Second lamp that has blown on my projector in 2 weeks?

About two weeks ago, my Sharp projector PGC20XU blew its lamp. I received a replacement lamp and within 2 hours of use, the lamp blew again. The supplier of the lamp asked for a technician to check the projector's internal output to the lamp before they could supply a replacement. How do I check the projector internal output? I am technically inclined and have done electrical/electronic work like this before. I live about 3 hours drive from a major city and would prefer to do it myself.