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08-31-2016, 12:16 AM
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#1 |
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New Member
Join Date: Aug 2016
City & State: Greenville, SC
My Country: United States
I'm a: Knowledge Seeker
Posts: 4
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Toshiba 50" 50L2200U (50M2U) Power Issue
The TV wasnt showing any signs of life from the beginning. Would not turn on, make any kind of sounds, and had no red or green LED on the front. J replaced the whole power supply and now I have some readings on the p802 plug as listed below:
BLON - 0.3 DIM - 0.0 ACD - 3.5v PWON - 2.99v 5Vcc - 5.1v 5Vcc - 5.1v 5Vcc - 5.1v 12Vcc - 12v 12Vcc - 12v GND - na GND - na GND - na 12Va- 12v 12Va - 12v GND - na GND - na Im not quite sure which direction to go. Can someome please give me some testing ideas? Need thie TV asap! Thank you!! |
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08-31-2016, 01:26 AM
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#2 |
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New Member
Join Date: Aug 2016
City & State: Greenville, SC
My Country: United States
I'm a: Knowledge Seeker
Posts: 4
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Re: Toshiba 50" 50L2200U (50M2U) Power Issue
Those readings were with the mainboard plugged in. I have these readings below without it plugged in.
BLON - 0v DIM - 0v ACD - 3.5v PWON - 3.15v fluctuates down 5Vcc - 5.1v 5Vcc - 5.1v 5Vcc - 5.1v 1212Vcc - 0v 12Vcc - 0v GND - na GND - na GND - na 12Va- 0v 12Va - 0v GND - na GND - na |
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08-31-2016, 04:39 AM
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#3 |
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Leaking Member
Join Date: Dec 2014
City & State: Atlantic Canada
My Country: Canada
Line Voltage: Ground, 0Hz
I'm a: Hobbyist Tech
Posts: 5,683
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Re: Toshiba 50" 50L2200U (50M2U) Power Issue
There you go! It did post after all... As I already said in the other thread:
Your main board isn't sending BLon. So you got no backlights. |
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05-23-2022, 01:02 PM
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#4 |
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New Member
Join Date: Sep 2021
City & State: Altoona, PA
My Country: USA
I'm a: Knowledge Seeker
Posts: 6
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Re: Toshiba 50" 50L2200U (50M2U) Power Issue
I have the exact same tv but different issue. Mine doesnt turn on at all. I mean it seems dead as a doornail...lol. i have the 3 pins where you are to have 5 volts but thats it. So i ordered a power supply to only have the same issue so i checked the LED boards and here i found some bad LED boards. I ordered new LED boards and installed them to only get the same out come of no 12 volts. I put the original power supply back in with the sme results of no 12v. I even went as far as only having the power supply board plugged in and still no 12volts. And I even tried putting the origina board back in and same thing no 12 vots
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05-23-2022, 02:18 PM
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#5 |
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Badcaps Veteran
Join Date: Oct 2016
City & State: Bakersfield ca.
My Country: usa
Line Voltage: 120VAC 60Hz
I'm a: Knowledge Seeker
Posts: 2,901
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Re: Toshiba 50" 50L2200U (50M2U) Power Issue
What is your PWON in standby and after you push power button?
__________________
I assume no responsibility for any stupid suggestions I might post. |
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05-23-2022, 03:44 PM
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#6 |
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Badcaps Veteran
Join Date: Jan 2013
City & State: midwest
My Country: U.S.
I'm a: Knowledge Seeker
Posts: 9,971
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Re: Toshiba 50" 50L2200U (50M2U) Power Issue
simple things first, check all solder joints, retry, no joy, check all diodes and resistors on top of board first, check in circuit if any read strange report here, youtube is your friend for how to videos, examples of bad solder joints there: https://www.google.com/search?q=bad+...ih=607&dpr=1.5
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