{"id":9321,"date":"2026-02-16T13:16:47","date_gmt":"2026-02-16T12:16:47","guid":{"rendered":"https:\/\/www.datasystem.es\/nuevo\/?p=9321"},"modified":"2026-02-16T13:16:49","modified_gmt":"2026-02-16T12:16:49","slug":"pc-no-enciende-guia-de-diagnostico-fuente-ram-placa-pitidos","status":"publish","type":"post","link":"https:\/\/www.datasystem.es\/nuevo\/pc-no-enciende-guia-de-diagnostico-fuente-ram-placa-pitidos\/","title":{"rendered":"PC no enciende: gu\u00eda de diagn\u00f3stico (fuente, RAM, placa, pitidos)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Cuando un PC no enciende, la clave es diagnosticar en orden para no cambiar piezas a ciegas. Muchas veces el fallo est\u00e1 en algo b\u00e1sico: corriente, cable, interruptor de la fuente o una RAM mal asentada.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-1-diferencia-no-enciende-vs-enciende-pero-no-arranca\">1) Diferencia \u201cno enciende\u201d vs \u201cenciende pero no arranca\u201d<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Primero aclara el s\u00edntoma:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No enciende nada: no hay ventiladores, LEDs ni sonido.<a href=\"https:\/\/www.xataka.com\/basics\/mi-pc-no-enciende-16-consejos-para-solucionar-problemas-tu-ordenador-no-funciona-bien\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n\n\n\n<li>Enciende pero no da imagen \/ reinicia en bucle: suele apuntar a RAM, BIOS\/UEFI, CPU o placa (POST no completa).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Esta distinci\u00f3n te ahorra tiempo porque cambia el orden de pruebas.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.xataka.com\/basics\/mi-pc-no-enciende-16-consejos-para-solucionar-problemas-tu-ordenador-no-funciona-bien\"><\/a>\u200b<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-2-comprobaciones-electricas-rapidas-2-minutos\">2) Comprobaciones el\u00e9ctricas r\u00e1pidas (2 minutos)<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Prueba otro enchufe o regleta y cambia el cable de alimentaci\u00f3n si tienes otro compatible.<a href=\"https:\/\/www.pccomponentes.com\/mi-pc-no-enciende-soluciones\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n\n\n\n<li>En torre, revisa el interruptor trasero de la fuente (I\/0) y que el selector de voltaje (si existe) est\u00e9 correcto.<a href=\"https:\/\/www.xataka.com\/basics\/mi-pc-no-enciende-16-consejos-para-solucionar-problemas-tu-ordenador-no-funciona-bien\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n\n\n\n<li>Desconecta perif\u00e9ricos USB no esenciales (discos externos, hubs) por si hay un corto o bloqueo al arranque.<a href=\"https:\/\/www.xataka.com\/basics\/mi-pc-no-enciende-16-consejos-para-solucionar-problemas-tu-ordenador-no-funciona-bien\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-3-revisa-conexiones-internas-atx-eps-antes-de-culpar-a-la-placa\">3) Revisa conexiones internas (ATX\/EPS) antes de culpar a la placa<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Si puedes abrir la caja, verifica lo b\u00e1sico: conector ATX 24 pines y el EPS 4\/8 pines de CPU bien colocados. Un EPS flojo puede hacer que parezca \u201cmuerto\u201d o que intente arrancar y se apague.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Aprovecha para revisar el cableado del bot\u00f3n de encendido (PWR_SW) en la placa si el equipo no reacciona al pulsar.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/blog.waltostech.com\/reparar-pc-no-enciende\/\"><\/a>\u200b<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-4-ram-el-sospechoso-tipico-y-facil-de-probar\">4) RAM: el sospechoso t\u00edpico (y f\u00e1cil de probar)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La RAM mal colocada o un m\u00f3dulo inestable puede impedir el arranque o causar bucles de reinicio.<br>Pasos seguros:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Apaga, desconecta corriente y vuelve a colocar los m\u00f3dulos hasta o\u00edr los \u201cclics\u201d laterales.<\/li>\n\n\n\n<li>Prueba con&nbsp;<strong>un solo<\/strong>&nbsp;m\u00f3dulo y cambia de ranura (suele aislar un m\u00f3dulo defectuoso o una ranura problem\u00e1tica).<a href=\"https:\/\/www.xataka.com\/basics\/mi-pc-no-enciende-16-consejos-para-solucionar-problemas-tu-ordenador-no-funciona-bien\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n\n\n\n<li>Si tocaste XMP\/perfiles de memoria y justo despu\u00e9s dej\u00f3 de arrancar, desact\u00edvalo al recuperar BIOS\/UEFI o tras un clear CMOS.<a href=\"https:\/\/www.pccomponentes.com\/mi-pc-no-enciende-soluciones\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-5-clear-cmos-reset-bios-uefi-si-enciende-pero-no-da-video\">5) Clear CMOS (reset BIOS\/UEFI) si \u201cenciende pero no da v\u00eddeo\u201d<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Restablecer BIOS puede solucionar bloqueos por configuraci\u00f3n (por ejemplo, memoria). El \u201cclear CMOS\u201d se hace con el jumper\/pines indicados en la placa o retirando la pila seg\u00fan el manual.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.profesionalreview.com\/2019\/05\/12\/sintomas-placa-base-estropeada\/\"><\/a>\u200b<br>Si tras el reset aparece pantalla\/POST, el problema era de configuraci\u00f3n y no de hardware \u201cmuerto\u201d.