Macbook Pro No Backlight Repair A1708

This week we have received this Macbook Pro for a No Backlight Repair A1708.

Macbook would turn on with a response from the Capslock, however, there is no backlight on the screen. With light shining through the screen, we could see a faint picture.

Macbook Pro No Backlight Repair A1708
Macbook Pro A1708 Logic Board – No Backlight Repair

With a board taken out of the case, we can see that it is very dusty. There are no signs of any liquid damage or oxidation. The only option left is that it must have been overheating heavily and must have shorted a component.

Macbook Pro No Backlight Repair Process

To repair this board we need to look into the schematics and identify the backlight circuit first. By measuring around the backlight output circuit we could identify a short on the capacitors line.

Challenge is that there is a backlight chip and two rows of filtering capacitors to reduce the 50V boosting voltage ripple. We need to identify where the short is, We can remove the backlight chip as it is not a BGA array and is easy to work with. Then we can see if there is still a short on the board.

Please note: This is not educational material. It is rather a showcase of the services we offer.
Therefore, it should be used as general guidance on what to expect of such repairs.
In case you have a similar device and need the repair, always rely on professionals. These are sensitive electronic devices, and small mistakes may cause irreversible electronic damage. Which may require whole part replacement for 2 or 3 times the cost.

Let’s remove the backlight chip, to prevent misreadings and see if it is visible heat distention on this side of the board.

Macbook Pro No Backlight Repair A1708
Injecting 5V 1.2A into the backlight circuit of Macbook Pro with No Backlight

With the chip removed, there is no prominent heating here under an IR camera, we can check the other side of the board, where we have another row of capacitors.

Macbook Pro No Backlight Repair A1708
Heating spot detected on the capacitors row on Macbook Pro with No Backlight

Looking at the schematics we can see that the component which heats up in that area is a filtering capacitor. By removing it we can confirm that it has an internal short.

Macbook Pro No Backlight Repair A1708
Located faulty component requiring Macbook Pro No Backlight Repair A1708

Here is a short video of how we detected and replaced the faulty part causing this A1708 Macbook Pro to have No Backlight. Thus repairing it successfully.

Finding and Replacing shorted Capacitor causing this A1708 Macbook Pro No Backlight Repair

Successful Macbook Pro No Backlight Repair A1708

Macbook Pro No Backlight Repair A1708
Successful Macbook Pro No Backlight Repair A1708

There we have it, with a removed shorted capacitor, we can now turn on this Macbook properly and the backlight is working perfectly. It is amazing how rigid these chips are to a short circuit. Their internal short circuit prevention system kicks in sometimes just fine and preserves the chip from needing replacement. This saved us 2 months in waiting for chip delivery, with the only replaced component being a 22uF 100V capacitor.

Macbook Pro No Backlight Repair A1708
Shorted Capacitor on Macbook Pro No Backlight Repair A1708

Unbelievable how a small component like this can bring the whole 50V line down by shorting it. Hence causing Macbook Pro No Backlight Repair A1708.

Do you need this Repair in Adelaide?

If your Apple Mac or Macbook is causing trouble and need a Macbook Repair Service in Adelaide, give us a call, and we will advise on the best scenario to get your device repaired.

Interstate? Why not Send IT for a Repair. Repairs take under three weeks, including forward and backward postage. Contact us to get an idea of cost and turnarounds.

We at IT-Solve, specialise in Apple Mac and electronics repairs. We will do our best to repair your Mac quickly without involving high costs and long waiting times in repair shops. Our average repair takes under a week!

Call us now on 0469317177 or drop us an inquiry via Text us via Whatsapp MessengerWhatsApp or Text us via Facebook MesengerMessenger
Our engineers will respond quickly to your query.

Repaired, not Replaced!

We are committed to reducing e-waste in Australia. How we do it is by educating our customers on the reparability and longevity of their devices, as well as providing affordable Macbook Repairs here in Adelaide.
Although our best intentions and hard work, this is not an easy task. Customers must accept that cost of high-quality electronic repairs, is between a third and half of the price of a new device. However, with the current trend of planned obsolescence in electronic design, we see more and more Macbooks having shorter lifespans. To tackle that, while we do our repairs we target common planned obsolescence engineering design mistakes to ensure we extend the life expectancy of the Macbooks we repair. Check some of our Macbook Repair Cases to get an idea of the process.

That said, if we buy a new one or write it off via insurance, it does not guarantee that the new one will not meet the same fate as the older one pretty soon.
As matter of fact, quite often we see accidents reoccurring within less than 2-year gaps. If we can save 2000$ or even 1000$ today by repairing our faulty Macbook is brilliant. That’s an extra half Macbook cost ready to be spent on another one when the time comes or our need for performance increases.
When that time comes is up to us to buy a new one or keep pushing the one we have, but delaying it by a year or three is always a good starting point and saves another abandoned Macbook from polluting our one and only Planet.