TV Repair Questions? Ask a TV Technician
Hello JA Customer I have been fixing Tv and Electronics since I was 5 years old With better than 20 years experience and 17 years in business
It sounds like you have an Inverter failure have you changed the Inverter Board?
This does not look like the power board contains the inverter it would be a strip board on the side
is there a way to verify under simulated load that the rest of the boards are OK.
is this the board you suggest I purchase?
Why do the relays not click under no load?
Should I be able to verify defective inverters with an ohm-meter?
no you cant
can't what? I asked many questions
can you take a pic of the back of the tv so i can see the boards in this model?
yes, How do I send you the pic
there is a paperclip icon to attach lets try that first
if not i can give you an email adress to send to
It will take me a few minutes
The board all the way to the left of the pix is the one i am thinking of is there another on the right?
Yes there are boards on both sides. Do you want me to remove the metal shielding? I sent you a link to an eBay listing. Is that the same board? What do you want me to do
this tv has them both sides you have to change both
pull the shields off and look at the boards see if it matches what you are looking at
it could be diff
just becuase the model matches doesnt mean its the same
OK, I will do that in the morning. Why do I have to replace both? If I seen a burn spot on one board but not the other, what should I do? Can I ohm out each transformer coil and replace just the bad ones? Can you sell me just transformers and I replace them, or can I buy them from DigiKey or someplace else?
show me the burn spot ....
you change both just to make sure you dont have an inverter issue unless you see somthing like a burned spot
they are very hard to trouble shoot
sometimes a transformer will ohm out diff than the rest of the board but many times you dont get these clues and the board is still bad
All the lamps must light or the lamps will shut down in a few secs
Can I disconnect either or both of the boards and power up the TV and see if it powers up with only a partial load? Where should I measure the resistance of the board as a whole and then what are the resistance values I should see of the transformers?
no it wont run
I don't understand the advice to buy 2 new boards. Why not determine what component has failed before a "replace everything" solution is your suggestions?
needs working boards to run disconeting them will tell you noithing
becuase the goal is to fix the tv
not waste time
replace it all at once
No, the goal is to save money, not time
and you can guess wrong
you cant get parts for inverter boards
do you have the parts?
why not put in a 10 ohm 100 watt resistor (or whatever it needs to be) and see if that allows it to power up?
ok you can do what you want
i am opting out of the question
maybe someone else will help