v880 can't pass the post

@(#)OBP

 hi, all. v880 can't pass the post,here is the log, as the follow messages it is the io board problem? 

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Hardware Power On

@(#)OBP 4.10.8 2003/07/25 08:42 Sun Fire 880

Front Panel Keyswitch is in Diagnostic position.

Online: CPU0 CPU1 CPU2 CPU3*

Validating JTAG integrity...Done

Disabling DAR error circuitry...Done

Clearing DCS error circuitry state...Done

Initializing DTL circuitry state...Done

Initializing MDR via JTAG...Done

Enabling DAR error circuitry...Done

Probing Motherboard....part# 501-6323-05 serial# 030141

  Safari min 100MHz, cumulative 100MHz;  max 150MHz, cumulative 150MHz

  'STICK' clock 10MHz; BootBus timing 014f.99fd.a7e6.3f29

Probing I/O Board......part# 501-5142-19 serial# 063714