{"id":13265,"date":"2022-08-14T18:04:00","date_gmt":"2022-08-14T10:04:00","guid":{"rendered":"https:\/\/rewa.tech\/iphone-12-pro-max-wont-turn-on-issue-repair\/"},"modified":"2024-08-05T16:25:12","modified_gmt":"2024-08-05T08:25:12","slug":"iphone-12-pro-max-wont-turn-on-issue-repair","status":"publish","type":"post","link":"https:\/\/rewa.tech\/fr\/iphone-12-pro-max-wont-turn-on-issue-repair\/","title":{"rendered":"Guide de r\u00e9paration du probl\u00e8me de l'iPhone 12 Pro Max qui ne s'allume pas"},"content":{"rendered":"<p>The iPhone 12 Pro Max, announced on October 13, 2020, is a high-end smartphone known for its advanced features. However, a serious drop can cause it to fail to turn on. This guide details the steps to troubleshoot and repair this issue.<\/p>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center has-blush-light-purple-gradient-background has-background 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<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/iPhone_12_Pro_Max_Image.png\" alt=\"\" style=\"width:261px;height:auto\" 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\">\n<h2 class=\"wp-block-heading\">D\u00e9tails du t\u00e9l\u00e9phone<\/h2>\n\n\n\n<p><strong>Mod\u00e8le :<\/strong> iPhone 12 Pro Max<\/p>\n\n\n\n<p><strong>Annonc\u00e9 :<\/strong>\u00a02020, 13 octobre<\/p>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u00e9nom\u00e8ne de d\u00e9faut<\/h2>\n\n\n\n<p>An iPhone 12 Pro Max that has been seriously damaged by a drop may not turn on. In such cases, the following troubleshooting and repair process can be helpful.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Processus de d\u00e9pannage<\/h2>\n\n\n\n<p>First, let&#8217;s connect the motherboard with the DC power supply machine, there&#8217;s no current leakage. But when triggering the boot process by tweezer, the current jump to 1100mA directly.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/01__Trigger_to_boot.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\/02__1100mA_directly.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>Next, let&#8217;s remove the foams around the connectors, and then hold the motherboard on the heating platform to separate the two layers of the motherboard.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/03__Remove_the_foams_around_the_connectors.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\/04__Separate_with_the_heating_platform.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>After separation,&nbsp;not surprisingly, a lot of pads have fallen off, later we need to take a lot of time to fix the missing pads. But anyway, let&#8217;s fix the boot issue first.<\/p>\n\n\n\n<p>When measuring the diode values on the power rails which are outputted from PMU to CPU, find one capacitor around the CPU is shorted to the ground.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/05__When_measuring_with_multimeter_around_the_CPU.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__Find_one_rail_is_shorted_to_ground.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>Refer to the <a href=\"https:\/\/refoxteam.com\/bitmap\" target=\"_blank\" rel=\"noopener\">Refox bitmap<\/a>, it&#8217;s PP1V2_IO.<\/p>\n\n\n\n<p>As we can see, there are many components related to the PP1V2_IO.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/07__Refox_bitmap.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>To find out the exact shorted component, we need to use the rosin inspection method.<\/p>\n\n\n\n<p>Apply rosin smoke on the surface of the relative areas on the motherboard<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/08__Apply_rosin_smoke_on_the_Motherboard.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>Then connect the motherboard with the DC power supply machine and check under the microscope, we can find the shorted component easily.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/10__the_shorted_capacitor_around_the_NAND.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>Refer to the bitmap, it&#8217;s the capacitor C2941<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/11__C2941.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>Since it&#8217;s a filter-type capacitor, to avoid the potential heat damage to the NAND and connectors around it. We can just pick it off with tweezers directly.<\/p>\n\n\n\n<p>After that, connect the logic board with the screen and boot with the DC power supply machine again, the phone can be booted.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/12__Phone_can_be_booted_normally.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>Then, let&#8217;s fix the missing pads on the middle layer.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/13__The_missing_pads_on_the_middle_layer.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>Fixing the missing pads is not very difficult but requires a lot of patience.<\/p>\n\n\n\n<p>For the pad that has no connection point<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/14__For_the_pad_that_has_no_connection_point.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>We need to scratch out the root of the pad with a sculpture knife slightly first<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/15__Scratch_out_the_pads.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>After that, based on the &#8220;root&#8221; to jump wire and make a circle<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/16__Make_a_circle.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>Then solder a copper lug on the surface<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/17__Solder_a_copper_lug_on_the_jumped_wire_circle.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>Then cure and reinforce it with the UV mask and UV lamp.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/18__Cure_with_the_UV_lamp.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Assembler et tester<\/h2>\n\n\n\n<p>Then assemble the two layers of the motherboard first with the heating platform<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/19__Heating_platform.png\" alt=\"\" title=\"\"><\/figure>\n\n\n\n<p>When the motherboard cooling down, assemble the phone to test and all the functions are OK.<\/p>\n\n\n\n<p>The issue gets resolved by removing the damaged capacitor and recombining the two layers of the motherboard.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/iPhone_12_Pro_Max_Wont_Turn_On.png\" alt=\"iPhone 12 Pro Max Won&#039;t Turn On\" title=\"\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">R\u00e9sum\u00e9<\/h2>\n\n\n\n<p>The iPhone 12 Pro Max issue of not turning on due to serious drop damage was resolved by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Removing the damaged capacitor (C2941).<\/li>\n\n\n\n<li>Recombining the two layers of the motherboard.<\/li>\n\n\n\n<li>Fixing the missing pads.<\/li>\n<\/ul>\n\n\n\n<p>This repair requires careful inspection and precise work to ensure the phone is restored to full functionality without causing additional damage.<\/p>","protected":false},"excerpt":{"rendered":"<p>The iPhone 12 Pro Max, announced on October 13, 2020, is a high-end smartphone known for its advanced features. However, a serious drop can cause it to fail to turn on. This guide details the steps to troubleshoot and repair this issue. Phone Details Model: iPhone 12 Pro Max Announced:\u00a02020, October 13 Defect Phenomenon An [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":13266,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[5,13,158],"tags":[258,862,252],"class_list":["post-13265","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide","category-how-to","category-iphone-guide","tag-iphone-12-pro-max","tag-iphone-12-pro-max-wont-turn-on","tag-iphone-wont-turn-on"],"_links":{"self":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/posts\/13265","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=13265"}],"version-history":[{"count":0,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/posts\/13265\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/media\/13266"}],"wp:attachment":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/media?parent=13265"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/categories?post=13265"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/tags?post=13265"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}