{"id":1999,"date":"2017-12-07T00:00:00","date_gmt":"2017-12-07T00:00:00","guid":{"rendered":"http:\/\/192.168.2.19:8666\/?p=1"},"modified":"2023-12-12T15:08:04","modified_gmt":"2023-12-12T07:08:04","slug":"macbook-air-wont-turn-on-troubleshooting","status":"publish","type":"post","link":"https:\/\/rewa.tech\/it\/macbook-air-wont-turn-on-troubleshooting\/","title":{"rendered":"Risoluzione dei problemi del MacBook Air che non si accende"},"content":{"rendered":"<p>MacBook Air won\u2019t turn on&nbsp;repair can be seen as one comprehensive fault case with high difficulty. And MacBook Air won\u2019t turn on&nbsp;issue caused by cockroaches? Have you ever come across? Today we will introduce a series of diagnostic and repair techniques regarding MacBook Air A1466 (Mid-2013) won&#8217;t turn on the issue. The solution covers both fault diagnosis by measurement of voltage, current and resistance, and the replacing of resistor, inductor and IC. Surely you will get surprised.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/de5963b7-c0f4-4f16-af3a-3429c0cf8bc6-1.jpg\" alt=\"\" title=\"\"><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<h2 class=\"wp-block-heading\">Parti e strumenti necessari<\/h2>\n\n\n\n<details class=\"wp-block-details accordion-head is-layout-flow wp-block-details-is-layout-flow\" open><summary>Parts And Tools<\/summary>\n<ul class=\"wp-block-list\">\n<li><a style=\"color: #0000ff;\" href=\"https:\/\/shop.rewa.tech\/detail\/integrated-mobile-phone-repair-platform-gold-oem-new.html\" target=\"_blank\" rel=\"noopener\">Piattaforma di manutenzione<\/a><\/li>\n\n\n\n<li><span style=\"color: #0000ff;\">Saldatore<\/span><\/li>\n\n\n\n<li><span style=\"color: #0000ff;\">Cacciaviti<\/span><\/li>\n\n\n\n<li><a style=\"color: #0000ff;\" href=\"https:\/\/shop.rewa.tech\/detail\/nylon-spudger-anti-static-pry-bar-oem-new.html\" target=\"_blank\" rel=\"noopener\">Plastic&nbsp;Pry Bar<\/a><\/li>\n\n\n\n<li><a style=\"color: #0000ff;\" href=\"https:\/\/shop.rewa.tech\/list\/apple-replacement-parts\" target=\"_blank\" rel=\"noopener\">Ricambi per MacBook<\/a><\/li>\n<\/ul>\n<\/details>\n<\/div>\n<\/div>\n\n\n\n<p>Risoluzione dei problemi del MacBook Air che non si accende<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Phenomenon<\/h2>\n\n\n\n<p>Plug in AC adapter, the power light won\u2019t turn on.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/fb799f96-cfa8-4b78-b801-fefe58374f99-20171206151420.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>The DC Power Supply&nbsp;also displays abnormal standby current. Normal current should be 0.8A.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/8b47615c-9d6b-4f33-adf8-42981af9e577-20171206151525.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Disassembling<\/h2>\n\n\n\n<p>Disassemble the&nbsp;Mac&nbsp;and&nbsp;Remove the lower case. Traces of cockroaches&nbsp;all around (which caused corrosion).<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/f19c1b29-1f3e-4416-bbbd-21ff9aef58b7-20171206151624.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Disconnect the battery&nbsp;and Remove the SSD&nbsp;module. Confirm the number of logic board, 820-3437-B. Detach the logic board. Active cockroaches can also be seen on the logic board (which caused corrosion).<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/5f12a7f4-c389-490b-ba48-618297b0dced-20171206152105.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p><strong>Warm tips: clean the logic board thoroughly after completion of repairing<\/strong><\/p>\n\n\n\n<p>Detach IO Board as well and then attach it to the logic board.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/20cbefa8-8566-4f9c-9f78-da3ade1d872a-20171206152909.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Diagnosing And Repairing<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Phase 1<\/strong><\/h3>\n\n\n\n<p>Get the Multimeter&nbsp;Prepared&nbsp;at resistance mode. Measure the resistance value of logic board power supply inductors. The value is normal.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/ca8368fc-76d5-4c54-b452-f86ba7343774-20171206154428.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Switch to voltage mode. Plug in AC adapter&nbsp;and measure the voltage value of standby circuit inductor. The voltage value is way lower than normal.