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Is this a ground loop problem, or a broken color wheel?

post #1 of 6
Thread Starter 
We recently got a 50" Philips DLP TV (50pl9126d/37) and it just recently started making a loud humming noise. Our house is an older house (not sure the year, it is a rental). We have a coaxial that runs to our modem, and one that runs to our Dish TV Hopper. I'm not quite sure what it would be. It was working fine, and then today (after our landlord came and fixed a bunch of outlets in the house, since they were loose, and the one plugged in to the entertainment system was snapped and was sparking like crazy) it started doing it a few hours later. Can you help me diagnose which problem it is, whichever is easier?
post #2 of 6
Sure....unplug everything from the tv except power cord. Turn it on and see if it still hums. If it does, there is a problem with the tv itself. If the hum goes away, then you likely have a ground loop. You can try to isolate the source by connecting one item back at a time. Once you find which item introduces the ground loop, you can determine the best way to correct it.
post #3 of 6
Thread Starter 
I don't have to unplug anything from the wall? Well, I guess it makes sense haha. I'll do it anyway...

Darn, it's the TV. It even sounds like something is wrong with the TV when I get closer. So I guess I'll take it apart (Well, take the back off) to check if it's the color wheel, or if a fan is jammed, or if I put the bulb in wrong, etc.. :\ Does it matter I left the TV plugged into our 6 plug surge protector when I plugged it in? Should I take it out of that and see if it still does??
Edited by codywd - 7/17/13 at 7:19am
post #4 of 6
Yes, try plugging the tv power cord directly to the wall outlet. Sounds like you have a bad tv though.
post #5 of 6
Thread Starter 
Eh. I am 99% sure it is the color wheel. When I put my ear next to the Light Engine (or I assume it is, since the bulb shoots into it...) it gets much louder. Is there a way to fix it, or am I just kind of screwed?

https://soundcloud.com/allysman21/weird-tv-noise Here is the noise it is making. Is that definitely the color wheel, or could it be another problem?
Edited by codywd - 7/18/13 at 6:12pm
post #6 of 6
Most likely the color wheel. Best you can do is Google color wheel replacement for your model number and see what you find. It may be difficult to even find the color wheel by itself, then determining if it's changeable without too much hassle. Have you checked shopjimmy.com to see if he lists repair parts for your set? With Philips DLP's being somewhat rare, you may be out of luck.
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