DVD & Home Theater Gear Discuss DVD and Home Theater Equipment.

DLP Lamp problems

Old 06-15-09, 11:00 PM
  #1  
DVD Talk Special Edition
Thread Starter
 
Join Date: Mar 2001
Location: Iowa
Posts: 1,344
DLP Lamp problems

Hey all, I am hoping might some experience with it and be able to point me in the right direction. I have a Toshiba 46HM95 DLP.

A little while back, my TV started flickering and having display issues. I read around online, and found several suggestions. I wasn't sure what the actual problem was, but after returning from a trip this weekend, I went to turn the TV on and had the lamp finally go. It did not surprise me that this was the issue, as the TV is over 3 years old.

I found a new lamp in stock here in town and bought it today. I brought it home, installed and turned the TV, and everything was looking fine ... for about 10 minutes.

Everything was crisp and clean for a short bit (popped in a DVD to see how it looked, and flipped through channels). However, I then noticed some weird flickering to start again, and colors appear pixelated. However, this wasn't the same as before with my old lamp. For lack of a better to describe this, while the old lamp was dying, the flickering and problems almost seemed to be part of the picture, almost in the background. Now, the flickering more appears to be the screen itself, and almost appears at times like the lamp is too bright. I know, that explanation makes no sense.

Also, the biggest way this is different, is that before the flickering was reserved to the parts of the screen with picture (so with sides cropped, nothing noticeable appeared there). Now, the flickering is across the whole screen, and creating double/triple images of the picture.

So, I guess my first thought is that I got a bad lamp. If I turn the TV off and back on, I get a picture that is fine for a couple minutes, and then the flickering starts. It happens on all inputs as well.

Any thoughts on what has happened? I really don't want to call in service yet, as I was only just able to afford the lamp right now, and can't imagine paying them for something that may be as simple as a bad new lamp.
outer-edge is offline  
Old 06-16-09, 12:20 AM
  #2  
DVD Talk Limited Edition
 
Join Date: Mar 2002
Location: Mpls, MN
Posts: 6,831
Re: DLP Lamp problems

Double images does not sound like it could be the lamp. Everything else could be the lamp, although the side bars probably shouldn't be able to flicker in a DLP.
Spiky is offline  
Old 06-16-09, 01:24 AM
  #3  
DVD Talk Special Edition
Thread Starter
 
Join Date: Mar 2001
Location: Iowa
Posts: 1,344
Re: DLP Lamp problems

Since the one really bad instance of flickering that seemed to create double images (which it's not a true, permanent double image, it was somehow a result of the flickering, not colored, more just like flashes of outlines that were doubled, but appearing as the screen flickered ... sorry, hard to describe), it hasn't happened again. However, the flickering, brightness, etc. are all still there. :P

Is it possible that when the old lamp burned out it damaged something else? Wouldn't that be ovious all the time, instead of showing up a minute or two into the lamp being on?
outer-edge is offline  
Old 06-16-09, 11:03 PM
  #4  
DVD Talk Limited Edition
 
Join Date: Mar 2002
Location: Mpls, MN
Posts: 6,831
Re: DLP Lamp problems

The simplest explanation is usually correct. You have a new lamp, you have new issues. Probably related. And since an exchange should be possible so soon after purchase, I'd start there if it was me.

The lamp could have caused some damage if it exploded. But you didn't mention that, and it is not likely to cause damage in another way.
Spiky is offline  
Old 06-16-09, 11:17 PM
  #5  
X
Administrator
 
X's Avatar
 
Join Date: Oct 1987
Location: AA-
Posts: 10,738
Re: DLP Lamp problems

Flickering and having the old bulb go out and then the new bulb exibiting flickering problems could also lead to another simplest explanation, that there's a problem with the set that's affecting the bulb. So I haven't been clear on what the problem is in this case. But it's sounding like there might be something wrong other than the bulb.
X is offline  
Old 06-23-09, 07:07 PM
  #6  
cko
Cool New Member
 
