L9000 lcd power connector blown on old and new logic board?

Question

iMac Intel 27インチ EMC 2429

モデル番号A1312 / Mid 2011 / 2.7 & 3.1 GHz Core i5もしくは 3.4 GHz Core i7 Processor, ID iMac12,2

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Davinder singh @davidruled

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投稿日: 2020年7月20日

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L9000 lcd power connector blown on old and new logic board?

hi guys and girls,

first of all thanks for your help in advance.

My iMac keeps blowing l9000 on logic board. First one blew randomly. I got a new logic board. iMac powered on and blew the L9000 on the new logic board as well.

I don’t know what is happening?

i checked the diagnostics leds 1,2,3 light up but 4th doesn’t. iMac powers but no chime that might be Bcz I removed the HD and disk drive.

Any help is highly appreciated.

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Dan @danj

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I think your looking at the collateral damage not the cause! As you can see in this schematic snippet

The Inductor is on the 12volt feed to the displays T-CON logic on the back side of the display panel. So the cause is something within the display panel. At this point you’ll need to replace the inductor on the logic board as well as try another display assembly.

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So I should buy a new logic board and lcd panel Bcz I don’t have the skills to solder.

Davinder singh さんによる2020年7月20日

Thats a very expensive repair! Have you checked for a local repair shop? Where do you live? Country & nearest city.

Dan さんによる2020年7月20日

I live in Prince Edward Island canada. My city is Charlottetown.

Davinder singh さんによる2020年7月20日

Wow! Well isolated from COVID (hopefully)

The nearest shop I can find is in Moncton, NB Cell Phone Repair See what then can do for you. They should have the needed skills and getting the needed inductor shouldn't be difficult. So you can at least get that fixed (on both boards)

Getting access to another display to even test things would be the only issue which might be difficult. You may need to get that first.

27" LCD Assembly Apple P/N 661-5970

Dan さんによる2020年7月20日

@danj0211

I replaced the logic board and got a new display and it blew the same l9000 inductor again. I really don't know at this point what is doing that. Any insights would be helpful. Thanks

Davinder singh さんによる2020年8月28日

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So I should buy a new logic board and lcd panel Bcz I don’t have the skills to solder. — Davinder singh
Thats a very expensive repair! Have you checked for a local repair shop? Where do you live? Country & nearest city. — Dan
I live in Prince Edward Island canada. My city is Charlottetown. — Davinder singh
Wow! Well isolated from COVID (hopefully)

The nearest shop I can find is in Moncton, NB Cell Phone Repair See what then can do for you. They should have the needed skills and getting the needed inductor shouldn't be difficult. So you can at least get that fixed (on both boards)

Getting access to another display to even test things would be the only issue which might be difficult. You may need to get that first.

27" LCD Assembly Apple P/N 661-5970 — Dan
@danj0211

I replaced the logic board and got a new display and it blew the same l9000 inductor again. I really don't know at this point what is doing that. Any insights would be helpful. Thanks — Davinder singh

iMac Intel 27インチ EMC 2429

L9000 lcd power connector blown on old and new logic board?

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