{"id":22299,"date":"2025-08-04T14:39:48","date_gmt":"2025-08-04T14:39:48","guid":{"rendered":"https:\/\/portatilinformatica.com.br\/?p=22299"},"modified":"2025-09-24T22:37:50","modified_gmt":"2025-09-24T22:37:50","slug":"reparo-imac-27-820%e2%80%9101779%e2%80%91a-nao-liga-video-falhando-ou-t2-bloqueado-especialista-em-placas-e-melhor-preco-de-bh","status":"publish","type":"post","link":"https:\/\/demo03wesoftwaredesign.com.br\/?p=22299","title":{"rendered":"Reparo iMac 27 820\u201101779\u2011A : Nao liga, V\u00eddeo Falhando ou T2 Bloqueado ?  \u2013 Especialista em Placas e Melhor Pre\u00e7o de BH"},"content":{"rendered":"<ul>\n<li data-start=\"295\" data-end=\"355\">\n<h1 style=\"text-align: center;\">Reparo iMac 27 820\u201101779\u2011A que nao liga<\/h1>\n<\/li>\n<\/ul>\n<h3 data-start=\"295\" data-end=\"355\"><\/h3>\n<h3 data-start=\"295\" data-end=\"355\">Sobre a placa l\u00f3gica iMac A2115 2020 \/ 27&#8243; \u2013 820\u201101779\u2011A<\/h3>\n<ul data-start=\"357\" data-end=\"558\">\n<li data-start=\"357\" data-end=\"398\">\n<p data-start=\"359\" data-end=\"398\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Modelo usado no iMac 27\u201d de 2020 (Apple A2115).<\/span><\/p>\n<\/li>\n<li data-start=\"399\" data-end=\"478\">\n<p data-start=\"401\" data-end=\"478\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Causa falhas como <strong data-start=\"18\" data-end=\"33\">sem energia<\/strong>, <strong data-start=\"35\" data-end=\"48\">sem v\u00eddeo<\/strong> ou <strong data-start=\"52\" data-end=\"101\">ativa\u00e7\u00e3o do chip T2\/Activation Lock bloqueado<\/strong><\/span><\/p>\n<\/li>\n<li data-start=\"479\" data-end=\"558\">\n<p data-start=\"481\" data-end=\"558\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Sintomas incluem: LED diagnostic na placa inicial acende (1 e 2), mas sem v\u00eddeo (indicador 3 ou 4 apagado ou fraco).<\/span><\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"565\" data-end=\"599\">\u26a0\ufe0f Problemas cr\u00f4nicos relatados<\/h2>\n<ol data-start=\"601\" data-end=\"943\">\n<li data-start=\"601\" data-end=\"726\">\n<p data-start=\"604\" data-end=\"643\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"><strong data-start=\"0\" data-end=\"65\" data-is-only-node=\"\">iMac liga (power supply OK), mas n\u00e3o responde ao bot\u00e3o ON\/OFF<\/strong> ou n\u00e3o entra em DFU.<\/span><\/p>\n<ul data-start=\"647\" data-end=\"726\">\n<li data-start=\"647\" data-end=\"726\">\n<p data-start=\"649\" data-end=\"726\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">\u00a0Indicam falha nos rails SLPS2R e AWAKE gerados pelo chip U7800. Sem tens\u00e3o correta, o equipamento n\u00e3o inicializa.<\/span><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"728\" data-end=\"857\">\n<p data-start=\"731\" data-end=\"770\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"><strong data-start=\"0\" data-end=\"26\" data-is-only-node=\"\">Boot loop ou sem v\u00eddeo<\/strong> mesmo com leds de power ativos.<\/span><\/p>\n<ul data-start=\"774\" data-end=\"857\">\n<li data-start=\"774\" data-end=\"857\">\n<p data-start=\"776\" data-end=\"857\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Ap\u00f3s capacitores estufados ou curto, o iMac mostra pattern LEDs 1 e 2 apenas. V\u00eddeo nunca aparece. Uma falha nesse componente ou nos drivers de backlight \u00e9 comum.