Question about Toshiba 50L4300U 50" 1080p LED-LCD TV - 16:9 - HDTV 1080p 1920 x 1080 - Audyssey EQ, Audyssey ABX, Audyssey Dynamic Volume - 4 x HDMI - USB - Ethernet - Wi-Fi - PC Streaming - Internet Access - Media Player

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Lost sound on my Toshiba 50L4300U after a lightning strike caused a power surge.

I have picture but no sound

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4 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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toolkits
  • 1099 Answers

SOURCE: the power shut off after lightning striked and my

Hello,

All plasma an lcd tvs have boards that control vertical and horizontal output to their respective areas. They are connected to the screen by ribbon cables. If one of these boards fails all together, has a failed chip, a bad connection, or a bad ground somewhere it will result in a black line in the area of that board. A bad ribbon cable connection on the bottom will result in a vertical black bar though the screen. Many times reseating the connection will fix it, if the ribbon cable has been nicked there could be a severed connection. They can sometimes be fixed, but it is a pain. An yes I have done it, and the bar is gone. The same will happen if the chip that outputs to that area opens. The connectors are the first place to look paying close attention to the cable, they are extremely delicate so great care must be taken if you decide to tinker with em, the usually have lift locks that release them, but it is very easy to wreck em.

Good luck.

Posted on Aug 03, 2010

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budmrtn
  • 11361 Answers

SOURCE: lightning strike on toshiba lcd tv

It may have taken out the surge suppresor devices and the main fuse in the TV power supply, that will be the first place to look.

Service manual:
http://elektrotanya.com/?q=showresult&megnev=Toshiba%20&megnev2=26LV610U&kategoria=tv&kat2=schematics
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

Please post back what you find.

Posted on Oct 22, 2010

eagle338
  • 4889 Answers

SOURCE: Toshiba 26lv610u tv/dvd has no sound or picture

Yes if there is no clicking, then the power supply is usually faulty. However its difficult to tell if it has affected any other boards(like the main board) with out testing it. I would suggest that you take the assistance of a tech, have him test it to determine if its just power. If yes then you can get a new power board and replace it. Otherwise it may be wiser just to get a new tv. You can get a 26 inch tv for around 350-400$ now.

Posted on Nov 02, 2010

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1 Answer

When and How Should a Surge Protector Be Used on a Fixed Switch?


Common Causes of Lightning Strikes
  • Outdoor network cables or power cables are routed overhead.
  • A switch is deployed outdoors but is not properly grounded.

Damages of Lightning Strikes
  • If power cables of a switch are routed overhead in an outdoor environment, lightning strikes may burn the power supplies.
  • If network cables of a switch are routed overhead in an outdoor environment, lightning strikes may burn interfaces of the switch.
When a switch undergoes lightning strikes, overvoltage is induced by lightning on network cables and transmitted to interior of the chassis. The surge protection measures, such as lightning rod and chassis grounding cannot prevent the damage. Therefore, surge protectors or surge protection circuits are recommended.

Surge Protector Use Precautions Take the following precautions to protect a switch from lightning:
  • Ensure that the ground cable is connected to a ground bar or a ground point on the cabinet.
  • Avoid routing cables overhead in an outdoor environment. Bury cables underground or route them in steel tubes.
  • To protect network interfaces against lightning, use 8-line surge protectors (or Huawei certified 4-line surge protectors).
  • When installing a network interface surge protector, connect the IN end to terminals and the OUT end to network interfaces of the switch.
If a fixed switch is installed in a network box, follow these instructions:
  • Connect the ground cables of the switch and surge protectors to the ground bar in the network box.
  • The maximum length of a ground cable cannot exceed 40 cm, and a length of smaller than 15 cm is recommended.
  • If the network box is located outdoors and power cables are routed aerially over a long distance (more than 300 m) to the network box, it is recommended that you install a power supply surge protector in the network box. The decoupled power cable must be at least 3 m long
S2300 Switch Thunder link com

Dec 08, 2016 | Office Equipment & Supplies

1 Answer

After a lightning strike my smart tv lost its picture everything else works fine trying to isolate which card is the problem.


