Macbook Air Backlight Repair

Repairing Macbook Air with backlight issues caused by liquid damage

Macbook we have received this week was sent to us from interstate and had issues with its backlight. The customer called us early last week and described the issue he was facing.
By listening to customer’s explanations of the issue, we were well aware of what may have been causing it. Hence we able to give him a quote for the repair over the phone. As a result, he felt confident in our abilities and cost for the repair and sent his Macbook Air to repair here in Adelaide.

When the Macbook arrived, we could see that there was a dim picture on the screen but no backlight. So this Macbook Air needed a repair of the backlight circuit.

Check our other cases of Macbook Backlight Repairs

Apparently, there was liquid damage on this Macbook. It was intense, particularly around the screen connector and one of the voltage regulators.
We could even see how the LVDS screen connector’s power lines were burned out. So we knew this would be a challenging Macbook Air Backlight Repair.

Heavy corrosion around screen cable on Macbook Air with no Backlight
Heavy corrosion around screen cable on Macbook Air with no Backlight

We do stuff differently here. For example, rather than replacing the whole logic board, we measure components and identify faulty chips. And we are not scared of doing a bit more extra work to reduce the cost to the customer. Most importantly, though, reducing e-waste is our commitment to the planet.

IT-Solve

Although, there is a fuse to protect from shorting screen connector damaging the backlight chip (little component marked with P). In this case, it seemed like the short was intense and burned the backlight chip together with the fuse itself.

Macbook Air Backlight Repair Process

Repairing LVDS connector pins and resoldering the components to treat corrosion
Repairing LVDS connector pins and resoldering the components to treat corrosion

We dive straight onto the repair. As it took a couple of days for the Macbook to arrive from interstate, we knew that we had to fix it asap. So the customer can have it back quickly.

Blown fuse in a Macbook Air Backlight Repair

First, we have started treating the heaviest part of the damage and resoldering the screen connector’s components. As well as the screen connector itself – the dark spot on the photo.

Replacing burned fuse of Macbook Air with no Backlight on screen

We have a sophisticated equipment workshop with high accuracy microscope, ultrasonic cleaning bath, reflow machine and tools for micro soldering to achieve high-quality logic boards repairs. With hundreds of components in stock, we quickly located and replaced the faulty resistors and capacitors in the area.

After cleaning the oxidation and replacing a couple of heavily corroded capacitors, we measured the fuse – it was also blown. So we went ahead and replaced the fuse too.

Shorted Screen Connector on Macbook Air Backlight Repair

Shorting screen connector of Macbook Air A1466

We knew a big bang around the screen’s power lines, basing on the damage on the LVDS screen connector. But an unexpected short came from the display’s connector, which also showed traces of short on the power line.

This would have increased the repair cost drastically, due to now we would have the cost of a new replacement screen too. But we had a better idea, to try to repair the connector instead of replacing the screen.

This is what to expect if you need Macbook Backlight Repair Service in Adelaide

  1. Quote for the repair before any work is done, even over the phone.
  2. Free pick up from the client’s location in Adelaide. Alternatively, drop in for a quick check while you wait.
  3. Confirming final cost and “Go” from the client.
  4. Repairing and ensuring everything works as expected.
  5. Returning repaired system to the client. Or the client can pick it up from our workshop.

We discussed this issue with the customer and offered him either to repair or replace the screen for an additional cost. He agreed to have it repaired instead. Otherwise, the new screen would have cost him $600.

Repairing shorting pads on Macbook Air screen connector

Looking at the pads, apparently, heat generated in that area due to the short on the LVDS connector. This caused the isolation to melt between the pads and the bottom of the connector, which is ground.

As this metal ground was wide enough, we could modify the connector to avoid the pads shorting. We also applied some Kapton tape there to avoid any future shorts.

Removed short on a Macbook Screen connector

Once screen connector pads were repaired, we could test if the short was gone and concentrate on the remaining of the Macbook Air Backlight Repair.

Testing repaired connector for short on Macbook Air with Backlight issues

Once, a major expense was avoided we continued with the rest of the issues.

Faulty Backlight Controller Chip causing Macbook Air Backlight Repair

Even with the repaired connector and replaced the fuse, the screen power lines were not producing enough voltage to turn on the backlight of the screen.

Macbook still had a dim picture on the screen and needed further repairs. So the next stop on the schematic was to replace the backlight chip on this Macbook Air with no backlight.

BGA array LP8550 backlight chip on Macbook Air
BGA array LP8550 backlight chip on Macbook Air
Unsoldering Backlight chip on Macbook Air with Amtec flux
Unsoldering Backlight chip on Macbook Air with Amtec flux
Replacing LP8550 Backlight chip on Macbook Air A1466
Replacing LP8550 Backlight chip on Macbook Air A1466

The last step was to run the logic board on an ultrasonic cleaner. This to ensure there is no more residue around other components of the logic board.

If you have a Macbook with a black or dim screen and need Macbook Air Backlight Repair, always rely on professionals.
These are expensive computers, and small mistakes may cause you a fortune. In addition, apple electronics are susceptible to ESD, and any mishandling may result in a damaged logic board.

Successful Macbook Air Backlight Repair

Successfully repaired Macbook with no backlight issue caused by liquid damage.

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 of what to expect of such repairs.

Call us today for your Macbook Repair in Adelaide

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

We at IT-Solve, specialise in computer and electronics repairs. And we will do our best to quickly repair your computer without involving high costs and long waiting times in repair shops.

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 question.