<\/span><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"859\" data-end=\"943\">\n<p data-start=\"862\" data-end=\"943\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"><strong data-start=\"0\" data-end=\"38\" data-is-only-node=\"\">Falha no chip T2 e Activation Lock<\/strong> bloqueado: substitui\u00e7\u00e3o de chip Donor e restaurar via Apple Configurator resolve o lock.<\/span><\/p>\n<\/li>\n<\/ol>\n<h2 data-start=\"950\" data-end=\"1017\">\ud83e\uddf0 Solu\u00e7\u00f5es t\u00e9cnicas e servi\u00e7os robustos da Port\u00e1til Inform\u00e1tica<\/h2>\n<h3 data-start=\"1019\" data-end=\"1065\">\u2705 Diagn\u00f3stico completo e reparo de l\u00f3gica:<\/h3>\n<ul data-start=\"1066\" data-end=\"1237\">\n<li data-start=\"1066\" data-end=\"1109\">\n<p data-start=\"1068\" data-end=\"1109\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Medi\u00e7\u00e3o de rails: PP1V2_AWAKE, PP1V8_SLPS2R, PP3V3_AWAKE, PP2V5 etc.<\/span><\/p>\n<\/li>\n<li data-start=\"1110\" data-end=\"1153\">\n<p data-start=\"1112\" data-end=\"1153\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Substitui\u00e7\u00e3o de chip U7800 (regulador\/conversor) ou reballing.<\/span><\/p>\n<\/li>\n<li data-start=\"1154\" data-end=\"1237\">\n<p data-start=\"1156\" data-end=\"1237\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Substitui\u00e7\u00e3o de capacitores como C7845 para eliminar curto e realizar reflow de componentes.<\/span><\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"1239\" data-end=\"1261\">\u2705 Reparo de v\u00eddeo:<\/h3>\n<ul data-start=\"1262\" data-end=\"1349\">\n<li data-start=\"1262\" data-end=\"1305\">\n<p data-start=\"1264\" data-end=\"1305\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Teste de sinais EDP TCON \/ backlight, reflow do chip de video e limpeza de trilhas.<\/span><\/p>\n<\/li>\n<li data-start=\"1306\" data-end=\"1349\">\n<p data-start=\"1308\" data-end=\"1349\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Restaura\u00e7\u00e3o dos indicadores LED do c\u00f3digo diagnostic (todos os LEDs funcionando como indicados no board view).<\/span><\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"1351\" data-end=\"1380\">\u2705 Troca do chip Apple T2:<\/h3>\n<ul data-start=\"1381\" data-end=\"1464\">\n<li data-start=\"1381\" data-end=\"1464\">\n<p data-start=\"1383\" data-end=\"1464\"><span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\">Remo\u00e7\u00e3o do chip original bloqueado e reprograma\u00e7\u00e3o com Configurator ap\u00f3s substitui\u00e7\u00e3o por T2 desbloqueado de donor board.<\/span><\/p>\n<\/li>\n<li data-start=\"1381\" data-end=\"1464\">\n<p data-start=\"1383\" data-end=\"1464\">\u2705 Reflash EEPROM e programa\u00e7\u00e3o segura:<\/p>\n<\/li>\n<\/ul>\n<ul data-start=\"1509\" data-end=\"1605\">\n<li data-start=\"1509\" data-end=\"1605\">\n<p data-start=\"1511\" data-end=\"1605\">Regrava\u00e7\u00e3o de firmware da placa, reset SMC\/PRAM, configura\u00e7\u00e3o de serial para o modelo correto.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"1607\" data-end=\"1632\">\u2705 Limpeza preventiva:<\/h3>\n<ul data-start=\"1633\" data-end=\"1753\">\n<li data-start=\"1633\" data-end=\"1753\">\n<p data-start=\"1635\" data-end=\"1753\">Remo\u00e7\u00e3o de poeira, troca da bateria BIOS, limpeza termal e pads t\u00e9rmicos com pasta t\u00e9rmica 18\u202fW\/mK ou pads de 12\u202fW\/mK.