Question about HP Digital Projector sb21 Multimedia Projector

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HP sb21 lamp

Installed a new lamp, lamp does not start up. reinstalled the old lamp and got the same effect. prior to all of this the old lamp was working !!! do you know any one that repairs these units. Thanks in advance, DDiaz

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There is a very picky sensor on the lamp cover. When the lamp and cover are seated perfectly, your lamp will start.

Posted on Feb 06, 2009

  • Chris Hooper Sep 08, 2012

    How do I find the sensor and ensure it is engaged? I have the same problem with two projectors, after numerous lamp change attempts with a number of new bulbs. They can't all be duds.

  • Chris Hooper Sep 08, 2012

    Additional info: The projector acts like it is going to work. The blue light around the on switch is illuminated.the fan runs, and about a minute later, the defective lamp indicator illuminates.


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I replaced the lamp in my sb21, but now the right side of the projection is dark. left side is clear and sharp but starts to go dark about midway across. Could the new bulb just need to be cleaned?

Try taking the lamp out and reinstalling it - it may not be all the way in. If this does not help, a polarizer or filter may be bad. It's going to be hard to get replacement parts for this old projector that is at least 11 years old.
The only other thing I can think of is to try a factory reset - look through the menus until you find this.

Sep 29, 2016 | HP Digital Projector sb21 Multimedia...


Replace HP VP6321 Projector Lamp Models: HP VP6321 / HP VP6320 / HP VP6310 / HP...

Replace HP VP6321 Projector Lamp

Models: HP VP6321 / HP VP6320 / HP VP6310 / HP VP6300

Here are the steps to replace an HP VP6321 Projector Lamp:

  1. Turn off the projector and allow it to cool for 30 minutes.
  2. Unplug the power cord.
  3. Press the release latch (1) on the lamp cover and remove the cover (2).
  4. Press the release latch on the lamp connector and unplug the connector (3).

5. Loosen the two screws (4) on the lamp module, and pull out the module (5).


6. Insert the new lamp module into the projector and tighten the two screws.
7. Plug in the lamp connector.
8. Snap the lamp cover into place.
9. Turn on the projector. If the lamp does not turn on after the warm-up period, try reinstalling the lamp.
10. On the projector, press Enter.
11. Advanced setup, then Reset lamp hours.
12. Press Enter.

The lamp module has now been replaced and the projector is ready for use.

I hope that helps.
Download Hp VP6321 Manual here.

on Apr 23, 2010 | HP vp6320 Multimedia Projector

1 Answer

Hp sb21 out of sync

Are you simply feeding the projector with a video signal outside the range the projector can accept? For instance, trying to feed HD video to a projector that is not capable of high resolution can produce an out of sync image - or nothing at all.

I assume you've tried using a different video cable to connect to the projector, just in case there is a broken core in the original one that carried the sync signal?

Apr 05, 2014 | HP SB21 Multimedia Projector

1 Answer

Installed new lamp but Replace the Lamp prompt still displays.


Oct 16, 2009 | Epson PowerLite 822p Projector

1 Answer

How can i know the projector lamp age

go to the menu , check information or lamp timer . u will get the lamp hours.
u can also physically check the lamp for melted filament, white deposit on reflector of broken filament to confirm

Feb 08, 2009 | HP Digital Projector sb21 Multimedia...

2 Answers

Can't use my hp sb21 with my Macbook

it works if you do it in bootcamp. but have to select external monitor instead of digital display under the intel graphics control panel. does anyone know of such an option under OSX?

Jun 13, 2008 | HP Digital Projector sb21 Multimedia...

2 Answers

The Protectiopn circut is working

Hi there

Did you check that your lamp hours were actually reset ?

Mar 27, 2008 | Mitsubishi XL1XU Multimedia Projector

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