240718: HjC
If you notice that a jet patch trigger starts giving high rates :
Check the L0 plots (https://online.star.bnl.gov/L0trg/pdf) for the run:
look at BEMC L0 Input plots first - If you see high towers then the problem is likely to originate in the detector. Call Oleg.

If the L0input plots look good (see for instance run25200008), then look at BEMC L1 Input plots -
if you see red marks at high level (above 50) in low-eta-sum or in high-eta-sum (like you see for 25200008) 
OR
if you see red marks in high tower bits (above 7) (again like 25200008)
then the problem is in the DSM tree.

If the marks appear in the L1 Input for BC101,102, or 103 then the problem is in BCE; if the marks appear in BC104,105, or 106 then the issue is BCW.

If you have identified the crate with the issue, then you can first try rebooting it. Try this a few times (<5) if you need to.

If the problem persists, you can try power cycling the offending crate. It often takes more than 1 (and fewer than 5) power cycles to recover operation.
   be sure to check its STP connection to verify it is at 0x100 at bottom of page  (https://online.star.bnl.gov/L2TimingPlotsCeph/stp2mon/stp2mon.html)

If you do not see red in the L1 Input plots, you may see it only in the L2 input. In this case, you may need to power cycle the BC1 crate.

Note that a red mark from the BCE or BCW seen in the L1 input will propagate to the L2 input but does not mean you need to power cycle BC1.  

If problem persists, call trigger expert