I would guess the popping/cracking goes away when the picture is present. Sounds like a high voltage arc either withing the tube or due to a cracked component in the high voltage circuit. If it's the tube, then the question is: how old is the set and is it worth it to sink $$$ into it as opposed to putting the same into another unit. If it is a defective component, that's much easier/cheaper to repair. Again, age of the set, etc. I hope this helps; definitly a repair for a pro.
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Most of the RCA GuidePlus Gold gemstar TVs worked with analog TV signals (NTSC) only. The Guide+ information was only broadcast in NTSC signals and is no longer being provided. If you can check the date of manufacture of the TV, you can use the size to check if it had an ATSC tuner added if it was made for the US market. 37"+ TVs had to have a digital tuner in second half of 2005. 25" TVs needed to have the ATSC tuner after March, 2006. The next year all TVs had to have a digital tuner.
I hope this helps. Please add a comment with the model number of the TV, if you would like me to confirm the tuner information on your set.
(The RCA F31317 TV with Guide+ was manufactured in 2000 and thus only has a NTSC tuner.)
hi....maybe theres a problem with your high voltage(flyback)section.or maybe there are still moist inside your tv...try to open it(if you can) and use your hair dryer to dry it....if noise still present after you done it....call the serviceman