{"id":13197,"date":"2022-07-14T10:38:00","date_gmt":"2022-07-14T02:38:00","guid":{"rendered":"https:\/\/rewa.tech\/huawei-p40-pro-improper-charging-causes-no-boot\/"},"modified":"2024-09-05T14:59:47","modified_gmt":"2024-09-05T06:59:47","slug":"huawei-p40-pro-wont-boot","status":"publish","type":"post","link":"https:\/\/rewa.tech\/fr\/huawei-p40-pro-wont-boot\/","title":{"rendered":"HUAWEI P40 Pro ne d\u00e9marre pas - Corrigez les probl\u00e8mes de charge incorrecte"},"content":{"rendered":"<p>The HUAWEI P40 Pro is a high-end smartphone that delivers excellent performance, but improper charging can lead to serious problems, such as the phone refusing to boot. This particular case involves using a motorcycle charger, which likely damaged critical components related to charging and the USB circuit. Many users may think the only solution is to replace the entire motherboard, but with the right troubleshooting techniques and component-level repair, we can fix this issue effectively and at a lower cost.<\/p>\n\n\n\n<p>This guide is perfect for technicians, DIY enthusiasts, and anyone looking to resolve charging issues in their HUAWEI P40 Pro without replacing the entire device.<\/p>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile is-image-fill has-blush-light-purple-gradient-background has-background\"><figure class=\"wp-block-media-text__media\" style=\"background-image:url(https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Huawei-P40-Pro.png);background-position:50% 0%\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Huawei-P40-Pro.png\" alt=\"Huawei P40 Pro\" class=\"wp-image-15284 size-full\" title=\"\" srcset=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Huawei-P40-Pro.png 1024w, https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Huawei-P40-Pro-300x300.png 300w, https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Huawei-P40-Pro-150x150.png 150w, https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Huawei-P40-Pro-768x768.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/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> HUAWEI P40 Pro<\/p>\n\n\n\n<p><strong>Annonc\u00e9 :&nbsp;<\/strong>2020, 26 mars<\/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>The phone was charged using a motorcycle charger, which resulted in the device being unable to boot. The cause was likely a malfunctioning charger or improper charging operation, leading to damage in the phone&#8217;s charging circuits.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">D\u00e9pannage<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1: Initial Assumptions<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Since the problem is charging-related, we can reasonably assume the issue stems from either the USB circuit or charging IC.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2: Disassembling the Phone<\/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<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/01__Protect_the_cameras_and_take_out_the_motherboard.png\" alt=\"huawei p40 pro won&#039;t boot\" 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<ul class=\"wp-block-list\">\n<li>Begin by disassembling the phone. Ensure the cameras are protected with stickers and carefully remove the motherboard.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">3: Testing for Current Leakage<\/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<figure class=\"wp-block-gallery has-nested-images columns-2 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\/02__Solder_a_wire_on_the_motherboard_to_connect_with_the_positive_of_the_power_supply.png\" alt=\"Solder a wire onto the motherboard\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/03__Trigger_to_boot_and_find_there_is_a_45mA_current_leakage.png\" alt=\"alimentation en courant continu\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/04__remove_the_shielding_cover.png\" alt=\"damaged chip\" title=\"\"><\/figure>\n<\/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<ul class=\"wp-block-list\">\n<li>Solder a wire onto the motherboard and connect it to the positive clamp of a <a href=\"https:\/\/shop.rewa.tech\/detail\/sugon-3005pm-dc-power-supply.html\">Alimentation en courant continu<\/a>.<\/li>\n\n\n\n<li>Trigger the boot process, and observe a <strong>42mA current leakage<\/strong>, indicating potential chip damage causing overheating.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">4: Thermal Imaging<\/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<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\/05__Find_the_chip_gets_hot.png\" alt=\"imageur thermique\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/06__The_charging_IC.png\" alt=\"charging ic\" title=\"\"><\/figure>\n<\/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<ul class=\"wp-block-list\">\n<li>Utiliser un <a href=\"https:\/\/shop.rewa.tech\/detail\/lincseek-shortcam-ii-infrared-thermal-imaging-camera.html\">imageur thermique<\/a> with the DC power supply connected to locate the overheated chip.<\/li>\n\n\n\n<li>The thermal image reveals that the <strong>charging IC<\/strong> is the culprit, and its thermal grease has already turned black, confirming the damage.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">5: Charging IC Removal<\/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<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\/07__Remove_the_charging_IC.png\" alt=\"remove charging ic\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/08__Reball_a_new_charging_IC.png\" alt=\"appliquer la p\u00e2te \u00e0 braser\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/09__Solder_back_the_new_charging_IC.png\" alt=\"solder new charging\" title=\"\"><\/figure>\n<\/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<ul class=\"wp-block-list\">\n<li>Appliquer <a href=\"https:\/\/shop.rewa.tech\/detail\/lead-free-solder-paste-maant-oem-new.html\">p\u00e2te \u00e0 souder<\/a> to the charging IC area and heat it with a <a href=\"https:\/\/shop.rewa.tech\/detail\/sugon-2020d-hot-air-gun.html\">pistolet \u00e0 air chaud<\/a> to remove the faulty IC.<\/li>\n\n\n\n<li>Clean the PCB pads using solder wick and reball a new charging IC.<\/li>\n\n\n\n<li>Solder the new charging IC back onto the motherboard.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">6: Testing for Current Stability<\/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<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/10__Back_to_normal.png\" alt=\"alimentation en courant continu\" 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<ul class=\"wp-block-list\">\n<li>Connectez le <a href=\"https:\/\/shop.rewa.tech\/detail\/sugon-3005pm-dc-power-supply.html\">Alimentation en courant continu<\/a> again and verify that the current leakage has disappeared.