There are actually 3 light guns (or as you were told, "light bulbs") in your projection TV, and if one of the guns was failing and making the noise, you only had a one in three chance of fising the problem if you replaced only one "light bulb".
SOURCE: Television does not work
Definately sounds like the light engine. that is an expensive part about 800.00 wish I could be more positive but I believe thats what you'll find needs replacing
SOURCE: rca scenium 52 in dlp tv made pop noise now sounds like a clicki
very common problem for your model You will need to replace the flyback. Your model uses the 259296 flyback. You can get a replacement flyback at the following link with free insstallation instructions with pictures so you can easially fix it yourself. Read the reviews on the flyback to get an idea on how easy the repair is. Heres the link.
http://servicemanuals.vstore.ca/
SOURCE: rca 52 inch power light comes on no pic.,shuts off makes noise
I think you have a shorted hori output Transistor NTE2324 if it makes a low squealing sound also ck capacitor 114,120,150 if 150 is puffed up on top it is bad 2200uf 16v use 25v and other 2 are 220uf 35v.
SOURCE: RCA W40D20 HDTV intermittent flicker and it gets blurry
loose connection on ends check you hdmi cable vga cable and vgi cable so the pins are good or not bent try to borrow another and see if it changes it and dont go to far from your tuner .
SOURCE: 50 inch rca dlp tv. new bulb. makes a loud
Color Wheel needs to be replaced. Call PartStore.com
1-866-925-7278 For Part number go to Encompass Parts Distribution they will list part number.
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