{"id":13105,"date":"2022-05-26T08:42:00","date_gmt":"2022-05-26T00:42:00","guid":{"rendered":"https:\/\/rewa.tech\/huawei-mate-40-pro-water-damage-repair\/"},"modified":"2024-05-10T14:46:21","modified_gmt":"2024-05-10T06:46:21","slug":"huawei-mate-40-pro-water-damage-repair","status":"publish","type":"post","link":"https:\/\/rewa.tech\/es\/huawei-mate-40-pro-water-damage-repair\/","title":{"rendered":"HUAWEI Mate 40 Pro Reparaci\u00f3n de da\u00f1os por agua"},"content":{"rendered":"<p>HUAWEI Mate 40 Pro water damage and the funny thing is the phone was dropped into the water by the dog.<\/p>\n<p>The situation is similar to the following  <\/p>\n<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Pet_drop_the_phone_into_water.png\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<h2>Fen\u00f3meno del defecto<\/h2>\n<p>Receiving this phone then disassemble to check the parts and motherboard inside.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Water_damaged.png\" alt=\"\" width=\"748\" height=\"886\" title=\"\"><\/p>\n<\/p>\n<p>But after disassembling the phone, the motherboard inside looks fine, just like the OEM New.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Mate_40_Pro_Water_Damaged.png\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p>Check the motherboard carefully, there is no water damage sign or any other abnormal like deformation, part missing, etc. Check the parts inside, everything also looks fine.<\/p>\n<p>Measure the diode values on the connectors, also OK.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Test_with_multimeter_Mate_40_Pro.png\" alt=\"\" width=\"742\" height=\"917\" title=\"\"><\/p>\n<\/p>\n<p>Connect the motherboard with the DC power supply, there is no current leakage either.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Connect_Mate_40_Pro_with_voltge.png\" alt=\"\" width=\"742\" height=\"961\" title=\"\"><\/p>\n<\/p>\n<p>Trigger the power button to start up, and the board can be booted normally.&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Mate_40_Pro_can_be_booted.png\" alt=\"\" width=\"740\" height=\"963\" title=\"\"><\/p>\n<\/p>\n<p><strong><span style=\"color: #ff6600;\">Is it possible the repair center made the wrong judgment?<\/span><\/strong><\/p>\n<p>Let&#8217;s assemble the board and parts, then connect with the DC power supply machine and turn on the device to test again. Once connected with the DC power supply, there is a 40-50mA current leakage. And the board cannot be booted again.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/40mA_current_lakage_Mate_40_Pro____2___.png\" width=\"740\" height=\"974\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p>This means the motherboard is OK, the no boot is caused by the parts damage.<\/p>\n<p>Then let&#8217;s connect the connectors one by one to test, and when testing with the DOCK flex cable there is a 40mA current leakage.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/The_dock_flex_cable.png\" alt=\"\" width=\"740\" height=\"848\" title=\"\"><\/p>\n<p>The dock flex cable is responsible for the charging and SIM card recognization.<\/p>\n<p>After removing the plastic shielding cover, as we can see the connector under it gets corrosive.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Water_damage_the_flex_cable.png\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p>Take out the little board, a large part of the board gets seriously water damaged and corrosive.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/little_board_gets_corrosive.png\" width=\"1400\" height=\"1139\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p>The deal with the corrosives on the little board<\/p>\n<p><strong>For the connectors<\/strong><\/p>\n<ul style=\"list-style-type: disc;\">\n<li>heat with the hot air gun to remove them<\/li>\n<li>clean the pads on the PCB board with soldering iron and solder paste<\/li>\n<li>clean the motherboard with PCB cleaner<\/li>\n<li>solder back the connectors<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Connectors_of_Mate_40_Pro.png\" width=\"476\" height=\"440\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p><strong>For the components and chips under the shielding cover<\/strong><\/p>\n<ul style=\"list-style-type: square;\">\n<li>heat with the hot air gun to remove the shielding cover first<\/li>\n<li>resolder the chips which look not good<\/li>\n<li>solder back the metal shielding cover<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/2-_Mate_40_pro.png\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p><strong>For the DOCK flex cable<\/strong><\/p>\n<p>You can purchase a new one or resolder the connector by the below steps<\/p>\n<ul style=\"list-style-type: circle;\">\n<li>Heat it up with the hot air gun slightly to take it off without damage<\/li>\n<li>Clean the oxidized pads on the flex cable with soldering iron and tin paste<\/li>\n<li>Clean the connector with PCB cleaner then solder it back with the soldering iron, ensure each pad are well connected<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Deal_with_the_connector_on_the_little_board.png\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p>After that, assemble the phone to test, the phone can boot normally.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/HUAWEI_Mate_40_Pro_Water_Damage.png\" alt=\"HUAWEI Mate 40 Pro Water Damage\" width=\"747\" height=\"987\" title=\"\"><\/p>\n<p>And all the functions like the display, touch, camera, Wi-Fi, Baseband, etc. are OK.<\/p>\n<\/p>\n<p>&gt;&gt;&gt; Go to <strong><a href=\"https:\/\/academy.rewa.tech\/courses\/android-course\">REWA Android Repair Course<\/a><\/strong>&nbsp;to learn more.<\/p>","protected":false},"excerpt":{"rendered":"<p>HUAWEI Mate 40 Pro water damage and the funny thing is the phone was dropped into the water by the dog. The situation is similar to the following Defect Phenomenon Receiving this phone then disassemble to check the parts and motherboard inside. But after disassembling the phone, the motherboard inside looks fine, just like the [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":13106,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[781],"tags":[],"class_list":["post-13105","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-android-repair-knowledge"],"_links":{"self":[{"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/posts\/13105","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/comments?post=13105"}],"version-history":[{"count":0,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/posts\/13105\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/media\/13106"}],"wp:attachment":[{"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/media?parent=13105"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/categories?post=13105"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/tags?post=13105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}