How To Fix MacBook Pro Won't Turn On

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<p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">When your Macbook doesn’t turn on, your first guess should be your Mac has run out of battery. If it’s not the case, you need to search more other reasons. We might have browsed a series of posts or threads like MacBook Pro No Power on;&nbsp;MacBook Power Key Not Working; MacBook won’t turn on etc.. This problem usually relates to one of two things. Either the display is malfunctioning, which means the computer is on, and you just can’t see that it is, or there is some kind of power-related issue that is preventing it from turning on as expected. 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”&nbsp;A1278 if it won’t turn on when pressing the power button.&nbsp;</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Detail steps to teach you <strong>How to fix your MacBook Pro or Air won&#39;t turn on</strong>:</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">1.Power Button Power Up Testing</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Power button power up-failed. Plug in AC adapter to power up- successful.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"></span></p><p style="text-align: center"><img src="/../../../../media/file79071524022301.jpg" width="650" height="340" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p style="text-align: justify;"><br/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">2.Keyboard And Trackpad Testing</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Keyboard and Trackpad no function.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"></span></p><p style="text-align: center"><img src="/../../../../media/file19641524022340.jpg" width="650" height="340" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif;">&nbsp;</span><br/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Preliminary Diagnosis</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Trackpad and keyboard module broke down.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">3.MacBook Disassembling</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Disassemble the MacBook and disconnect flex cables. Remove screws and detach the motherboard. Then remove the memory.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"></span></p><p style="text-align: center"><img src="/../../../../media/file87271524022360.jpg" width="650" height="340" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif;">&nbsp;</span><br/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">4. Motherboard Superficial Inspection</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Motherboard superficial inspection with the help of a handhold magnifier.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: center"><img src="/../../../../media/file79711524022376.jpg" width="650" height="340" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p><span style="font-family: arial, helvetica, sans-serif; text-align: justify;"><br/></span></p><p><span style="text-align: justify; font-family: arial, helvetica, sans-serif; font-size: 16px;">5. Maintenance Drawing Referring</span></p><p><span style="text-align: justify; font-family: arial, helvetica, sans-serif; font-size: 16px;">Roll out the maintenance bitmap and the circuit diagram for reference. Roll out Motherboard framework drawing and motherboard power system architecture afterwards.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: center"><img src="/../../../../media/file57561524022407.jpg" width="650" height="599" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">6.Motherboard Voltage Testing</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">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. Connect AC adapter and test them with digital multimeter - all display normal value.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: center"><img src="/../../../../media/file66651524022436.jpg" width="650" height="340" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Disconnect AC adapter and install the memory. Then connect AC adapter and test, voltage value jumps from 1.1V to 0.8V- normal circuit.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: center"><img src="/../../../../media/file14071524022453.jpg" width="650" height="340" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">7.Resistance Testing</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Test keyboard port pins and peripheral component value with diode mode. Then connect AC adapter and test keyboard port power supply voltage with digital multimeter. Resistor R5704.1 displays no voltage (3.3V under normal circumstances).</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: center"><img src="/../../../../media/file30541524022474.jpg" width="650" height="340" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Diagnosis</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Analyze with the help of maintenance bitmap and circuit diagram <span style="font-size: 14px; font-family: 宋体;">– </span><span style="font-size: 14px; font-family: Calibri;">U5701 broke down.</span></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">8.U5701 IC Replacing</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Use a metal plate to protect keyboard port from high temperature, then take down the damaged U5701 IC with hot air gun. Apply some BGA paste flux to the bonding pad and align the new IC with hot air gun.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: center"><img src="/../../../../media/file90911524022490.jpg" width="650" height="340" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">After that, test R5704.1 with digital multimeter again – 3.3V (normal value).</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">9.Assembling and Testing</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Assemble the MacBook. Power button power up-failed. Plug in AC adapter to power up- successful.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: center"><img src="/../../../../media/file87451524022506.jpg" width="650" height="340" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Keyboard and Trackpad work normally.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: center"><img src="/../../../../media/file91751524022734.jpg" width="650" height="340" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Diagnosis</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Keyboard power button no response&nbsp;&nbsp;– keyboard need to be replaced.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">10.Keyboard Replacing</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Disconnect flex cables and detach the motherboard. Then detach the old keyboard and install a new keyboard.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: center"><img src="/../../../../media/file67831524022773.jpg" width="650" height="340" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">11.Assembling and Testing</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Assemble the MacBook. Power button power up-successful. Keyboard and Trackpad work normally.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">&nbsp;</span></p><p style="text-align: center"><img src="/../../../../media/file47741524022791.jpg" width="650" height="340" title="How To Fix MacBook Pro Won&#39;t Turn On"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;"><br/></span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">12.Final Fault Diagnosis</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Keyboard and motherboard IC broke down resulted in the &quot;not turning on&quot; problem.</span></p><p style="text-align: justify;"></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Tools Used:</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Multimeter: </span><a href="https://goo.gl/PnihJ7" target="_self" style="text-decoration: underline; font-family: arial, helvetica, sans-serif; font-size: 16px;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">https://goo.gl/PnihJ7</span></a></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Screw Driver: </span><a href="https://goo.gl/PnihJ7" target="_self" style="text-decoration: underline; font-family: arial, helvetica, sans-serif; font-size: 16px;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">https://goo.gl/CO9NBt</span></a></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Tweezers: </span><a href="https://goo.gl/PnihJ7" target="_self" style="text-decoration: underline; font-family: arial, helvetica, sans-serif; font-size: 16px;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">https://goo.gl/4tvhmH</span></a></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Hot Air Gun: </span><a href="https://goo.gl/PnihJ7" target="_self" style="text-decoration: underline; font-family: arial, helvetica, sans-serif; font-size: 16px;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">https://goo.gl/oHf064</span></a></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Soldering Iron: </span><a href="https://goo.gl/PnihJ7" target="_self" style="text-decoration: underline; font-family: arial, helvetica, sans-serif; font-size: 16px;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">https://goo.gl/omxvSa</span></a></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">BGA Paste Flux: </span><a href="https://goo.gl/PnihJ7" target="_self" style="text-decoration: underline; font-family: arial, helvetica, sans-serif; font-size: 16px;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">https://goo.gl/1kFjMf</span></a></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Anti - static Glass Wiper : </span><a href="https://goo.gl/N5mrA6" target="_self" style="text-decoration: underline; font-family: arial, helvetica, sans-serif; font-size: 16px;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">https://goo.gl/N5mrA6</span></a></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">Solder Wire: </span><a href="https://goo.gl/N5mrA6" target="_self" style="text-decoration: underline; font-family: arial, helvetica, sans-serif; font-size: 16px;"><span style="font-family: arial, helvetica, sans-serif; font-size: 16px;">https://goo.gl/TqVf9b</span></a></p><p><br/></p>