Sometimes a good old-fashioned hard restart is all it takes to fix all kinds of MacBook issues. Still no luck? Then try a forced reset and then start up from macOS Recovery. Once you're screen is back, it's worth running Disk Utility to repair any errors (Image credit: Apple / Future) If you definitely have power, but your MacBook isn't starting up, make sure it's disconnected from anything other than your charging cable and adapter. Peripheral devices like printers, keyboards, external drives, mice and trackpads can all cause potential start up problems. Hit F2 or use the control bar to try increasing the brightness on your MacBook Pro. It’s also possible that you (or your cat) might have unintentionally hit the brightness keys on the keyboard at some point at that you screen is simply dimmed. Check the power indicator light shows so you can rule out a faulty power cable. If you're running on battery, connect your laptop to its charger just in case the battery has run down. It can be a massive relief to discover the issue is something as simple as this. Or third parties mess with worthless boards to perfect a specific repair, for example the dGPU repairs.This might seem obvious and you've probably already done it, but just to be sure, do check the power and brightness controls. Generally complex boards are reworked using prep instructions from the manufacturer, who has intimate knowledge of the the entire board and optimal rework temps. I've seen people try to rework such boards and scratch their heads why they can't get the component off or worse still pull a few pads offĮven if you find someone who is able to do it, it will be at your own risk and thats because there is a good chance the board will be toast by the end of the process. If you tried to do it without such equipment, you'd find the board would suck away the heat preventing the solder from melting. Very careful local and overall temp control is imperative, in other words it can't be done by hand and needs an expensive rework machine/etc. You then need to heat the component to be removed, ball up the new component, clean up the pads and place the new component. You'll also have to ensure everything is kept very stable as obviously joints become less stable, even if the solder is still below reflow temp. Before you do this you'll have to remove any components/plastics/etc that can't survive this base temp.
With a large complex logic board, BGA chips/etc you will find you will need to raise the temp of the entire board considerably. When you have free pads to play with and a smaller less complex board, free hand rework is possible.
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