Look in the Events tab. Post what you find.

Try disabling ASICs. First, disable all but one ASIC. See if it starts up. If it does, then try enabling a few more ASICs, then a few more, etc. Eventually, you may be able to isolate one or two ASICs that are causing the trouble.

If you see "Loop serial failed X" messages, then you can start by disabling loop X, then re-enabling those ASICs one by one. If you see that message, you should also let Zvi know (and preferably also me by Skype; my Skype ID is jtoomim).

You're welcome to contact me on Skype if you want more advice. Zvi's rather busy, and I'd be happy to help if I can until he can get his workload under control again.