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/22e1a7c5-bf24-4ca8-bd1a-4675eb673765-20171206154548.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Locate the inductor withdrawing and bitmap&nbsp;and confirm the circuit diagram of L7095.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/ba61f68c-be4c-4deb-9553-4e43c971a199-20171206154703.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/0b5c1a9a-2a4c-4f3c-86e1-7ca06ae45b64-20171206154807.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Measure the voltage value of&nbsp;IC working condition. The working condition is normal.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/4f2a9d3b-d85f-4272-ba25-fb400651abb2-20171206154955.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Switch to resistance mode&nbsp;and measure the feedback resistance value of IC. The output working condition of inductors should be Vout=1.25V*(1+Ra\/Rb). The resistance value is way larger than normal.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/31c81c33-bed1-48ba-9284-cc1228ea8e19-20171206155107.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p><strong>So we need to replace with new resistors.<\/strong><\/p>\n\n\n\n<p>Detach new resistors from the spare plate&nbsp;and solder them to the target board. Then measure the resistance value of resistors replaced. The resistance value of R7095 is 200K\u03a9, R7096&nbsp;160K\u03a9. Which is normal.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/0dbedb55-6bef-4e3f-a392-81c88fd0e476-20171206155329.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Plug in AC adapter. The power light turns&nbsp;on&nbsp;this time.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/96fd7953-33a8-470a-b901-165ab59ca0c7-20171206155517.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Measure the voltage value of inductor L7095, 3.41V. Normal voltage value.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/e9385815-0584-4a85-b1f7-fdbc1113f424-20171206155541.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Check the current of DC Power Supply. The current is abnormal. Which indicates that the MacBook still cannot be powered up.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/b369f2d3-5f5e-4923-b2fc-038e4fdbb1a5-20171206155640.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Phase 2<\/strong> <\/h3>\n\n\n\n<p>Measure the voltage value of power supply inductor. The voltage value is erratic.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/9d289856-ba69-4c09-95fb-daf380cb8980-20171206155715.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Locate the inductor withdrawing and bitmap&nbsp;and confirm the power supply circuit of L7560.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/797dd134-c38f-4232-a94d-a76cedbcd24e-20171206155815.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/37bc9fff-be27-42b0-b3f2-7b08b60dd0ae-20171206155936.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Measure the voltage value of&nbsp;IC working condition. Pin 23, 8.55V. Pin 29, 4.97V. Pin 22, 3.28V. Pin 21, 3.3V. Pin12, 3.3V. The voltage value of pin 13 and pin 26 is erratic.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/e4628800-6a43-4440-81c3-8472839f7c57-20171206160052.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>We have a suspicion that the power supply IC broke down. <\/p>\n\n\n\n<p><strong>So we need to replace with a new power supply IC<\/strong>.<\/p>\n\n\n\n<p>Detach a new power supply IC from the spare plate&nbsp;and solder the power supply IC to the target board. Clean the logic board after cooling.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/f856ae72-47f5-4b95-912f-48d428b1b8a9-20171206170915.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Plug in AC adapter&nbsp;and check the current. The current is just the same as before (with the original power supply IC). The fault hasn\u2019t been cleared.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/8ea3f43c-7248-48da-821f-0318b4241ce1-20171206171007.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Phase 3<\/strong><\/h3>\n\n\n\n<p>Measure the voltage value of logic board&nbsp;again. The voltage value of Pin 26 is erratic. So we need to confirm the power supply circuit of pin 26. Roll out the maintenance&nbsp;drawing and bitmap&nbsp;and Locate R7564.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/518510b4-1a95-4839-81d3-13853432917c-20171206171234.