This is likely a power board issue in the set. The power board may be faulty and an internal relay or other component is switching off the set to avoid any overheating issues. Check this board if you still want to service it.
SOURCE: color problems
IF you would like help diagnosing your set. Go to the enclosed link. They have the service manual for your set and offer unlimited chat support for only 10.99. Just click on your sets manufacturer and you will see your model. Then click on the contact us link and provide your email address and they will email your manual and instructions on how to obtain your support. I am one of their techs
http://servicemanuals.vstore.ca/
SOURCE: Blue horizontal lines and black color turn into blue color
Sounds like a convergence problem:
http://www.fixya.com/support/t257424-colors_out_alignment_curved_lines
SOURCE: RCA HD50LPW42. Sound so loud it sounds like a jet
You need a replacement color wheel or have yours rebuilt since the RCA color wheels are on nationwide back order. You can get your wheel rebuilt at the following link
http://servicemanuals.vstore.ca/
SOURCE: Screen went B&W and I hear a loud humming noise from the TV...
Hi John,
If you are hearing this noises,that's your Color Wheel.
The reason fot that is because your color wheel spins 5000rpms(revolution per minute) and something that modifies the balance if the disc can cause different things.Unfortunately in order to check if your color wheel is working properly you need to open your TV and physically check out.
Grinding= Most probably the color disc is broken and you need to replace it.
Spinning / Buzzing = The bearing of the wheel is loose and is loosing its balance,eventually it will brake.
The best thing to do is to take the color wheel out and spin it ,if you feel that the disc kind of wobbles or doesn't spin smoothly you have to replace it.
You can check DM they have very good prices
http://www.discount-merchant.com/SearchResults.asp?Search=samsung%20color%20whee l?click=52978
I hope this will help,please keep us posted
SOURCE: have picture, but no color and loud humming sound
the color wheel needs replacement. You can get a replacement color wheel at www.tvrepairworld.com
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