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모델 A1286. 2011년 2월 출시 / 2.0, 2.2, 또는 2.3 GHz 쿼드-코어 Intel Core i7 프로세서

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Repeated boot chime and no display

Earlier I had this Artifacts on screen, not sure if LVDS cable loose or GPU issue. I resolved it and MBP was working fine, but now suddenly it won’t boot. I am hearing repeated boot chimes indefinitely and nothing on screen. When it was working I noticed that left shift, 7,8 &9 keys were not working.

I tried to reset SMC & PRAM but not sure if it works(as the left shift wasn’t working earlier). Sometimes it boots with no chime and nothing on display.

I did face this issue when I was trying to solve the Artifacts on screen, not sure if LVDS cable loose or GPU issue issue . Somehow I surpassed it and was able to boot into linux. But I don’t remember what exactly I did.

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I may have missed a small detail which I just noted in your original question (sorry I didn’t catch it sooner)

Your update image was not the internal display it was an external display! That pushes the issue to the logic board not the internal display. That is your systems GPU which is messed up! I haven’t see one react as yours was in the original post, I’ve seen similar display defects from damaged T-CON and LCD panels.

So where are we now?

Sadly, the logic board will need replacing to get the discreet GPU working again. Your only other option is to disable the discreet GPU and only use the intergraded graphics services within your CPU.

There are a few ways you can go about it this is the best Disable MacBook Pro Dedicated GPU

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Yes the discreet GPU isn't working, so in my earlier fix I already disabled the discreet GPU(using the fix you mentioned) and MBP was working fine. But now this issue of repeated boot chimes, why could this happen ?

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What can I say the logic board has gotten worse ;-{

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