Lamp resistance and voltage

The Infocus X1 projector gives an indication that the "lamp is not firing after 5 attempts". Before I spend the money on a new lamp, can I check the Ohms of the lamp (I get infinite ohms) or can I check the voltage to the lamp (approx. 129VAC at the connector) to confirm that it is the lamp? It is alot of money to buy the lamp if the unit is at fault. In other words, is there a way I can confirm it is a lamp fault, or, could it just be the projector itself?
Thanks, Mike