I have the exact problem with my L42WD22 RCA LCD 42"
I was watching a movie then suddenly the speakers went out, all the inputs stopped working, the rf receiver is working fine only with antena but will not take vcr or converter boxes, the only thing that is working is the vga that I use for my computer. there is immage but not sound same for digital channels. where can I buy that Fuse that went out? any help please.
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The two long LCD inverter boards are dead.Replaced the 2 long inverter boards will get ur picture back.Tries websites like Shopjimmy.com,Ebay.com to buy the 2 long board LCD inverter boards for the replacement.
I just fixed mine, I am not exactly sure what did it, but I held the power button down while pushing and holding each button for a few seconds after going through each button I unplugged power cable and then plugged it back in and it powered it up and it worked
These some use an EPROM IC pre-programmed, and like the pre-RCA, we went through many of these chips which just plug in and out, and sell wholesale from Main Electronic's in Vancouver BC Canada for $5.89 APPROX
First try resetting by unplugging totally from the AC, then reconnect and try again. if still no audio, check all inputs to make sure its not a bad cable/sat box , next check for a speaker switch either on the back of the Tv or in the menu. make sure the cable box and TV is not in SAP second audio program mode. if these all fail then you make need the audio IC replaced on the main board