<\/li>\n\n\n\n<li>The boot current curve returns to normal, confirming that the charging IC replacement resolved the booting issue.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Charging Issue Diagnosis and Repair<\/h2>\n\n\n\n<p>Although the phone now boots up properly, it still does not charge. The next step is to troubleshoot the charging system:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1: Dock Flex Cable Check<\/h3>\n\n\n\n<figure class=\"wp-block-image alignright is-resized\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/12__the_5V_voltage_cannot_be_measured.png\" alt=\"measure diode value\" style=\"width:250px\" title=\"\"><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Measure the 5V charging voltage on the <strong>c\u00e2ble flexible de quai<\/strong> and confirm that the correct voltage is present.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2: Diode Value Measurement<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Measure the diode value on the 5V voltage rail of the motherboard. A low value is observed, indicating a further issue in the charging circuit.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3: Filter Capacitor Removal<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Remove the black glue around the connector. Based on repair experience, remove the filter capacitor near the charging connector to test if it resolves the low diode value.<\/li>\n\n\n\n<li>The diode value remains low, indicating the problem lies deeper in the circuitry.<span style=\"color: #ff6600;\"><span style=\"color: #000000;\"><\/span><\/span><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Signal Board and Additional Chip Replacement<\/h2>\n\n\n\n<p>To identify the root cause of the charging issue, we need to inspect the signal board:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1: Motherboard Separation<\/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<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-4 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__separate_the_two_layers_of_the_motherboard.png\" alt=\"s\u00e9paration de la carte m\u00e8re\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/15__there_is_a_chip_get_burned.png\" alt=\"damaged chips\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/16__besides_this__two_chips_are_also_damaged.png\" alt=\"burned mosfet\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/17__we_can_jump_a_wire_to_fix_the_pads_missing_issue.png\" alt=\"mobile component\" title=\"\"><\/figure>\n<\/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<ul class=\"wp-block-list\">\n<li>Separate the two layers of the motherboard to inspect the signal board.<\/li>\n\n\n\n<li>Identify three damaged chips, including a burned <strong>MOSFET<\/strong> and two other components, as seen under the red circles.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">2: Chip Replacement<\/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<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/18__solder_back_a_new_one.png\" alt=\"damaged chips replacement\" 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<ul class=\"wp-block-list\">\n<li>Replace all three damaged chips.<\/li>\n\n\n\n<li>For the MOSFET, some PCB pads are damaged, requiring a jump wire to bypass the missing pad.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">3: <strong>Remontage<\/strong><\/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<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/19__Boot_normally.png\" alt=\"huawei p40 pro won&#039;t boot\" 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<ul class=\"wp-block-list\">\n<li>Recombine the two layers of the motherboard.<\/li>\n\n\n\n<li>Assemble the phone and run a final test to ensure everything is working.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Final Test and Results<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">After completing the repairs<\/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<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/HUAWEI_P40_Pro_Improper_Charging_Causes_No_Boot.png\" alt=\"HUAWEI P40 Pro Improper Charging Causes No Boot\" 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<ul class=\"wp-block-list\">\n<li><strong>Booting Functionality:<\/strong> The phone successfully boots up without any current leakage.<\/li>\n\n\n\n<li><strong>Charging Restored:<\/strong> The charging function is fully operational, allowing the phone to charge normally once again.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion :<\/h2>\n\n\n\n<p>When a HUAWEI P40 Pro won&#8217;t boot or charge due to improper charging, many assume the entire motherboard needs replacement. However, through precise troubleshooting and component-level repair, the charging IC and other damaged components can be replaced, restoring full functionality to the device. This guide demonstrates that detailed analysis and targeted repairs can save both time and money.<\/p>\n\n\n\n<p>If you\u2019ve encountered similar charging issues or would like further clarification on the steps mentioned, feel free to reach out or leave a comment below!<\/p>","protected":false},"excerpt":{"rendered":"<p>The HUAWEI P40 Pro is a high-end smartphone that delivers excellent performance, but improper charging can lead to serious problems, such as the phone refusing to boot. This particular case involves using a motorcycle charger, which likely damaged critical components related to charging and the USB circuit. Many users may think the only solution is [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":13198,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[166,5,13,447],"tags":[704,1455],"class_list":["post-13197","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-huawei","category-guide","category-how-to","category-troubleshooting","tag-huawei","tag-huawei-p40"],"_links":{"self":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/posts\/13197","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=13197"}],"version-history":[{"count":0,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/posts\/13197\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/media\/13198"}],"wp:attachment":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/media?parent=13197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/categories?post=13197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/tags?post=13197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}