The HSL I/O bridge/RIO adapter hardware in a system or I/O unit is failing.

Follow this procedure to identify the failing component to exchange.

1. Are you working from the serviceable event view and a card location is listed with this FRU?
   • Yes: Then the listed card location is where the error is located. Continue with the next step.
   • No: Record the bus number value, BBBB, in word 7 of the reference code. Word 7 of the reference code allows you to determine the correct bus number, bus type, multi-adapter bridge number, multi-adapter bridge function number, and logical card number from the Direct Select Address (DSA). See the section entitled, "Breaking down a RIO/HSL or PCI bus reference code" in the service guide for the system unit on which you are working. Search for the decimal bus number, using one of the following, to determine which frame or I/O unit contains the failing item.
     • the HMC's system configuration user interface (if an HMC is controlling the system)
     • i5/OS^® Hardware Service Manager (HSM)
     • or the System Configuration Listing
     Record the unit type or feature and continue with the next step.

2. Use the following table to determine the part number for the field replaceable unit (FRU):

   CCIN or FFC	Type and model	Part number	Description	Location code
   	8204-E8A	10N9369	System backplane	Un-P1
   	9406-MMA, 9117-MMA	42R7352	I/O backplane	Un-P1
   	5790, 7311-D11	03N5633	RIO/HSL adapter	Un-P1-C7
   	0595, 5095, 7311-D20	39J0523	RIO/HSL adapter	Un-P1-C05
   	5796, 7314-G30	10N8782	RIO/HSL adapter	Un-P1-C7

This ends the procedure.