I have the above described dlp and it started to not work about a week or so ago... First, it would be fine, then after about 20 minutes, it would lose picture (still have sound), then shut off... I would turn it back on, only to have the same result. Now, it has gotten to where it won't come on (all three lights are blinking on the power button)... I checked the bulb, it "looked" fine, but...... The bulb has been replaced twice in 2 years and the tv is out of warranty...Can you help????
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The answers above are correct. It's either the lamp or the color wheel. Testing the lamp is pretty straight forward. Use an Ohm meter to see if the it's filament has continuity. It's unlikely that a good color wheel would fail immediately after changing the lamp. Look to see if some wiring is out of place and rubbing the wheel causing the noise you described. A jammed but otherwise good color wheel would cause the TV to shut down and display an error code.
Here is the procedure for resetting the lamp timer. This is a quick reference guide to show you how to reset your Samsung DLP TV’s lamp hour meter or hour counter. Resetting the counter is a very simple procedure. Begin with the TV powered off. Point your remote towards your TV. Press: Mute + 1 + 8 + 2 + Power.
Your TV set should now say “Loading Factory”.
Browse down to “Option” then press Enter (or the right cursor button).
NOTE: The Mute+1+8+2 buttons needs to be pressed down consecutively and fairly quickly. If your TV does not enter the service menu after using this combination, you can substitute MENU instead of MUTE. This seems to work for some sets. Also, the right cursor arrow also acts as the ENTER button, so try it if you’re having difficulty with the ENTER button. To exit the service menu, hit press the EXIT button or just turn off your TV (remember not to turn on your TV immediately afterwards!).
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same problem for me ... check out this thread on AVSforums about it.
I have the same exact tv as you and had the same problem. I took it to a repair shop who told me I needed a new DMD chip and that it would be 850 to fix. I used the information in thread above to get the part number and bought the chip on ebay for under 200. Here is a link to the listing CHIP
People have had good success. I will be replacing mine tomorrow.