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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
42" No Screen but has sound

 
 


09Challenger RT
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Jun 18, 2010, 10:32 PM

Post #1 of 2 (1403 views)
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42" No Screen but has sound Can't Post
I have a Digital Design's 42" bought from HSN Worked great for 2 years. Last time I turned on I heard a pop and smelled a burned electronic smell. I have sound and when I turn it on the Digital Design is displayed bright and clear across the screen and then it goes black.
I tore it down hoping to find a popped capacitor or something obvious like a black chared resistor or wire. I found nothing at all but I do see 7 boards. I replaced 1 for $30 (no luck) and ofcourse the rest of the boards are more expensive. This TV was $1,100 2 years ago and now they are like $600. I don't want to replace 3-4 hundred dollars worth of boards. I just want to know which one it is.
I am leaning toward the LC420WU5 BACK LIGHT INVERTER boards but there is a master and a slave board. I found both on ebay for $150. If I am wrong I will be out $180 now. Or I have seen these boards sepparate for about $60 but which one do I get or do I not need them at all?
I did notice the Master board has a bright blue light that turns on for a few seconds and goes out the slave does nothing. Is that light supposed to stay on or is the slave board supposed to have the light to?
Help



darstr
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Jun 25, 2010, 4:32 PM

Post #2 of 2 (1373 views)
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Re: [09Challenger RT] 42" No Screen but has sound [In reply to] Can't Post
Crazy You might be on to something with the inverters. I would get both, but inspect them very close first. If you can't find anything scarred or popped from the loud pop that you heard, I would be weary in buying them. Typicaly if you your backlights never turn on then you have inverter or power supply issues. If the turn on for a sec and then shut back off, that is normally a bad ccfl (or lamp) which would mean you have a bad panel. Good luck my friend

 
 
 


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