Have TV Questions? Ask a TV Technician
Hello , my name is JackPerhaps I can help you with this problem but first i would have a few questions so could you please send me a reply when you are ready to proceed ?
Thanks , a few questions coming up ;
Did replacing the inverters make any changes or this was the original problem ?
When this happens , is the screen just blank with some background light or completely dark like when the tv is off ?
Light through the vent holes ???
Do you get any picture when the tv is on or only " light throught the vent holes " ?
This is rather odd then but it looks like beside the inverters you also have a t-con board problems .
Usually backlights are on or off but do not "fade away" , did you try the flashlight test ?
If not then do you happen to have a flashlight handy ?
How did all this happen to start with , thunderstorm ,power blackout etc. ?
Right now it looks like this tv is seriously affected no matter what happened and its difficult to decide if the power board , t-con board or main board is at fault (beside the inverters )
Do you have a voltmeter ?
No problem , in any case I just looked at the power board and there are no voltages whatsoever marked down on it like there usually are so this would be chasing your tail if you are not "very" familiar with a voltmeter and what to expect to read on the power board .
Right now my first suspect would be that t-con board if you want to give it a shot .
There are 2 versions of it and the part numbers are CMO 35-D016766 (V420H1-C07) or CMO 35-D014118 for the other
You would need to check the numbers on the bar coded sticker on yours and with that number that board can be bought for around $35
I was actually getting down that path and even a bit further like ;
Is there any way you can return those inverters and get partially refunded if not completely ?
Where did you get them ?
What I`m getting at is that your tv seem to have a major sickness and you can buy a new 42" tv with all the bells and whistles for $300 or less while this one could cost you $200+ to have it repaired
Wish i had an easy solution for you today but i hope this still help figuring out your next step and I will be in standby if you have any questions.Thank you and please take the time to rate my answer if that answers your question and you can still reach me here at anytime after this chat is closed if you have other questions.
Please note that from where i`m sitting there is just so much that i can do and if you are going to rate my answer below O.K service then please do not rate at all , just let me know.
Fading out would be the t-con first then the main board but the voltages on the power board would need to be checked
Not sure if that helps but we are back at the voltmeter and/or trying a t-con board
If you don`t have any more questions for now then please do take the time to rate my answer , this is how I make a living and that rating gets me paid for my time.Also note that it will not close this post , you can come back here at any time if you have questions.Thanks for understanding .