Re: Macbook 820-3787 Backlight Not Working

Hi,

I just read online that L8300 typically blows if the LCD screen, LCD screen cable, or LCD connector short to ground. The advice is to check pins 28/29/30 of the LCD connector with the LCD plugged in. Low resistance means it would blow again.

I do get low resistance from these pins, so I think I have answered my own question that I should replace the LCD connector.

Re: Macbook 820-3787 Backlight Not Working

There is an image. When I sign a torch behind the apple logo on the laptop, I can see a dialogue box open.

I will replace L8300.

Do you think the connector is bad, or do you think it is finding a short through the L8300?

Apologies for the use of a comma on numbers, this is a habit of mine. You are correct that when I use a comma, I am separating thousands and not decimals. So yes, the resistance on the capacitors is 167 kilohms. I will edit the original post.

Re: Macbook 820-3787 Backlight Not Working



Hi,

Yes, I have all those schematics and board views. I'm hoping for some input no interpreting the data I have.

Apologies, electrical is a weak area for me....

Re: Macbook 820-3787 Backlight Not Working

Here are some images of the area...

Hello All,

I'm quite new to this kind of this, Im just a lowly Process Engineer, so I am hoping you all can help me.

I have been googling and researching for a day, and have discovered the relevant information I need to troubleshoot my 820-3787 motherboard backlight.

So, here is some information which I hope you all can use to point me int he direction of a solution.

When I check the back light capacitors, I get the following resistence:

C7719/ 7716/ 7717/ 7715/ 7718 - 167 kilohms without screen connected. 83 kilohms with screen...

Re: New Members - please post your introductions here

Hello,

I am new and trying to fix my Macbook. I will post a new thread with the information I have gathered once I am allowed