{"id":2306,"date":"2021-09-06T10:13:48","date_gmt":"2021-09-06T10:13:48","guid":{"rendered":"http:\/\/192.168.2.19:8666\/?p=1"},"modified":"2024-10-10T15:01:49","modified_gmt":"2024-10-10T07:01:49","slug":"how-to-fix-iphone-11-won-t-turn-on-with-large-current","status":"publish","type":"post","link":"https:\/\/rewawp.iamtareq.com\/de\/how-to-fix-iphone-11-won-t-turn-on-with-large-current\/","title":{"rendered":"iPhone 11 Pro l\u00e4sst sich nicht einschalten - Professionelle Reparaturanleitung"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Hello everyone! Our course today is about repairing an iPhone 11 Pro that won\u2019t turn on.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Press the power button. The phone won\u2019t turn on.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Disassemble and Test<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Then we disassemble the phone and test. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Remove the two pentalobe screws at the bottom edge. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pull up on the small nub on the Suction Cup to lift the screen. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Insert a Pry Piece when there is a gap and slide it along the gap.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-2.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">After the screen is lifted, take the shielding covers off. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Disconnect the battery and remove the screen. Connect the motherboard with the Power Cable. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The ammeter shows a large current of 3.1A.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-3.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Disconnect the flex cables. Remove the SIM card tray. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Detach the motherboard. Connect the motherboard with the Power Cable again. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The ammeter still shows a large current of 3.1A. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It indicates that the large current has nothing to do with other flex cables. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The fault is on the motherboard.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-4.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Messung im Diodenmodus<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Run diode mode measurement of pin 1 on the J7010 of the battery connector. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The diode value is 0. It indicates that the main power supply circuit is shorted to the ground. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Since the circuit simultaneously supplies power for the logic board and signal board, we need to separate the motherboard to locate the fault.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-5.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Motherboard-Trennung<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Remove foam on the motherboard. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Heat the back of the motherboard with Hot Air Gun at 240 degrees celsius. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Remove the shielding paper. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Put the motherboard on the <a style=\"color: #0066cc;\" href=\"https:\/\/shop.rewa.tech\/detail\/anti-static-professional-edition-heating-platform-for-motherboard-cpu-face-id-wl-mini203h-oem-new.html\" target=\"_blank\" rel=\"noopener noreferrer\">Heizungsplattform<\/a>. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Um das Entfernen der Logikkarte nach der Trennung zu erleichtern, drehen Sie eine Schraube auf die Logikkarte. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Set the temperature of the Heating Platform to 185 degrees celsius. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Clamp the screw to remove the logic board when the temperature has risen to 185 degrees celsius. Remove the signal board.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-6.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-7.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Messung im Diodenmodus<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Run diode mode measurement of pin 286 on the signal board. The diode value is 0. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It indicates that the main power supply of the signal board is shorted to the ground. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Measure pin 286 on the logic board. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The diode value is 363 which means the logic board is normal.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-8.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-9.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Open the bitmap. We can see there are many associated components on the main power supply circuit.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-10.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Rosin Detecting<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Next, we need to locate the faulty component with rosin detecting. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Remove thermal grease with a Sculpture Knife.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dip rosin with Soldering Iron at 365 degrees celsius. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Smoke rosin on the signal board. Set the direct current supply to 4.1V. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Connect the positive and negative anode of the direct current supply with multimeter probes. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Connect the black probe to the ground. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Connect the red probe to pin 286 on the signal board. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We can see rosin on C1200 K has melted. It indicates that the capacitor is damaged.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-11.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-12.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Then we heat it with Hot Air Gun at 350 degrees celsius. Remove the capacitor with tweezers.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-13.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Clean rosin on the signal board with PCB Cleaner. Run a second diode mode measurement. The diode value returns to a normal value of 327.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-14.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-15.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Motherboard Rekombination<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Smear rosin with Soldering Iron and solder wick at 365 degrees celsius to remove tin on the bonding pad.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Clean the signal board with PCB Cleaner. Remove tin and clean the logic board with the same method.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-16.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Attach the signal board to the Reballing Platform. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Put the Reballing Stencil in position. To prevent the solder paste from flowing into the motherboard crevices, insert a metal plate. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Apply a layer of low-temperature Solder Paste. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Remove the Reballing Stencil.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-17.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Put the signal board on the Heating Platform at 185 degrees celsius to heat. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After the solder balls are formed, turn the power off and cool the motherboard for 5 minutes. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Apply some Paste Flux. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Richten Sie die Logikplatine an der Signalplatine aus. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Keep heating on the Heating Platform at 185 degrees celsius. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the temperature reaches 185 degrees celsius, keep heating for 1 minute. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This step is to ensure that the logic board and the signal board fit closely.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-18.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-19.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-20.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Pr\u00fcfung<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Connect the motherboard with the Power Cable. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Short to the ground of the J7700 pin 12. The boot current becomes normal. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Put the motherboard on the phone. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Connect the flex cables. Connect the screen and battery. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because the battery is dead. Plug the charging cable and the phone turns on normally.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-21.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rewawp.iamtareq.com\/wp-content\/uploads\/2021\/09\/iphone-11-pro-won-turn-professional-repair-guide-22.webp\" alt=\"How to Fix iPhone 11 Won&#039;t Turn On with Large Current\" title=\"\"><\/figure>","protected":false},"excerpt":{"rendered":"<p>Learn how to fix iPhone 11 Pro that won&#8217;t turn on due to high current issue. Step-by-step guide for professionals.<\/p>","protected":false},"author":1,"featured_media":42670,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,5,13],"tags":[21,243,244],"class_list":["post-2306","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-guide","category-how-to","tag-iphone","tag-iphone-11-pro","tag-repair-guide"],"_links":{"self":[{"href":"https:\/\/rewawp.iamtareq.com\/de\/wp-json\/wp\/v2\/posts\/2306","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rewawp.iamtareq.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rewawp.iamtareq.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rewawp.iamtareq.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rewawp.iamtareq.com\/de\/wp-json\/wp\/v2\/comments?post=2306"}],"version-history":[{"count":0,"href":"https:\/\/rewawp.iamtareq.com\/de\/wp-json\/wp\/v2\/posts\/2306\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewawp.iamtareq.com\/de\/wp-json\/wp\/v2\/media\/42670"}],"wp:attachment":[{"href":"https:\/\/rewawp.iamtareq.com\/de\/wp-json\/wp\/v2\/media?parent=2306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewawp.iamtareq.com\/de\/wp-json\/wp\/v2\/categories?post=2306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewawp.iamtareq.com\/de\/wp-json\/wp\/v2\/tags?post=2306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}