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Jack Scarpon Posted on Mar 25, 2019

TOSHIBA 49L621U TURNS ON FOR ONE SEC, LOGO SHOW, AND IT TURNS OFF... STANDBY LIGHT THEN FLASH 8 TIMES, AND GOES OFF..

PCB REPLACED, MCB REPLACED AND GOT THE SAME ISSUE... BACKLIGHTS ARE BRIGHT, AND ALL OF THEM WORK... PLEASE HELP...

5 Related Answers

Anonymous

  • 5138 Answers
  • Posted on Jan 04, 2009

SOURCE: KP-57WS500 8 blinks will not power on

High Voltage Splitter Block #8-598-955-32 8 Blinks Call MAT electronics 1-800-628-1118 or Electronix Parts 1-800-223-3205 or you can go to thier websites online.

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Anonymous

  • 1 Answer
  • Posted on Nov 29, 2009

SOURCE: Sony plasma standby light flashes 8 X, won't stay on

when pluggin power it turns on and immediately move to standby

Rinoo Kumari

  • 2973 Answers
  • Posted on Dec 12, 2009

SOURCE: G1 backlight shows but nothing else

Everything is working fine except the operating system (firmware). A clear case of corrupted firmware. Please get the firmware reinstalled. And you will find that all your problems have vanished. The reason could be a virus or incorrect switching off or powering it on on low battery when the phone switches off on its own. Anything. But reinstalling is the answer.

Anonymous

  • 10594 Answers
  • Posted on Oct 02, 2010

SOURCE: turns on for 30 sec then goes bright blue and goes

This is blue CRT problem in tv as it is rear projection tv that has three CRTs red-green-blue inside to project color picture on front screen.
Blue CRT (tube) will be replaced to fix the issue and it is job of Pro because lots of adjustments are required after replacement of tube.
Local tv repair shop will help you for that.
Thanks

Anonymous

  • 4889 Answers
  • Posted on Nov 13, 2010

SOURCE: I have a lcd toshiba

The tv is turning off due to somekind of protection fault. Can you tell me how many times the yellow light flashes in between each pause?

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0helpful
1answer

Toshiba 49L621U 49-Inch 4K LED Ultra HD TV. Looking for a Service Manual please?

Question edited for a lot more clarity and toss in some CAPS.

Unfortunately there is no service manual online, you just replace boards.

https://www.google.com/search?q=toshiba+49l621u+service+manual+pdf

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0helpful
1answer
1helpful
1answer

Will the LED backlights glow even when one LED is not working?when i switch ON tv,the toshiba logo displayed for a second and then it goes off.Flash light test on black screen shows images though.

I don't know your TV but are you sure that it is an "LED" TV? If not, it may be an "LCD" TV which is a bit different. An "LED" TV uses Light Emitting Diodes to illuminate the individual pixels or PIcture ELementS. If it is an "LCD" TV, the picture works more like an electronic digital watch. The picture is produced within the screen and uses a florescent tube on the bottom and side to back light the screen. If you can see the picture with a flashlight, I suspect that it is an "LCD" type. If it was an "LED" TV, and it didn't light up, the LED's that make up the pixels wouldn't be firing and you wouldn't be seeing a picture even with a flashlight. Just like any florescent light tube, these "LCD" back light tubes will dim with age until they eventually fail. If the Toshiba logo lights and goes out, this sounds like the bulbs or their high voltage drivers are failing. Good luck.
0helpful
1answer

My Toshiba model 49L621U lights up shows the logo then goes dark. Has audio and can see menu with flashlight test. Tried replacing the PK101W1230I Power Led Board and same problem persisted.

If this set has video board it may be the culprit. Some sets video board and control board are combined. So you may have to do some searching on google to find others who have had similar failure and solutions.
0helpful
1answer

My Toshiba 49L621U (TV)will not turn on it just flashes logo then promptly turns off

you battery must have a problem try to remove batterry and plug the power supply .or maybe its your hardisk failure your hardisk must be corrupted something like that
1helpful
1answer

I have a Toshiba 32bv700b that will not turn on and the white standby light continually flashes on and off

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. http://electronicshelponline.blogspot.com/
Blinking codes details of many popular brand TVs are given. Surf the site with patience. If blinks continue without any pause, the main board is faulty.
0helpful
1answer

TV turns off by itself after being on for 60 seconds

Led blinking Three times means B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit, check T603 and R672.
Hope this helps.
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