Repair guides and support for LED, LCD, HD and other Vizio TVs.

Preguntas 475 Ver todo

no power, no stanby light

checked main board ? Hdmi chips fried by surge.  changed board.  Still no power.  Main fuse is good. Power supply bad ?

Update (09/10/2018)

Block Image

. Here is the main board by HDMI in

Contestado! View the answer Yo también tengo este problema

Es esta una buena pregunta?

Calificación 1

Comentarios:

measure power supply board output to ensure it is giving correct voltages.

por

All caps look good. No bulging or leaking. Small burn mark by HDMI in (not USB) on main board. Figured power supply would still be good. I can't figure out which pin is standby power. Can I safely meter all pins coming off power supply to main board ?? Fuse is good.

por

Swapped out power supply and TV fired up. Easy fix. Now I can practice with the old board. Maybe I can fix it ??

por

Agregar un comentario
Reparte el espíritu de reparación esta Navidad
Obtén $12 de descuento en tu compra de $50 o más con el código FIXMAS12
Reparte el espíritu de reparación esta Navidad
Obtén $12 de descuento en tu compra de $50 o más con el código FIXMAS12

1 Respuesta

Solución Elegida

Jon Wesley  right now you are a bit all over the the place. If you have no power and no standby voltage, your T-con board etc., will not have anything to do with this. Your “usb chips fried by surge “ those are on the main board. Is that waht you replaced. If so, your next subject would be a bad power board. Post some good pictures of your boards with your question so that we can see what you see. Use this guide Adding images to an existing question for that

Fue útil esta respuesta?

Calificación 2

Comentarios:

Thank you. Yes, I replaced main board. Still no power or standby light. Ordered new power supply board, will arrive this week. Can't see any defect in the old one, but for 30$ it seemed like the next logical step. I was wondering how a power surge through the HDMI port could damage power supply? Tiny chips by HDMI are def burned. Owner said Xbox that was connected is dead as well.

por

This can happen because the main board is connected to the power board. So if one board get's hit it may destroy the other one as well.

por

Seems logical, I'm surprised I can't see the damage. I'm picking up a better meter in order to get some more info.

por

Agregar un comentario

Añadir tu respuesta

Jon Wesley estará eternamente agradecido.
Ver Estadísticas:

Ultimas 24 Horas: 0

Últimos 7 Días: 2

Últimos 30 Días: 12

Todo El Tiempo: 59