If you think it is power related have you checked to see the power on the switch?
show environment all
This will show you the switch details of the fans, power supplies, etc...
What does sh ver indicate?
Cisco IOS Software, s72033_rp Software (s72033_rp-IPSERVICESK9-M), Version 12.2(33)SXI3, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Tue 27-Oct-09 11:12 by prod_rel_team
ROM: System Bootstrap, Version 12.2(17r)SX5, RELEASE SOFTWARE (fc1)
hscdow01-cr-02 uptime is 1 year, 41 weeks, 6 days, 10 minutes
Uptime for this control processor is 1 year, 41 weeks, 6 days, 4 minutes
Time since hscdow01-cr-02 switched to active is 1 year, 41 weeks, 6 days, 5 minutes
System returned to ROM by power cycle at 15:12:14 EST Mon Mar 8 2010 (SP by power-on)
System restarted at 10:51:48 EST Tue Jan 25 2011
System image file is "sup-bootdisk:s72033-ipservicesk9-mz.122-33.SXI3.bin"
Last reload reason: Reload Command