Fixing dead Robe Colorspot 250at 

So glad it inspired you to fix yours :) Check "Allain The Brids" channel, he has plenty of repairs of expensive fixtures, lots of valuable info, that might teach you some good stuff

@@jordanwaeles sir can I ask where can we purchase the lamp for 250at? I have the same fixture with yours. It is still working but the lamp is already dead. Thanks in advance for the info.

Sure, you're looking for a Philips MSD 250/2 "Broadway metal hallide lamp", socket GY 9.5, or a GE CSD 250/2 (but the philips is superior in terms of light temperature and lifespan). I don't know where you're located, but us europeans can order it at Thomann.de, for example

HEAT and L ON were the messages indicating a lamp failure, yes. A101 just means it's set to DMX address 101, from what i remember.