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"1760\" data-end=\"1797\">\ud83d\ude9a Atendimento especializado em BH<\/h2>\n<ul data-start=\"1799\" data-end=\"2188\">\n<li data-start=\"1799\" data-end=\"1840\">\n<p data-start=\"1801\" data-end=\"1840\">Diagn\u00f3stico e or\u00e7amento no mesmo dia.<\/p>\n<\/li>\n<li data-start=\"1841\" data-end=\"1896\">\n<p data-start=\"1843\" data-end=\"1896\">Pe\u00e7as: capacitor, regulador U7800, chip T2, EEPROM.<\/p>\n<\/li>\n<li data-start=\"1897\" data-end=\"1979\">\n<p data-start=\"1899\" data-end=\"1979\">Reparos com esta\u00e7\u00e3o de soldagem BGA \/ microscope e materiais de alta precis\u00e3o.<\/p>\n<\/li>\n<li data-start=\"1980\" data-end=\"2046\">\n<p data-start=\"1982\" data-end=\"2046\">Testes em bancada com PSU isolada e inje\u00e7\u00e3o de energia em DFU.<\/p>\n<\/li>\n<li data-start=\"2047\" data-end=\"2132\">\n<p data-start=\"2049\" data-end=\"2132\">Entrega com relat\u00f3rio t\u00e9cnico comprovando tens\u00f5es de rail, LEDs e teste de v\u00eddeo.<\/p>\n<\/li>\n<li data-start=\"2133\" data-end=\"2188\">\n<p data-start=\"2135\" data-end=\"2188\">Garantia de 90 dias sob servi\u00e70 prestado.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2190\" data-end=\"2276\">Atendimento local: bairros at\u00e9 3\u202fkm da Av.\u202fGuarapari, 53 \u2013 loja\u202f8 \u2013 Santa Am\u00e9lia \u2013 BH.<\/p>\n<p data-start=\"2278\" data-end=\"2386\">\ud83d\udcde WhatsApp: xx31995787120<br data-start=\"2304\" data-end=\"2307\" \/>\ud83d\udcf8 Instagram: <a class=\"\" href=\"https:\/\/instagram.com\/portatilinformatica\" target=\"_new\" rel=\"noopener\" data-start=\"2321\" data-end=\"2386\">@portatilinformatica<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Reparo iMac 27 820\u201101779\u2011A que nao liga Sobre a placa l\u00f3gica iMac A2115 2020 \/ 27&#8243; \u2013 820\u201101779\u2011A Modelo usado no iMac 27\u201d de 2020 (Apple A2115). Causa falhas como sem energia, sem v\u00eddeo ou ativa\u00e7\u00e3o do chip T2\/Activation Lock bloqueado Sintomas incluem: LED diagnostic na placa inicial acende (1 e 2), mas sem v\u00eddeo&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31,1,35],"tags":[],"class_list":["post-22299","post","type-post","status-publish","format-standard","hentry","category-area-de-atuacao","category-artigos","category-macos"],"_links":{"self":[{"href":"https:\/\/demo03wesoftwaredesign.com.br\/index.php?rest_route=\/wp\/v2\/posts\/22299","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/demo03wesoftwaredesign.com.br\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/demo03wesoftwaredesign.com.br\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/demo03wesoftwaredesign.com.br\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/demo03wesoftwaredesign.com.br\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=22299"}],"version-history":[{"count":3,"href":"https:\/\/demo03wesoftwaredesign.com.br\/index.php?rest_route=\/wp\/v2\/posts\/22299\/revisions"}],"predecessor-version":[{"id":22495,"href":"https:\/\/demo03wesoftwaredesign.com.br\/index.php?rest_route=\/wp\/v2\/posts\/22299\/revisions\/22495"}],"wp:attachment":[{"href":"https:\/\/demo03wesoftwaredesign.com.br\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=22299"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/demo03wesoftwaredesign.com.br\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22299"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/demo03wesoftwaredesign.com.br\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}