Muchas veces, las PCs de nuestro CCAs nomas no arrancan o al momento de encenderlas nadamas escuchamos unos "pitidos" aqui una explicacion de las causas de dichos pitidos:
Aquí es donde se producen los pitidos que indican el estado del ordenador
1. La BIOS envía al micro señales y asigna canales DMA y IRQ
2. Inicializa la BIOS de la VGA
3. Testeo y cuenta de memoria
4. Habilita las Led”s del Teclado y genera entradas
5. Busca el sector de arranque
6. Carga el boot managery cede el control al sistema operativo.
2. Inicializa la BIOS de la VGA
3. Testeo y cuenta de memoria
4. Habilita las Led”s del Teclado y genera entradas
5. Busca el sector de arranque
6. Carga el boot managery cede el control al sistema operativo.
Siempre que lo encendamos el modo que tiene la placa base de transmitir el estado del sistema es por medio de pitidos. Aquí tenemos algunos:
Ningún pitido: No hay suministro eléctrico (puede que el cable está sin enchufar, el cable en sí falla, o la la fuente de alimantación está jodida, la cuestión es que no llega corriente) o también puede ser que el “Speaker”, lo que emite los pitidos, no funcione (lo podes comprobar si a continuación funciona correctamente).
Tono continuo: Error en el suministro eléctrico (llega mal la corriente, o la fuente de alimentación esta descompuesta, ni modo hay que cambiarla).
Tonos cortos constantes: La placa base está defectuosa, es decir, está descompuesta, aqui pues ni modo, puedes reclamar la garantia (si es que tiene). Si no ve ahorrando y pregunta para comprarla nueva.
Un tono largo: Error de memoria RAM, lo normal es que esté mal puesta o que ya haya pasado a mejor vida.
Un tono largo y otro corto: Error el la placa base o en ROM Basic. Esto suele ocurrir mucho en placas base viejas, lo mejor es entregarla en las manos de el camion de la basura.
Un tono largo y dos cortos: Error en la tarjeta gráfica. Puede que el puerto falle, por lo que no habría más que cambiarla de puerto, pero también puede ser que la tarjeta gráfica este malita (Tambien suele ocurrir si le has flasheado mal la BIOs a la VGA.
Dos tonos largos y uno corto: Error en la sincronización de las imágenes. Seguramente problema de la gráfica.
Dos tonos cortos: Error de la paridad de la memoria. Esto ocurre sobretodo en ordenadores viejos (o usando RIMM) que llevaban la memoria de dos módulos en dos módulos. Esto significaría que uno de los módulos falla, o que no disponemos de un número par de módulos de memoria.
Tres tonos cortos: Esto nos indica que hay un error en los primeros 64Kb de la memoria RAM puedes intentar sacarla y limpiar los contactos con un borrado suave.
Cuatro tonos cortos: Error en el temporizador o contador.
Cinco tonos cortos: Esto nos indica que el procesador o la tarjeta gráfica se encuentran bloqueados. Suele ocurrir con el sobrecalentamiento, se recomienda que en este caso se deje apagada hasta que se normalize la temperatura.
Seis tonos cortos: Error en el teclado. Si ocurre esto yo probaría con otro teclado. Si aun así no funciona se trata del puerto receptor del teclado.
Siete tonos cortos: Modo virtual de procesador AT activo.
Ocho tonos cortos: Error en la escritura de la video RAM.
Nueve tonos cortos: Error en la cuenta de la BIOS RAM.
Muchas veces nos suenan muchos de estos pitidos por cosas que no entendemos pero luego sigue funcionando con normalidad. En ese caso sería problema del detector de errores o de esa especie de escaneo que nos hace al encender el ordenador.
espero que les sirva esta infromacion
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