Samsung HL-P5085w No Image, Bulb fine

[Javadog]

Good Afternoon and thank you in advance for any help and direction you all may be able to provide.

Was pointed in this direction after another failed attempt to fix a broken DLP.

I am quite technical (run an IT company), and understand hardware quite well. The bulb in this I have replaced a couple times over the years and overall the unit has been ROCK SOLID. However in this last month now, the tv will turn on, you will get a picture and it will stay on for 2-7 minutes MAX, then the screen goes black.

Power is still on, if you push the source button, you can hear the tv switch sources. Lamp is still lit, but there is NO picture. Shut the machine down, turn it back on 20 minutes later, pic comes up, but as soon as (it seems to me) the unit gets warmed up, it goes into some sort of self preservation mode and shuts the image off the screen.

Thought it was a heat issue, took the back panels off it yesterday and used my compressor to get all the dust and dirt cleaned out of the back (there was alot), buttoned it back up and plugged it in......same issue...

No smell of ozone in there, using a flashlight I didn't see any capacitor that looked bubbled up (<--technical term), or blown. No scorch marks on any boards.

I am at a loss. I hate the idea of throwing this whole unit out. Buddy of mine pointed me in the direction of this forum, I certainly hope someone has some direction for me.

Thank you in advance for any help and direction.

-Java

[Village Electronics]

Re: Samsung HL-P5085w No Image, Bulb fine

I would suspect the lamp first. It never hurts to try a new lamp. Lamps are by far the most common problem. Even relatively new lamps fail. Lamps fail in different ways. Why are you sure the bulb is fine? Have you substituted it?

In most DLP failures for most brands the is a code generated. That code may be blinking lites on the front panel. Samsung uses that OR a combination lighting pattern on the front panel. Do you see any lights during the failure?

Another issue to consider is heat and fans. Fans must run to keep the TV on. Heat must be within tolerance. Sensors must be good. Power supplies to the fans and sensors must be good. Light engine failure is possible as well.

[Javadog]

Re: Samsung HL-P5085w No Image, Bulb fine

Thank you for your reply sir. Always appreciated to get some direction. However as stated, the lamp is a new lamp, one month old, and the lamp never stops firing. I lose picture, but the lamp is lit.

Verified the central fan in the pedestal-part of the unit is working too. I was concerned about the heat in the same way I would be about any of my computer servers. Got all the dust and any contaminant blown out so the unit is as clean as it can be internally where that heat would build up.

Color wheel seems to be fine too. Again, I am not getting any issues like a dim picture, or off colors, or bars of color on the system. The picture comes on, gets bright, is on for 2-7 minutes, and then the screen goes blank. Source button will switch sources, but you will never see what source is being displayed because nothing comes on, no OnScreenDisplay, menu options, nothing. The Screen Is Dark.

I still think something is getting too hot and the system is going into some sort of a self-preservation mode and shutting something off in the same way I would expect a CPU to shut down on the motherboard if it gets too hot. But maybe I am completely off base. Just trying to apply some of what I do know.

Anyway, I do appreciate the reply. But I do not think the lamp is the right direction.

Other ideas are certainly appreciated.

Thank you in advance for your time,

[raza]

Re: Samsung HL-P5085w No Image, Bulb fine

Hi Javadog,

I am having the same issue with my Samsung HL P5085W. Did you find the solution to it ?
let me know please [email]musi_raza@hotmail.com

[fikus]

Re: Samsung HL-P5085w No Image, Bulb fine

Hi. I have problem with my Samsung HL-P5085W,after changing the color wheel,the picture look that the green color too much.Do i need to adjust something after color wheel changed?Please look at the pic attached