wierd switch activity

[coops]

I have a small network of about 60 machines that connect via some unmanaged HP swiitches and a Cisco 1900 switch. This summer we moved the network around which cause lots of trouble with the CAT5 that had been in use sitting for 5 years. I have found out CAT doesn't like to be moved! The problem is that at least twice a day, the ports on the Cisco switch begin flashing wildly. they are green but flash much more than if there is normal activity. I have reset the switch a couple of times but it keeps coming back. And when this happens the network is inaccessable to any clients (win98 runing thru to a 2000 server)
Also when I try to connect a HP switch to the AX or BX port on the Cisco, it begins green then goes amber. Any idea what could be causing this and/or what to look for? Cables test fine 568B. It was working fine until the summer change....
many thanks
brent

[Train]

The cable maybe to close and are cross feeding. Whether it be the other cat 5 , phone, data lines, or powerlines, it is hard to tell. Anyway what it sounds like to me.

[jdc2000]

Also, if you moved some of the cables and they are now close to fluorescent light ballasts or other interference sources, that could be a problem as well.

[coops]

Yes I am thinking you are right jdc.
It is in an old school and it wasn't me who ran the cables so there a good chance they aren't run 100% correctly.
it is still amber but seems to be working.
i won't have time to check the route of the cable for a bit.