Question about Samsung DLP HL-P5663W 56" TV
My Samsung 46" DLP TV when turned on gives a "weak or no signal" message on the screen. I get no picture and no sound, just a blue screen. But when I press "PIP" (picture in picture), I can see picture from a cable channel. The TV is very bright when turned on, so I don't think it's a lamp issue, but don't know for sure. I wonder if anyone out there knows if this is a lamp or a video signal issue?
This is a possible fault in the power supply, and can be a problem with some decoupler caps on some of the boards. The vertical bars and unstability are usually attributed to having high frequency noise and or clocking pulses crosstalking on to the power distribution lines that run through the boards. This can be switching power supply noise, or cross-talk from clocking pulses.
Another thing that can cause your described fault is unstable clocking between the devices that are reading and writing to the data busses. There are a number of data busses running through the set for the boards to be able to communicate with each other.
The tech will use the process of board swapping to service the set, and then do the adjustments as necessary to make sure the new boards match up.
Yes... DLP sets are fairly expensive to service!
This is my personal opinion. If the set is out of warranty, I would change for a Plasma or LCD set. If you compare the performance of these to ther DLP, the difference is very big. From what I am seeing from a service point of view, the DLP's are lower in reliability.
Posted on May 06, 2008
SOURCE: Samsung DLP HLM-617W/XAA
with lamp out (door closed) the ballast should "strike" or give an arc sound, trying to fire the lamp. If it does not do that maybe the color wheel is not spinning up - has to do that first.........then the set will try to fire the lamp
Posted on Jul 29, 2008
That sounds most like the color wheel,
to change that you need to have some skill in electronics, I would recommend to take it to a shop
Posted on Apr 25, 2009
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