I have a Mitsubishi model number LT55164 television. About five weeks ago I was watching TV and I heard a little pop noise and I lost picture and sound right after that happened. I brought the TV to a local repair shop and they told me that it was the main board . The repair man ordered the main board installed it and tested it and he called me and told me that they sent him a defective board and he told me to come and pick up my TV after he put all the original parts back in it. He told me that he could not find the part anywhere else. How can I tell if the new part that they sent him was bad or could it be my power supply board that is bad in stead cause he told me it is definitely the main board when I mentioned that to him any help would be greatly appreciated thank you
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Re: Mitsubishi TV Model LT-55164
If you post clear pictures of your circuit boards would be a good starting point.
Without any measurements it would be quess work at this point.Willing to help but I'm no expert. -
Re: Mitsubishi TV Model LT-55164
How do I upload pictures on this site. I have the photos saved in my iphoneLast edited by Nyjetfan21; 10-05-2017, 10:22 PM.Comment
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Re: Mitsubishi TV Model LT-55164
What tools do you have and know how to use them?
These look like to be your board:
http://www.shopjimmy.com/catalogsear...lt/?q=LT-55164
There are pin labels on the bottom side of the power supply board.
You will need to do good visual inspection and then check the fuses if they are good or not, check Voltages at various connectors and at the main filter cap of the power supply board, etc.Last edited by budm; 10-05-2017, 10:57 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Mitsubishi TV Model LT-55164
Does the front led power up and does it have a blink sequence, slow x fast
What dc voltages do you have at connectors PA, PB and PCAttached FilesLast edited by dick_barton; 10-06-2017, 03:14 AM.Willing to help but I'm no expert.Comment
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Re: Mitsubishi TV Model LT-55164
When the tv is plugged in the power light constintly blinks pretty quick.The tv wont power up or do anything at all it wont even respond to the remote.Comment
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Re: Mitsubishi TV Model LT-55164
Measure the voltages at the connectors and post your results.Willing to help but I'm no expert.Comment
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Re: Mitsubishi TV Model LT-55164
With the TV plugged in.At PB I have 5 volts, at PC I have 5 volts as well and at PA some pins are 5 and some pins are around 55 volts. I used the metal plate that all the boards are bolted to as a ground. Let me know if I did it right and what the next step should be. I did notice when the tv is pluged in besides the blinking green light there is a steady Blinking red light as well that the pc wire From the power supply board goes to this Board And it is covered with a metal shield and it says high voltage on itComment
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Re: Mitsubishi TV Model LT-55164
Next step?
Report the Voltage reading by including the pin name and follow by the Voltage reading:
Example:
https://www.badcaps.net/forum/attach...9&d=1507281259
PA connector
Pin 1 dimming = xxx V
BTW: this statement" and at PA some pins are 5 and some pins are around 55 volts."
Which pin is that giving you 55V?Last edited by budm; 10-09-2017, 06:59 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Mitsubishi TV Model LT-55164
I recently checked all the capacitors,fuses etc and everything had voltage going to them. The problem ended up being the heat sinks on the main board. So I popped the top of the heat sink off and put flux around the edges of the heat sink that is soldered to the main board and heated it up with a heat gun for a couple of minutes and let cool as well for several minutes. Turned Tv on and it worked.So I reinstalled the top of the heat sinks and put alittle hot glue on the to hold them in place in case the fall off the main board and short it out. Then I installed a permanent fan in the tv that runs constant off the power board to keep the tv cool and so far so goodComment
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Re: Mitsubishi TV Model LT-55164
Hopefully you'll have plenty of viewing time but it does tend to be only a short duration fix.Willing to help but I'm no expert.Comment
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Re: Mitsubishi TV Model LT-55164
Is there anything you suggest that i can do for a permanent fixComment
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Re: Mitsubishi TV Model LT-55164
You could approach people who repair X-Boxes and Playstations who would have the tools for reballing the BGA chipWilling to help but I'm no expert.Comment
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Re: Mitsubishi TV Model LT-55164
is that something that is expensive or is it something i can do myself and if so where can I get the partsComment
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Re: Mitsubishi TV Model LT-55164
It's something best left to the experts who have the tools and experience. I do not know what it would or could cost, however as I said your tv may work for days, weeks or many months so it was just to make you aware that it's rarely a permanent fix.Willing to help but I'm no expert.Comment
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Re: Mitsubishi TV Model LT-55164
ok ty for all the input.Ill keep you posted on what happens or I decide to do.TY to everyoneComment
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“DAOPAKMB6FO REV:F”
Below in smaller print is a small logo of I think a backwards R with the letter U with the left stroke of the...
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