Join Date: Jun 2009
Posts: 33
Re: DLP Lamp problems

I have heard stories about old lamps exploding when the burn out and causing problems elsewhere in the light engine, such as messing up the color wheel or other mirrors.
cko is offline  
Old 06-25-09, 10:12 PM
  #7  
DVD Talk Special Edition
Thread Starter
 
Join Date: Mar 2001
Location: Iowa
Posts: 1,344
Re: DLP Lamp problems

Thanks all for the responses so far. It seems to be exhibited some of the same problems as before, but more intense, with some new things. So, I am wondering if the old bulb exploding (the front isn't shattered, but the filament, etc. is completed exploded) did damage something else. The TV turns on and displays a picture, but quickly turns to intense flickering, which it was never quite like that before. I found a local guy who can come look at it for cheap and help pinpoint what's wrong.
outer-edge is offline  
Old 07-14-09, 09:36 PM
  #8  
DVD Talk Hall of Fame
 
Join Date: Jan 2000
Location: Somewhere out there... YES THERE!!!
Posts: 7,936
Re: DLP Lamp problems

From what I read it is not only the bulb that needs changed, but the ballast goes out eventually on those. The ballast is basically the power for the bulb. If it is putting out insufficient power it may be the cause of the flicker.
glassdragon is offline  
Old 07-14-09, 10:23 PM
  #9  
DVD Talk Reviewer
 
Boba Fett's Avatar
 
Join Date: Feb 2007
Posts: 6,084
Re: DLP Lamp problems

Out of curiosity, how much did you pay for the lamp?

We were told when we got our 46" Toshiba DLP bulbs were under $175. When the bulb went out the first time, it was nearly $300 (even the shop we bought it from was shocked and quit carrying the model afterwards due to the steep markup).
Boba Fett is offline  
Old 07-14-09, 10:41 PM
  #10  
DVD Talk Hall of Fame
 
Join Date: Jan 2000
Location: Somewhere out there... YES THERE!!!
Posts: 7,936
Re: DLP Lamp problems

Don't know your model number boba, but dlplampsource has the toshiba ones I looked at for like 189
glassdragon is offline  
Old 07-15-09, 08:45 PM
  #11  
DVD Talk Reviewer
 
Boba Fett's Avatar
 
Join Date: Feb 2007
Posts: 6,084
Re: DLP Lamp problems

Originally Posted by glassdragon View Post
Don't know your model number boba, but dlplampsource has the toshiba ones I looked at for like 189
I'll have to look it up, but I do recall finding that my TV had an odd lamp and that's why the price was through the roof.
Boba Fett is offline  
Old 11-04-09, 06:15 PM
  #12  
New Member
 
Join Date: Nov 2009
Posts: 1
Re: DLP Lamp problems

hi there, this lamp is different because is dc based and has polarity unlike other ac based rear projection tv lamps,this means that there is a POSITIVE and NEGATIVE terminal on the lamp itself.

this is the main reason why is different than the rest of the bunch out there.
zeppman1979 is offline  
Old 11-09-09, 04:57 PM
  #13  
Senior Member
 
Join Date: Jun 2001
Location: Florida
Posts: 268
Re: DLP Lamp problems

My lamp just blew out on Saturday - extremely depressing, needless to say - but the replacement is on it's way and should be here no later than Thursday. Hopefully, it will be an easy swap with no issues, but reading this has me worried a bit. Mine is a Toshiba as well and the lamp made it to the three year mark (almost to the day!)

*UPDATE*
Got the new lamp in and replaced it with no problems. Back up and everything works great! Checked the lamp hours and I got just under 5500 on the original lamp - not too bad, I guess.

Last edited by llandros; 11-11-09 at 06:08 PM.
llandros is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Archive Advertising Cookie Policy Privacy Statement Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.