what's wrong with my ballast?

[Bryan]

Coil and core ballasts are quite reliable. There is little to them except winding around a metal core. If you have eliminated the bulb as the culprit it's likely the capacitor or in the case of a HPS ballast config the ignitor. Can you post the innards of the casing and I may be able to help you futher.

[crusty1]

Thanks guys! Brian, I will post a pic, but I won't be able to post it until tomorrow. Thanks for your offer to help me troubleshoot.