Question about Toshiba 37AV502U 37 in. LCD HDTV

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I have a toshiba 37av502u when i turn it on there is a black screen the green power light is on just no pic

At first it would work for a bit then go black the it would work again then go black now it just always black

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  • Expert
  • 96 Answers

Have some to check it for you you might have a power supply problem

Posted on Jun 04, 2012

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4 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

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Posted on Jan 02, 2017

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Anonymous

  • 1077 Answers

SOURCE: TOSHIBA FLAT SCREEN TV has black screen but power light is on!?

Try resetting the TV by leaving it unplugged for an hour.
Plug it back in and check to see if it works normally.
If that doesn't work, rule out the Directv box by pressing the reset button near the access card. The box could be putting out a signal that doesn't have video or audio.
If everything fails, have the tech man come back to check everything that he did before you use the warranty on the TV.

Posted on Feb 20, 2009

tvservice306

tvservice306

  • 458 Answers

SOURCE: Toshiba 42HP66 No Picture, Only Power Works

try replaced z board Manufacturer Toshiba Part Number 75003032 Description ZSUS PCB ASSY

Posted on Oct 02, 2009

raymond marundan

  • 293 Answers

SOURCE: Toshiba 37AV502U Sounds keep going up all the

Deffective system ic.For repair and replace system ic.

Posted on Jul 04, 2011

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Toshiba 37 inch flat screen 37AV502U keep turning itself on then off randomly. Any ideas what it could be?


Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

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1 Answer

Black screen and no sound


The problem is most likely the the screws are loose on the inverter boards. The screws must be tighted as they provide the ground to the inverter bds. The inverter boards are undet the shields on both sides of the unit after pulling the back cover. One way to make sure that you are losing back lights and not video is when your picture goes black, shine a flash light on the screen at an angle and will see the video is still there. This mean the back lights are out. If you do not see the video it may be another problem

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1 Answer

My toshiba 32av500u has no picture completely blak only power little lit in front . turns on green no kind of sound


I have the same problem with the black screen and no sound. Also the green light turns on and off while hitting the power button. Although if i turn it on then off multiple times it eventually turns on and works perfect... Could you do the same thing before it finally quit all together or did yours just happen over night?
-Kenny

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Blown or damaged graphics chip on motherboard, would take to specialist repair shop

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try replaced z board Manufacturer Toshiba Part Number 75003032 Description ZSUS PCB ASSY

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first instinct u cooked sumthing

second try unpluging and removing both batterys ur nicad and the internal lithium 1
this shuld force bios 2 reset

if u cannot locate the internal battery un plug power and batt
w8 aprox 3days the internal clock will drain it 4 u

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1 Answer

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how can u fix this black screen? the green power light is on, shows vista for a bit then turns black and stays black. any solutions or do i have to send it back?

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