Who makes the Mitsubishi 915b403001 DLP lamps?

Mitsubishi doesn't make lamps for their DLP TVs! Philips is the original lamp manufacturer for your Mitsubishi 915b403001 Lamp. In rare instances, Osram may also be the original, but they still use a Philips lamp driver, or ballast, so it's best to replace with a Philips brand UHP lamp!

Mitsubishi 915b403001 replacement lamp Watch my demonstration!

How does the Mitsubishi 915b403001 DLP Lamp work?

  • Mitsubishi 915b403001 lamps are pre-charged with about 15,000 volts
  • There is no actual filament inside because it's a gas lamp
    (Hg - mercury vapor)
  • Mitsubishi DLP lamps will fail continuity test

How long do Mitsubishi DLP lamps usually last?

  • First Generation Mitsubishi lamps lasted from 2,000 to 3,000 hours or more.
  • Second Generation Mitsubishi lamps will last up to 8,000 hours.
  • Second Generation Mitsubishi lamps have better consistency.
  • All depending on your usage and the type of lamp you have.

What are the benefits of replacing the entire lamp unit (the lamp and the enclosure)?

  • Super quick installation.
  • Just pop the old one out, and the new one in.
  • Newer enclosures don't warp and are safer to re-use later.
  • The cost is now almost negligible. You'll spend only $15.00 more for a lamp inside the enclosure from Discount-Merchant.com.

How easy is it to replace just the lamp?

It can take anywhere from 5-15 minutes depending on your personal dexterity with a screw driver, but replacing a lamp yourself is very straight forward. I can do it in 5 minutes!

Whether you have a Samsung, RCA, or Mitsubishi, swapping out the lamp is very easy. The ballast wires don't even have to go in any particular order because most DLP's use AC (alternating current, for those tech-savvy people).

Where do I purchase the lamps?

Mitsubishi 915b403001, sometimes written as 915B403A01 can be purchased from many places such as Discount-Merchant.com, which sells bulb-only and lamps with enclosures for various TV models. I highly recommend them because they are one of the largest parts distributors in the United States with a very loyal customer base. Any company can sell you lamps, but Discount-Merchant.com also provides free technical support and same day shipping--just read their reviews online!

What TV Models are compatible with the Mitsubishi 915b403001 lamp?

These are the compatible TV models for this part number, you can click on the TV model number to access the owners manual

NOTE: You're not always going to be able to see the part numbers and you shouldn't worry about them. The complete cage part number is what matters and this is usually on the lamp housing and on the right side of your TV. It looks like:

Mitsubishi 915b403001 lamp enclosure sticker

Symptoms of a bad lamp:

  • If you hear audio, but have no picture
  • If you hear a ballast click, but the lamp doesn't ignite
  • If you can't see the lamp light up in the back of the TV
  • If you have blinking lamp indicator lights
  • Visual indication that the lamp is blown
  • Dim picture after years of use

Symptoms of another part malfunctioning:

  • Consistent or inconsistent clicking from the ballast
  • Screeching or winding sounds from the color wheel
  • No picture, no audio (possible power supply or ballast)
  • Blurry picture, or truncated picture (DMD or light tunnel)
  • No blinking lights, or different blinking lights
  • Spots or blobs on the screen (prevalent in LCD projection)

How do I take my enclosure out of my TV?

Mitsubishi 915b403001 lamp door
Unplug your TV set first and locate the lamp door.
Mitsubishi 915b403001 removing screws
1. Remove the screws securing the enclosure door.

Mitsubishi 915b403001 removing the door
2. Once removing the screws, remove the lamp door.
Mitsubishi 915b403001 locating the lamp
3. Inside your TV set you're going to see a plastic/metal case.

Mitsubishi 915b403001 taking it out
4. Gently pull the enclosure out.
Mitsubishi 915b403001 getting new lamp
5. Prepare your new enclosure to be installed.

Mitsubishi 915b403001 putting it back
6. Slide in the new enclosure.
Mitsubishi 915b403001 securing the lamp
7. Make sure you put the lamp correctly, you should feel a click at the end.

Mitsubishi 915b403001 closing door
8. Put the enclosure door back in its place.
Mitsubishi 915b403001 lamp panel
9. Put the screws that secure the door and that´s it. We're finished.

Mitsubishi 915b403001 lamp Click here to watch the video guide!

What do I need to replace my lamp?

What you'll need:

  1. Phillips screwdriver
  2. New DLP Lamp (You can buy it from Discount-Merchant.com)
  3. Gloves are recommended

Note: You should handle the bulb with gloves or a lint-free cloth. Oils from your fingers can damage the bulb!

