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73P3191 bare projector lamp
Fits 7 projector models from A+K · IBM · Lenovo · Microtek.
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73P3191 replaces the lamp inside IBM's C400 and ThinkVision C400 projectors, a model line that IBM later transferred to Lenovo, so the identical Lenovo C400 and Lenovo ThinkVision C400 also take this bulb. It also fits the A+K AstroBeam X420 and the Microtek CX7. Rated at 250 watts and 1,500 hours, it is supplied bare, without a housing.
No alternative part numbers are currently listed for this lamp, so 73P3191 is the code to check against your projector's rating plate. Because IBM's projector business passed to Lenovo, units badged under either name use the identical part, so do not assume an IBM-branded unit needs a different lamp from a Lenovo one.
At a glance
- Wattage — 250 W
- Rated life — 1,500 hours
- Type — Bare Projector Lamp
- SKU — LA-07857
- Compatibility — 7 projector models
Common questions
Why do both IBM and Lenovo projectors use this lamp?
IBM's projector line, including the C400 and ThinkVision C400, was later sold under the Lenovo name without changing the underlying hardware, so 73P3191 fits both the IBM and Lenovo versions of this model.
Does 73P3191 fit the Microtek CX7?
Yes, the Microtek CX7 is listed as compatible with this lamp, alongside the IBM, Lenovo and A+K AstroBeam X420 models that all take the identical 250-watt bulb.
Are there alternative codes for 73P3191?
No, this lamp is currently listed under a single part number. If your projector's documentation shows a different code for what appears to be the same lamp, check with us before ordering.
How do I fit a bare lamp into an IBM ThinkVision C400?
Unplug the projector and allow it to cool fully, then follow the ThinkVision C400 manual to release the lamp compartment cover. Fit the bulb into the existing housing, making sure it seats fully before securing the cover.
What counts as safe handling for this 250-watt bulb?
Avoid touching the glass envelope directly, handling it instead by its base, and never fit or remove it while the projector is still warm. Dispose of the old lamp through a proper recycling point rather than general waste.
This is a bare lamp — the bulb only. You reuse the housing already fitted in your projector.
Why do both IBM and Lenovo projectors use this lamp?
IBM's projector line, including the C400 and ThinkVision C400, was later sold under the Lenovo name without changing the underlying hardware, so 73P3191 fits both the IBM and Lenovo versions of this model.
Does 73P3191 fit the Microtek CX7?
Yes, the Microtek CX7 is listed as compatible with this lamp, alongside the IBM, Lenovo and A+K AstroBeam X420 models that all take the identical 250-watt bulb.
Are there alternative codes for 73P3191?
No, this lamp is currently listed under a single part number. If your projector's documentation shows a different code for what appears to be the same lamp, check with us before ordering.
How do I fit a bare lamp into an IBM ThinkVision C400?
Unplug the projector and allow it to cool fully, then follow the ThinkVision C400 manual to release the lamp compartment cover. Fit the bulb into the existing housing, making sure it seats fully before securing the cover.
What counts as safe handling for this 250-watt bulb?
Avoid touching the glass envelope directly, handling it instead by its base, and never fit or remove it while the projector is still warm. Dispose of the old lamp through a proper recycling point rather than general waste.
Other A+K lamps in the catalogue. Codes in the same family often differ by a single character, so check the part number against your old lamp before ordering.
