what could sensor error on the logic board cause?

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Level 1

5 points

what could sensor error on the logic board cause?

hey everyone, what could sensor error on the logic board cause? because on my screen i have bright colored vertical lines on the screen ONLY!

If I twist the screen (hold the upper left corner and pull the upper left corner down towards the keyboard the lines go away and I have a normal screen.

When i made AHT (Apple Hardware Test ) it gave me back this error (Error 4SNS/1/4000000: TG1H-128).

i just want to make sure which part is causing this problem so i can order that part online, i don't have any near-by apple store/retail.

Thanks,

MacBook Pro, Mac OS X (10.7.4)

Posted on Oct 20, 2012 4:17 AM

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Answer 1

wjosten

Level 10

95,321 points

Oct 20, 2012 4:47 AM in response to barhuma

Unless you have experience in micro soldering on logic boards, you're not gonna be able to fix this. In fact, Apple doesn't fix stuff like this, they replace the logic board & the faulty logic board is sent back to be refurbished.

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Answer 2

barhuma Author

Level 1

5 points

Oct 22, 2012 12:11 AM in response to wjosten

Thanks, but this is not helping me, could sensor error on the logic board cause huge vertical line on the screen?

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Answer 3

Courcoul

Level 6

18,558 points

Oct 22, 2012 1:11 AM in response to barhuma

If you are stating that the problem corrects itself when you warp the screen slightly, wouldn't it be logical to think that the issue is in the screen and not the logic board safely esconced in the rigid aluminum chassis?

If the Mac has not been abused, could be something as simple as a bad cable connecting the screen to the logic board. But with the scant information provided, not much more we can conjecture. We don't have a clue as to what model Mac you're having the problem, how long you've had both the Mac and the problem, what specifics as to the hardware and software, etc.

We're good, but lack in mind reading prowess.

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Answer 4

barhuma Author

Level 1

5 points

Oct 22, 2012 1:27 AM in response to Courcoul

I have a Macbook pro 15" late 2008, 4 GB Ram, 2.4 GHz.... i dropped it once but before 7 months from that drop the huge vertical line started to appear, it was easily disappear when i move the screen back and forth in 1 time or when the mac heat-up, now i do it many times to make it disappear and sometimes i play a movie in full screen and leave it heat-up so the screen goes back to normal. before few days i made an AHT and it gave me back this error (Error 4SNS/1/4000000: TG1H-128) i googled this problem and i found out it's a sensor error on the logic board which made me confuse more. my problem here is that i don't have an apple store in my area and i was thinking of replacing the screen now i'm confused if that was screen or logic board problem!!!

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Answer 5

dmdimon

Level 3

856 points

Oct 22, 2012 2:24 AM in response to barhuma

sensors placed in screen (like ambient light one) are counted still as motherboard sencors.

If you are brave enough - go iFixit.com, see full commented disassembly guide for your model and check yourself - may be just tighten the screen connector would be enough to cure problem. May be not.

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