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.profesionalreview.com\/2019\/05\/12\/sintomas-placa-base-estropeada\/\"><\/a>\u200b<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-6-senales-de-placa-pitidos-leds-y-diagnostico-basico\">6) Se\u00f1ales de placa: pitidos, LEDs y diagn\u00f3stico b\u00e1sico<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Muchas placas dan pistas con pitidos o LEDs de debug (CPU\/DRAM\/VGA\/BOOT). Si tu placa tiene esas luces, f\u00edjate en cu\u00e1l queda encendida para orientar el siguiente paso (por ejemplo, DRAM).<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.profesionalreview.com\/2019\/05\/12\/sintomas-placa-base-estropeada\/\"><\/a>\u200b<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-7-cuando-sospechar-fuente-o-placa-base\">7) Cu\u00e1ndo sospechar fuente o placa base<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Si no hay se\u00f1ales de vida pese a enchufe\/cable correctos y conexiones ATX\/EPS firmes, la fuente vuelve al primer puesto en la lista de sospechosos. Si puedes, prueba con otra fuente compatible para descartar.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.pccomponentes.com\/mi-pc-no-enciende-soluciones\"><\/a>\u200b<br>Si hay olor a quemado, da\u00f1os visibles o el equipo \u201cintenta\u201d y falla siempre igual tras RAM\/CMOS, la placa base puede estar implicada.<\/p>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 1080 \/ 1080;\" width=\"1080\" controls src=\"https:\/\/www.datasystem.es\/nuevo\/wp-content\/uploads\/2026\/02\/PC.mp4\"><\/video><\/figure>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.datasystem.es\/nuevo\/\" style=\"border-top-left-radius:64px;border-top-right-radius:64px;border-bottom-left-radius:64px;border-bottom-right-radius:64px;background-color:#267e01\">Vis\u00edtanos!<\/a><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-otros-articulos-interesantes\">Otros art\u00edculos interesantes<\/h3>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-8f761849 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-reparacion-de-ordenadores-a-domicilio-data-system wp-block-embed-reparacion-de-ordenadores-a-domicilio-data-system\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"7SCa8KuBe0\"><a href=\"https:\/\/www.datasystem.es\/nuevo\/firewall-que-es-y-como-configurarlo-en-casa\/\">Firewall, qu\u00e9 es? (y como configurarlo en casa)<\/a><\/blockquote><iframe class=\"wp-embedded-content lazyload\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u00abFirewall, qu\u00e9 es? (y como configurarlo en casa)\u00bb \u2014 SPInformatica\" data-src=\"https:\/\/www.datasystem.es\/nuevo\/firewall-que-es-y-como-configurarlo-en-casa\/embed\/#?secret=fn45zZE4yh#?secret=7SCa8KuBe0\" data-secret=\"7SCa8KuBe0\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" data-load-mode=\"1\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-reparacion-de-ordenadores-a-domicilio-data-system wp-block-embed-reparacion-de-ordenadores-a-domicilio-data-system\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"WSRv1r5T4k\"><a href=\"https:\/\/www.datasystem.es\/nuevo\/que-es-dns-y-como-funciona-explicado-facil\/\">Qu\u00e9 es DNS y c\u00f3mo funciona (explicado f\u00e1cil)<\/a><\/blockquote><iframe class=\"wp-embedded-content lazyload\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; 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--smush-placeholder-aspect-ratio: 320\/320;\" \/><\/a><\/figure>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cuando un PC no enciende, la clave es diagnosticar en orden para no cambiar piezas a ciegas. Muchas veces el fallo est\u00e1 en algo b\u00e1sico: corriente, cable, interruptor de la fuente o una RAM mal asentada. 1) Diferencia \u201cno enciende\u201d vs \u201cenciende pero no arranca\u201d Primero aclara el s\u00edntoma: Esta distinci\u00f3n te ahorra tiempo porque [&hellip;]<\/p>\n","protected":false},"author":25,"featured_media":9324,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[92,91,7],"tags":[],"class_list":["post-9321","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-consejos-rapidos","category-consejos-sobre-harware","category-quick-tips"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>PC no enciende: gu\u00eda de diagn\u00f3stico (fuente, RAM, placa, pitidos) - SPInformatica<\/title>\n<meta name=\"description\" content=\"Aprende a diagnosticar un PC que no enciende: corriente, fuente, RAM, BIOS\/UEFI y placa base, con pruebas seguras y ordenadas.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.datasystem.es\/nuevo\/pc-no-enciende-guia-de-diagnostico-fuente-ram-placa-pitidos\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PC no enciende: gu\u00eda de diagn\u00f3stico (fuente, RAM, placa, pitidos)\" \/>\n<meta property=\"og:description\" content=\"Aprende a diagnosticar un PC que no enciende: corriente, fuente, RAM, BIOS\/UEFI y placa base, con pruebas seguras y ordenadas.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.datasystem.es\/nuevo\/pc-no-enciende-guia-de-diagnostico-fuente-ram-placa-pitidos\/\" \/>\n<meta property=\"og:site_name\" content=\"SPInformatica\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/m.facebook.com\/informaticayelectronicamadrid\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-16T12:16:47+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-16T12:16:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.datasystem.es\/nuevo\/wp-content\/uploads\/2026\/02\/pc.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Tierno Galvan - 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