Gadgets Fix all Motherboards.
The logic board of every Apple laptop or desktop computer is the main circuit board where components interact with each other. This maintains the normal function of the computer. With a logic board failure, we can expect a loss of communication within the device, and eventually a system crash. The CPU, the brain of the computer, can’t send signals through the logic board, the nerve center, to the rest of the system.
This kind of failure can cause complete system failures that can make it very hard to test for. Logic board failure is known as one of the hardest things to diagnose and repair. It involves a lot of thorough testing and delicate parts to navigate through. In this guide, we will go through the main causes of logic board failure, and what you can do for your Apple laptop or desktop Mac.
Logic board vs motherboard
There is no actual difference in function between logic boards and motherboards. The term logic board is just the name for motherboard, coined by Apple. Apple may have certain specifications that fit them for only Apple computers, but as most motherboards are unique to each device, it doesn’t make logic boards any different to motherboards.
The cause of logic board failure
It’s an easy mistake to make. Knocking over a drink or any liquid on a laptop can be a scary thing to face, as the delicate computer hardware could get ruined. When the liquid gets into the inside of a laptop computer, the first thing to go would be the logic board, sometimes the keyboard will get damaged as well. The connecting points on the logic board will stop working from the liquid, and this can cause the eventual failure of the entire board.
Don’t panic if you find yourself in a laptop liquid spill accident. The first thing you should do is to remove the laptop from its power source. Don’t try to clean it off with things like a hairdryer either! Unprofessional cleaning treatment like that can cause possible further damage to other parts of the computer. See liquid damage
Overheating is bad for the entire computer in general. All parts of the computer, especially the logic board, need efficient cooling for the entire computer to work smoothly. The CPU and video card often draw a lot of power and generate a lot of heat. Your computer’s cooling system then disperses this heat generated for a suitable internal temperature.
If this heat is not dispersed quickly, the system will overheat. This can cause connecting points or parts of the logic board to warp, which will result in a logic board failure. Inefficient heat dispersion can be caused by large dust build up, or a faulty cooling fan
What a faulty logic board can look like
Sometimes the damage on the logic board isn’t visible enough to see, this kind of damage can also reflect on your computing experience.
When a logic board does fail, components lose their channels of communication and can’t interact with each other. This majorly affects how the computer works. It can generally lead to unexpected system crashes, or a complete system failure
Certain signs of a faulty logic board
There are some sure signs of a faulty logic board that you may come across. A part of the logic board is called the “system management controller” and it can be tested with Apple Diagnostics. If Apple Diagnostics reports errors with the system management controller, it’s a logic board issue
Or, if you find that the USB ports next to the HDMI / MIDI ports aren’t working, you could also have a logic board issue. The video ports are directly connected to the logic board, and any failure that area could affect the connectivity of ports and components.
For Macbook Air and Macbook Pro users, an incredibly dim screen could also be a logic board failure sign. This is a dimmed screen that you can’t turn back on and would need a torch to shine on it to see things. The LED screen of Macbook Air and Macbook Pro laptops are controlled by the logic board, so a logic board failure might affect the screen’s brightness
How to test your logic board for issues
We’ve mentioned briefly above about testing the logic board by method of eliminating other issues. This involves testing the RAM and video card, and the hard drive, if needed.
It also depends on whether your computer passes POST (Power-On Self Test). When you start your computer, the system goes through POST. This tests things like CPU, memory, and network interfaces. If the computer hardware passes POST successfully, you’ll get to the Apple logo splash screen or a light gray background.
4 tips to check
- Testing Hard drive
- Testing Ram
- Testing GPU
- Check the fan
- check the Bios