{"id":1954,"date":"2017-04-22T00:00:00","date_gmt":"2017-04-22T00:00:00","guid":{"rendered":"http:\/\/192.168.2.19:8666\/?p=1"},"modified":"2024-09-18T16:39:56","modified_gmt":"2024-09-18T08:39:56","slug":"troubleshooting-guide-macbook-pro-not-powering-on","status":"publish","type":"post","link":"https:\/\/rewa.tech\/it\/troubleshooting-guide-macbook-pro-not-powering-on\/","title":{"rendered":"Come risolvere il problema dell'accensione del MacBook Pro"},"content":{"rendered":"

“Every day starts, my eyes open and I reload the program of misery.<\/p>\n

I open my eyes, remember who I am, what I’m like, and I just go, \u2018Ugh’.\u201d<\/p>\n

You may have heard this famous sentence from a popular TV show or read it in a daily newspaper.<\/p>\n

We human beings start a day from opening our eyes, whereas computers start their day with the power button on their body.<\/p>\n

It is well known that Macs are well built and for the most part reliable.<\/p>\n

Still, they are computers and computers need to wake up before getting to work.<\/p>\n

However, we’ve noticed a number of “My MacBook Pro won’t turn on” posts, and solutions are not so easy to be found.<\/p>\n

Theoretically speaking, \u2018MacBook Pro won’t turn on\u2019 problem usually relates to one of two things.<\/p>\n

Either the display is malfunctioning, which means the computer is on, and you just can\u2019t see that it is.<\/p>\n

Or there is some kind of power-related issue that is preventing it from turning on as expected.<\/p>\n

REWA LAB has been working on MacBook repair these days, and in this tutorial, we look at the steps you need to take to fix your MacBook Pro 13″ A1278<\/span> \u00a0if it won’t turn on when pressing the power button.<\/p>\n

Power Button Power Up<\/h3>\n

TestingPower button\u00a0power up-failed. Plug in AC power adapter\u00a0to power up- successful.<\/p>\n

\"Fix<\/p>\n

Keyboard And Trackpad TestingKeyboard and Trackpad no function.<\/p>\n

\"Fix<\/p>\n

Preliminary\u00a0<\/strong> DiagnosisTrackpad and keyboard module broke down.<\/p>\n

Smontaggio del MacBook<\/h3>\n

Disassemble the MacBook and disconnect flex cables. Remove screws and detach the motherboard. Then remove the memory.<\/p>\n

\"DiagnosisTrackpad<\/p>\n

Motherboard Superficial Inspection<\/h3>\n

Motherboard superficial inspection with the help of a handheld magnifier.<\/p>\n

\"Motherboard<\/p>\n

Maintenance Drawing<\/h3>\n

ReferringRoll out the maintenance bitmap and the circuit diagram for reference.<\/p>\n

Roll out Motherboard framework drawing and motherboard power system architecture afterward.<\/p>\n

\"Maintenance<\/p>\n

Motherboard Voltage Testing<\/h3>\n

Locate voltage 12.56 V, common point voltage 3.42V, voltage 5V, voltage 3.3V, voltage 1.5V, voltage 1.0V, voltage 0.9V, voltage 1.1V.<\/p>\n

Connect AC adapter and test them with a digital multimeter – all display normal value.<\/p>\n

\"Motherboard<\/p>\n

Disconnect AC adapter and install the memory. Then connect AC adapter and test, voltage value jumps from 1.1V to 0.8V- normal circuit.<\/p>\n

\"Disconnect<\/p>\n

Resistance Testing<\/h3>\n

Test keyboard port pins and peripheral component value with diode mode.<\/p>\n

Then connect AC adapter and test keyboard port power supply voltage with a digital multimeter.<\/p>\n

Resistor R5704.1 displays no voltage (3.3V under normal circumstances).
\"Resistance<\/p>\n

Diagnosi<\/p>\n

Analyze with the help of maintenance bitmap and circuit diagram – U5701 broke down.<\/p>\n

U5701 IC Replacing<\/h3>\n

Use a metal plate to protect keyboard port from high temperature, then take down the damaged U5701 IC with hot air gun.<\/p>\n

Apply some BGA paste flux to the bonding pad\u00a0and align the new IC with a hot air gun.<\/p>\n

\"DiagnosisAnalyze<\/p>\n

After that, test R5704.1 with digital multimeter again – 3.3V (normal value).<\/p>\n

Assemblaggio e collaudo<\/h3>\n

Assemble the MacBook. Power button\u00a0power up-failed. Plug in AC adapter to power up- successful.<\/p>\n

\"After<\/p>\n

Keyboard and Trackpad work normally.<\/p>\n

\"Keyboard<\/p>\n

Diagnosi<\/h3>\n

Keyboard power button no response – keyboard need to be replaced.<\/p>\n

Keyboard Replacing<\/h3>\n

Disconnect flex cables and detach the motherboard.<\/p>\n

Then detach the old keyboard and install a new keyboard.<\/p>\n

\"DiagnosisKeyboard<\/p>\n

Assemblaggio e collaudo<\/h3>\n

Assemble the MacBook. Power button\u00a0power up-successful. Keyboard and Trackpad work normally.<\/p>\n

\"Assembling<\/p>\n

Final Fault Diagnosis<\/h3>\n

Keyboard and motherboard IC broke down resulting in the ‘not turning on’ problem.<\/p>\n

Click to watch the video of MacBook Pro Won’t Turn on:<\/strong><\/p>\n