For the TV repair, if you're lucky it's just a 20 cent fuse or two on the power supply board. If you're not so lucky it could be parts of the power supply board, which can be a simple replace job. But if it's beyond that if some of the display electronics got fried (Being a name brand like LG, it shouldn't) it could be listed as BER (Beyond Economical Repair)

If the TV also had a coax going in, that can cause damage to the electronics and bypass the surge protection entirely, which is why some surge protectors have coax jacks on them, as well as phone/modem jacks.

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May 03, 2016 | Televison & Video

1 Answer

I have a LED TV that was hit with a power surge caused by lightning.


Could be your household insurance would cover the damage.

Unless the lightning strike was very local to you, on your side of the local substation, the responsibility for the cost of repair or replacement could be the power company's.

Surges from lightning strikes aren't supposed to get past the electrical substation.

Old-fashioned valve tvs and radios sometimes survived huge surges on the powerline and even minor lightning strikes to the antenna but solid state semi-conductors and micro chips aren't very tolerant to overloads of any sort. These days a tv is not longer a tv in the conventional sense but like cars and radios should be considered as just another computer that is full of CMOS chips which are extremely sensitive to overloads and static discharges. Even the screen of your tv is made up of semi-conductors.

I would be very surprised if the set isn't a write-off.

Sep 04, 2015 | Samsung UN55C6500VFXZA 55in Led Hdtv 1080p...

1 Answer

Power surge on my Toshiba 50L4300U and now no sound. I do have picture


Check fuses and breakers on Polk.
If they are ok then take it to the shop.

Mar 30, 2014 | Toshiba 50L4300U 50" 1080p LED-LCD TV -...

1 Answer

Power surge caused by lightning strike, TV is dead, any Thoughtd/ does this damage every components?


Lightning can cause serious damage. You will surely want to get a professional diagnoses. What is damaged depends on where the surge came in at, and the intensity of the surge. If the surge came in through the power cable, most likely your power supply board has damage. But I have seen situations where the surge came in though an HDMI or coax connection and just take out the main board. But the moral of the story is to get a proper diagnoses, you could have several boards damaged.

Nov 24, 2012 | Astar LTV-2701 27 in. HD-Ready LCD...

1 Answer

53FDX20B NO PICTURE AND SOUND


It powers up but no picture? In my experience with Hitachi TV's this has been an issue with the convergence IC's failing. You will need to have a technician replace those if needed.

Jul 23, 2009 | Hitachi 53FDX20B 53" Rear Projection...

1 Answer

I have a toshiba tz50v51 projection tv. the red power light is on


It could either be due to the convergence Circuits ( If the Power Indicator Blinks) or the power deflection board if it doesnt blink. I have a source for parts if you would like the link.

Jun 20, 2009 | Toshiba TZ50V51 50" Rear Projection...

1 Answer

Have a Toshiba MW24F11 combo tv. Near lightning strike through surge suppressor. Will not turn on. 6.3 amp fuse blown; replace, blew again. Next step, or start looking for replacement. Set is 25...


power surges generally damage diodes and capacitors causing the fuse to blow, any reputable tv shop can repair for a fraction of replacing this set.

Sep 15, 2008 | Televison & Video

1 Answer

Sound problem


It is really unusual that you retained the picture part after the lightning strike, but what is wrong now is in the audio portion of your tv (obvious). However, if you have not taken the back cover off already it could be as simple as a blown fuse in the low voltage power supply or just blown audio amplifiers due to the sudden voltage and current surge caused by the lightning. The fact that you can get your audio through your surround system kinda narrows it down to the audio amplifier section. Just take the back off and look because those size tvs do not have alot of boards. All in all see if the problem is visually obvious like a fuse, because with out taking actual voltage measurements it could be a couple of boards in there causing the problem. Good luck and let me know. God bless you. Robert

Aug 27, 2008 | Apex Digital AVL2776 27 in. HD-Ready LCD...

1 Answer

Surge from lightning strike damaged tv and won't turn on.


Unless you are skilled at trouble shooting power supplies , you will be better off getting a skilled repair center to repair yourset. If its repairable I have seen surges from lightning strikes make the set no longer cost effective to repair.

Jun 18, 2008 | Televison & Video

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