This is what happens when you touch the lamp with bare hands

1. Oils from your fingers get on the glass of the lamp.

2. When the lamp is on, the oils help heat up that particular spot on the lamp, called a hot spot.

3. That hot spot can shatter the glass on the lamp.

NOTE: The lamp can still be usable, but there will be a noticeable shadow in the picture.

Mitsubishi 915b403001 - what not to do

Mitsubishi 915b403001 Replacement Guide

Mitsubishi 915b403001 lamp
Mitsubishi 915b403001 lamp casing
Mitsubishi 915b403001 casing
1. Let´s start by turning up side down the lamp, you´ll notice that the cage is secured by some screws on the top.

Mitsubishi 915b403001 lamp screws
2. To extract them you´ll need a phillips screwdriver.
Mitsubishi 915b403001 holder
3. In the inside of the enclosure there are some screws securing the holder around the lamp, remove them.

Mitsubishi 915b403001 lamp side terminal
4. Uninstall the screw securing one of the cables to the side terminal of the lamp.
Mitsubishi 915b403001 lamp top terminal
5. Now with a pair of pliers take out the nut securing the second connector from the top terminal.

Mitsubishi 915b403001 lamp holder
6. Remove the holder around the lamp.
Mitsubishi 915b403001 lamp replacement
7. Take out the lamp from the enclosure.

Mitsubishi 915b403001 lamps old and new
8. Ready your new lamp to install it.
Mitsubishi 915b403001 lamp enclosure
A. Place the new lamp inside the enclosure.

Mitsubishi 915b403001 lamp placing holder
B. Next, reinstall the holder in its place.
Mitsubishi 915b403001 lamp screwing holder
C. Secure it with the screws around it.

Mitsubishi 915b403001 lamp cables
D. Insert the screw that conjoins the side terminal of the lamp with one of the cables.
Mitsubishi 915b403001 lamp screwing cables
E. Install the nut on the top terminal to connect the cable with the top terminal.

Mitsubishi 915b403001 lamp cover
F. Now return the metal top to its original place and install the screws back on.
Mitsubishi 915b403001 replacement lamp enclosure
G. And you´re all finished replacing your lamp.

Mitsubishi 915b403001 lamp Click here to watch the video guide!
Symptom Remarks

1. TV takes an excessively long time to power on. • When switched on, the TV needs time to boot up, just as a computer does. Also, the TV’s lamp requires a few moments to heat up to full brightness. • TV Energy Mode is set to Low Power. Change TV Energy Mode to Fast Power On in the Setup menu.

2. You cannot program the TV to turn on automatically (Timer function) • The TV may be locked. • The clock may not be set. • TV Energy Mode is set to Low Power. Change to Fast

Power On in Setup menu.

3. The TV will not turn on after being plugged in. If light on front panel is blinking, wait at least one and a half minutes for the light to turn off, then press POWER again.

4. TV turned itself off and the light on the front panel started to blink. • Momentary power fluctuation caused the TV to turn off to prevent damage. Wait for the green light to stop flashing and turn the TV on again. • If the TV does not stay on, use the System Reset button on the control panel. If this happens frequently, obtain an AC line power conditioner/surge protector. • An unusual digital signal may have been received, triggering a protection circuit. Wait for the light to stop flashing and turn TV on.

5. TV turned itself off and the STATUS light is a steady yellow. • The TV has overheated. Clear blocked air vents and ensure at least four inches of clearance on all sides of the TV. • Clean the lamp-cartridge air filter. See Appendix D.

6. TV will not power off. Use the System Reset button.

Front Panel LED Indicators


TV is Powered off

TV is powered on.

Half Green
TV powered off, auto-on timer is set

Blinking Green
• TV just plugged into AC outlet. • AC just restored after power failure. • TV is rebooting after System Reset used. • TV is rebooting after power fluctuation or receiving abnormal digital signals from a digital channel or digital device. • You have begun the procedure to update software from an authorized flash memory device


Normal TV on or standby condition.

TV is too hot.

TV may require service

Half Red
TV may require service


Blinking Green
TV just powered off and lamp is cooling.

Lamp access door is open or not secure or no lamp installed

Lamp no longer ilimunates and has reached the end of the lamp life.

Comment on this article!

Any questions or comments are appreciated; I'll try to answer them as soon as I can! Simply drop me an email at adelauney84@hotmail.com. So, leave some comments!

  • How long has your lamp lasted? I've heard some lasting 15,000 hours!
  • Was it easy to install?
  • Who have you purchased from?
  • What's your experience buying online?

You can also sign up for our forums at FixYourDLP.com/forums for expert advice!

Comment Script


KSPQyB I'm not easily impressed. . . but that's impressing me! :)
#1 - Spud - 04/09/2011 - 20:47
This is no bargain, you can get the whole assy for $99.00.
#2 - K.C. Caldwell - 09/28/2011 - 14:39
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