Question about Mitsubishi SL1U Multimedia Projector

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Overheating? I was wondering if the lamp is not good, would there still be a light and projection on the wall? Would this cause the picture not to come from the laptop, but still act as if there was a light? Also, the lamp warning light did not go on. Thanks

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Hi, you could use a high feet product from to keep the air going under the projector. some fan are place underneath which is not the best solution. 

Posted on May 20, 2009

  • bernard26 May 20, 2009

    Hi, you could use a high feet product from to keep the air going under the projector. some fan are place underneath which is not the best solution. 


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The lamp does not attempt to turn on anymore on my Runco VX-1C projector. Power to the projector is good but lamp does not turn on.

I was about to chime in that you should reset the lamp hours after inserting the new bulb ... until I read that you couldn't see the menu because the bulb still doesn't turn on. Hmmm...

Have you checked all of the filters to ensure they're free of dust build-up? I'm wondering if it overheated which caused the fault.

Due to the fact that this model is out-of-production your options have become limited. I recommend at this point you give them a call:

Tech Support at 800-23-RUNCO

Jan 02, 2015 | Runco Reflection VX-1c Multimedia...

7 Answers

No image

did you try to look on the manual of you projector? see also the connection of your laptop to your projection it maybe loose the cable on it. hope that helps!


Sep 19, 2008 | Mitsubishi SL1U Multimedia Projector

1 Answer

ASK Proxima C420 shuts down after 30 seconds. No indication of overheating or lamp problem.

Might be a problem with the video input. Try a different cable. If HDMI, you will need a really good cable for HDTV or 3D, and they are very expensive. My 12 foot cable cost $180.

Sep 12, 2014 | ASK Proxima C420 Multimedia Projector

1 Answer

Picture is not bright.

Several possibilities come to mind: How long since the lamp was replaced? They get pretty dim from about 2/3 lie onwards.

Is there dust in the optical path? If used in a dusty environment with no or clogged filters, you can get dust coating the optical components that will dramatically reduce the light output

Is the projector being used with a good quality screen? Projecting onto a plain wall or similar service will absorb much of the light and greatly reduce brightness and colour accuracy if the wall is not pure white

Did you see the projector when it was new, or have you acquired it second hand? These are not a really brilliant projector and you may be expecting more than it can deliver or ever could deliver

These are just the main possibilities that come to mind, but I strongly suspect your solution will be in here somewhere :o)

Oct 21, 2013 | Dell 1209S DLP Projector

1 Answer

I have an epson powerlite 825 projector. I recently replaced the lamp and it came on but i was getting the overheating message. So i opened it and air cleaned the fans and filter. Now i get a solid red...

Well hopefully you didn't over spin any of your fans. You can reset the lamp timer with the buttons on the unit, but you have to be able to project. Its in the menus at the bottom called reset. The 825 has an over heating issue. If its in warranty it should go in. I was able to get a firmware update for it but you'd have to push Epson tech support on that. I wonder if you didn't do something to the lamp cover it depresses a switch.

Dec 07, 2012 | Multimedia Projectors

1 Answer

What has happened when the color goes from the picture and you hear a humming sound and smell something that smells like overheating?

Check for colors for default logo display, different source like DVD player. If it is OK, then the problem lies in AV switching. If not, then go as follows. If it smells like overheating, then certainly there is overheating inside the projector. The overheating can malfunction the functioning of some sensors, ICs which can cause a problem like loss of colour. The projector gets over heated due to two problems. 1) The air filters are clogged with dust. Clean the filters. 2) The lamp life is almost over or used lamp is in use. Normally each lamp is used about 2000 to 3000 hours depending upon the manufacturer. In such case replace with new lamp. If this does not solve your problem give me feedback so that further solution can be provided.

Aug 07, 2011 | ViewSonic Multimedia Projectors

1 Answer

My projector has only just over 200 hours and is now showing a replace lamp message. The hours have also been reset???

The lamp hours might have not been properly reset.

1. Press the "POWER" button so that the projector projects the picture on the wall (projection screen)
2. Press the "MENU" button to show the "MAIN MENU"
Use buttons "F" or "G" and select "OPTION"
3. Confirm this by pressing "ENTER" so that "OPTION" is shown
Using buttons "5 / 6", select "LAMP RUNTIME" (lamp operation counter)
4. Select and press the "ENTER" button for at least 3 seconds
5. The "LAMP RUNTIME" (lamp operation counter) will change to "TIME RESET[POWER OFF]"
6. Turn the device off by pressing "POWER" and unplug the power cord.

Aug 01, 2011 | Panasonic PT-F200NTU Projector

1 Answer

Every 15 min or so my tv shuts off and a over temp light starts falshing on the front of my tv and the bulb has just been changed in january.

Looks, like one of your temperature sensors has been damaged. May be due to severe overheating by old lamp. Or: the lamp could be improperly installed. Heats up, then connections to ballast fail, lamp quit working. Next possible cause: did you clean air filter? Vacuumed or blow fans with compressed air? Another possibility: If there was not a significant dust accumulation inside of lamp compartment, the ballast board itself can be at fault. In any case, unit might behave the way it does now. Also: have you reset the lamp timer? In projectors, they won't just give you annoying message via "on screen display". It might think, that you never replaced the lamp, just took it out and put back in. You must reset the lamp timer first. The procedure could be in owner's manual or come with OEM replacement lamp. Generics or "bare" lamps might lack that note. Panasonic wants to stay in a business!
Good luck with your project,

Jun 13, 2010 | Panasonic PT-D5600U DLP Projector

1 Answer

The projector is starting up but after warming up it shuts itself off. It is not the a problem with the filter, lamp seating or an overheating issue.

Does the lamp actually light up and project? If not, it's probably a dead bulb. Are there any flashing lights that might be displaying an error code? How dow you know it's not overheating? Remove the filter and give it a good cleaning. Some projectors measure airflow and, even though the heat hasn't built up, the projector shuts down because it predicts overheating will occur due to insufficient airflow.

Aug 04, 2009 | Sharp Notevision XG-P20XU Multimedia...

1 Answer

Viewsonic PJ556d shuts down after 30-60 seconds

My solution sounds dumb, I had the same issue. Took the lamp cover off the bottom. The screws were loose holding in the lamp. Maybe they heat and expand and eventually work their way out and the lamp doesn't make good contact. Just tightened mine up, the unit would power off after 45 minutes prior. Been on now for 5 hours, no trouble.

Sep 15, 2008 | ViewSonic PJ556D DLP Projector

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