{"id":13145,"date":"2022-06-15T22:54:00","date_gmt":"2022-06-15T14:54:00","guid":{"rendered":"https:\/\/rewa.tech\/iphone-12-pro-max-cpu-micro-soldering-repair\/"},"modified":"2025-01-20T17:27:55","modified_gmt":"2025-01-20T09:27:55","slug":"iphone-12-pro-max-not-booting","status":"publish","type":"post","link":"https:\/\/rewa.tech\/fr\/iphone-12-pro-max-not-booting\/","title":{"rendered":"L'iPhone 12 Pro Max ne d\u00e9marre pas ? Comment r\u00e9parer avec CPU Pad Repair"},"content":{"rendered":"<p>A no-boot issue in an iPhone 12 Pro Max is a challenge for repair technicians, especially when caused by missing CPU pads. This guide explains how to diagnose, repair, and restore functionality to the device by skillfully repairing the CPU pads through wire jumping and other intricate methods.<\/p>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile has-blush-light-purple-gradient-background has-background\"><figure class=\"wp-block-media-text__media\"><img fetchpriority=\"high\" decoding=\"async\" width=\"866\" height=\"1024\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/12_Pro_Max-866x1024.png\" alt=\"iphone 12 pro max\" class=\"wp-image-14900 size-full\" title=\"\" srcset=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/12_Pro_Max-866x1024.png 866w, https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/12_Pro_Max-254x300.png 254w, https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/12_Pro_Max-768x909.png 768w, https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/12_Pro_Max.png 940w\" sizes=\"(max-width: 866px) 100vw, 866px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h3 class=\"wp-block-heading\">D\u00e9tails de l'appareil<\/h3>\n\n\n\n<p><strong>Mod\u00e8le :<\/strong> iPhone 12 Pro Max<\/p>\n\n\n\n<p><strong>Annonc\u00e9 :&nbsp;<\/strong>2020, 13 octobre<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u00e9nom\u00e8ne de d\u00e9faut<\/h2>\n\n\n\n<p><strong>Dispositif<\/strong>: iPhone 12 Pro Max<\/p>\n\n\n\n<p><strong>Sympt\u00f4mes<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>The device was unable to boot.<\/li>\n\n\n\n<li>Previous repair attempts failed.<\/li>\n\n\n\n<li>Customer feedback identified missing CPU pads.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Processus de r\u00e9paration<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Inspection initiale<\/h3>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<ul class=\"wp-block-list\">\n<li>Disassembled the phone and found the motherboard already separated.<\/li>\n\n\n\n<li>Inspected the CPU under a microscope and confirmed repair traces on the pads.<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/01__Received_the_phone_the_mothebroard_has_been_separated_already.png\" alt=\"\" title=\"\"><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Root Cause<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Missing pads on the CPU were preventing proper connections, including three critical and challenging pads located close to one another.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Processus de r\u00e9paration<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Step 1: Remove the CPU<\/h3>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<ul class=\"wp-block-list\">\n<li>Carefully remove the CPU from the motherboard.<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/02__Remove_the_CPU_and_check_under_the_microscope.png\" alt=\"\" style=\"aspect-ratio:1;object-fit:cover\" title=\"\"><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Step 2: Locate the Missing Pads<\/h3>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<ul class=\"wp-block-list\">\n<li>Inspected under a microscope to identify missing or damaged pads.<\/li>\n\n\n\n<li>Removed the solidified UV mask covering the pads.<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/03__some_pads_on_the_CPU_has_been_fixed_before.png\" alt=\"\" style=\"aspect-ratio:1;object-fit:cover\" title=\"\"><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Step 3: Root Identification<\/h3>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<ul class=\"wp-block-list\">\n<li>Patiently scratched the pad areas with a sculpture knife to locate the roots.<\/li>\n\n\n\n<li>Strengthened the roots by applying solder flux and curing with a UV lamp.<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/04__the_3_missing_pads.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/05__remove_the_UV_mask.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/06__After_removing_the_UV_mask__the_root_of_the_pads_cannot_be_found.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/07__keep_slightly_scraching_with_sculpture_knife_till_we_can_see_a_little_pads_as_marked_below.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/09__Root_searching.png\" alt=\"\" title=\"\"><\/figure>\n<\/figure>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Step 4: Prepare for Wire Jumping<\/h3>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<ul class=\"wp-block-list\">\n<li>Cleaned the roots and applied a minimal amount of tin paste to each.<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/10__UV_solidify_the_pads_and_the_roots.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/11__Scratch_out_the_roots.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/13__finished.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/12__Tin_paste.png\" alt=\"\" title=\"\"><\/figure>\n<\/figure>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Step 5: Wire Jumping for Missing Pads<\/h3>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<ul class=\"wp-block-list\">\n<li>Soldered one side of the wire to the roots.<\/li>\n\n\n\n<li>Created a loop on the other side for a secure connection.<\/li>\n\n\n\n<li>Applied a UV mask to stabilize the wires and cured them with a UV lamp.<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/14__Then_lets_jump_wires_like_what_we_do_on_the_motherboard.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/CPU_Repair.png\" alt=\"CPU Repair\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/16__Jump_wire_other_pads.png\" alt=\"\" title=\"\"><\/figure>\n<\/figure>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Step 6: Reball the CPU<\/h3>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<ul class=\"wp-block-list\">\n<li>Re-balled the CPU with solder balls to ensure proper connection with the motherboard.<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/17__Solder_back_the_CPU.png\" alt=\"\" title=\"\"><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Step 7: Reassemble the Motherboard<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Soldered the CPU back to the motherboard and recombined the two motherboard layers using a heating platform.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>R\u00e9sum\u00e9<\/strong><\/h2>\n\n\n\n<p>The issue finally gets fixed by CPU pads jump wire repair. As mentioned, CPU chip missing pad repair requires rich experience, excellent stable handwork, and great patience.<\/p>\n\n\n\n<p>Do more practice and then you can repair similar issues like this with confidence.<\/p>","protected":false},"excerpt":{"rendered":"<p>A no-boot issue in an iPhone 12 Pro Max is a challenge for repair technicians, especially when caused by missing CPU pads. This guide explains how to diagnose, repair, and restore functionality to the device by skillfully repairing the CPU pads through wire jumping and other intricate methods. Device Details Model: iPhone 12 Pro Max [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":13146,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[158,5,13,447],"tags":[258,863,862],"class_list":["post-13145","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-iphone-guide","category-guide","category-how-to","category-troubleshooting","tag-iphone-12-pro-max","tag-iphone-12-pro-max-repair","tag-iphone-12-pro-max-wont-turn-on"],"_links":{"self":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/posts\/13145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/comments?post=13145"}],"version-history":[{"count":0,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/posts\/13145\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/media\/13146"}],"wp:attachment":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/media?parent=13145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/categories?post=13145"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/tags?post=13145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}