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Disconnect AC adapter&nbsp;and switch to resistance mode. The measured resistance value of R7564 is 1M\u03a9. Which is abnormal.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/782f713b-20ab-443e-a7c4-990f65f7b291-20171206171308.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p><strong>So we need to replace with a new resistor<\/strong>.<\/p>\n\n\n\n<p>Detach a new resistor from the spare plate&nbsp;and solder it to the target board. Clean the logic board after cooling.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/6be2c119-0656-4137-a85f-3aa74e52443f-20171206171352.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Measure the resistance value of R7564&nbsp;again. The measured resistance value of R7564 is 0.5M\u03a9. Which is normal. Plug in AC adapter&nbsp;and check the current. Normal current this time.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/3b553145-b129-4100-9a75-9bd6fa896346-20171206172830.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Measure the voltage value of resistor R7564. Normal voltage value.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Test<\/strong><\/h2>\n\n\n\n<p>Get the logic board mounted&nbsp;and turn on&nbsp;the MacBook. The MacBook powered up with&nbsp;a normal display.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/e77d6593-0c31-4bc2-80cb-b103525d9207-20171206173146.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>Assemble the MacBook and test. The fault has been cleared.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/50e3c507-c481-4467-9686-66ba5b5e12b8-20171206173407.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p>We can finish the <strong>MacBook Air won&#8217;t turn on&nbsp;<\/strong>repairing work by getting&nbsp;the MacBook full assembled. And do you want to&nbsp;MacBook air ram upgrade, you can read this post.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/s.rewa.tech\/image\/795d4899-1199-4436-b2fe-5fe94f1419f9-20171206173513.jpg\" alt=\"MacBook Air Won&#039;t Turn On Troubleshooting\" title=\"\"><\/figure>\n\n\n\n<p><strong>For more details on MacBook Air won&#8217;t turn on troubleshooting, please go to&nbsp;<\/strong><a href=\"https:\/\/www.youtube.com\/channel\/UC3ByF8DcZ3yxUs7VP1NOuyA\" target=\"_blank\" rel=\"noopener\"><strong>Canale YouTube di REWA<\/strong><\/a><strong>.<\/strong><\/p>\n\n\n\n<p><strong>Tools Used, for more repair tools please go to <\/strong><a style=\"color: #0000ff;\" href=\"https:\/\/shop.rewa.tech\" target=\"_blank\" rel=\"noopener\"><strong>shop.rewa.tech<\/strong><\/a><strong> per ottenere.<\/strong><\/p>\n\n\n\n<iframe width=\"800\" height=\"465\" src=\"https:\/\/www.youtube.com\/embed\/RjwMNc07Rek?si=3WuTCYLgbUQ4_o-6\" title=\"Lettore video di YouTube\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>","protected":false},"excerpt":{"rendered":"<p>MacBook Air won\u2019t turn on&nbsp;repair can be seen as one comprehensive fault case with high difficulty. And MacBook Air won\u2019t turn on&nbsp;issue caused by cockroaches? Have you ever come across? Today we will introduce a series of diagnostic and repair techniques regarding MacBook Air A1466 (Mid-2013) won&#8217;t turn on the issue. The solution covers both [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2562,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/s.rewa.tech\/image\/2d0f7f84-20a4-4a0d-a60f-17840734f88a-MacBook-Air-Wont-Turn-On-Troubleshooting.jpg","fifu_image_alt":"","footnotes":""},"categories":[17,5,447],"tags":[24,652],"class_list":["post-1999","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-macbook","category-guide","category-troubleshooting","tag-macbook","tag-macbook-air-wont-turn-on"],"_links":{"self":[{"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/posts\/1999","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/comments?post=1999"}],"version-history":[{"count":0,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/posts\/1999\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/media\/2562"}],"wp:attachment":[{"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/media?parent=1999"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/categories?post=1999"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/tags?post=1999"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}