Samsung HLR5078W Picture flickers after heat up
Posted: Fri Sep 11, 2009 12:09 am
All in all TV has worked well. I checked and I'm up to 13,000+ hours one first lamp. I first saw problems a year ago with unit shutting off automatically. Then some picture solarization and eventually picture flickering. Knowing that heat is doom to electrical components I used wire to attach two 80mm computer fans to back of set. As long s the fans run, the unit runs fine. Until recently when even with the fans on the picture started flickering again.
Troubleshooting:
1.Inital click of ballast is heard so that seems good.
2.Bulb lights up so that seems good (but I'll replace anyway with 13,000+ hours on it.
3. I can see the DMD gan spins wo that seems good.
4. I' switched between HDMI and Component so its not that.
I'm thinking its the DMD board or more specifically the chip thats on the board because it only happens when the unit heats up. Before that .. PERFECT! So I don't think its the light engine or the color wheel.
Any thoughts or experience.
Troubleshooting:
1.Inital click of ballast is heard so that seems good.
2.Bulb lights up so that seems good (but I'll replace anyway with 13,000+ hours on it.
3. I can see the DMD gan spins wo that seems good.
4. I' switched between HDMI and Component so its not that.
I'm thinking its the DMD board or more specifically the chip thats on the board because it only happens when the unit heats up. Before that .. PERFECT! So I don't think its the light engine or the color wheel.
Any thoughts or experience.