stays on? Before all I saw was black when I tried to reduce the brightness even by 1 bar.

I'm thinking LCD or the PSU? Can I measure anything with a multimeter? — Thomas Govern
@mayer

Hi, thanks for the response.

What is the likelihood that it's the driver board? Like I said I just repositioned the screen, (everything was fine) then the flickering occured after next boot.

Some times when I put the new ribbon cable in I get a flash then a black screen, other times it's flickering. — Thomas Govern
On older machines it would be the inverter. The part is cheap and your best bet. — mayer

iMac Intel 21.5" EMC 2428

iMac Screen Flickering after SSD install

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iMac Intel 21.5" EMC 2428 LED Driver Board

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