Which PC board needs to be replaced? How difficult?
It's actually not difficult at all, you drive it to any Honda dealership and ask them to fix it under the Honda extended warranty.
Why bother when you can get a free fix from your dealer? Googling before posting would have saved you the trouble of posting then waiting for an informed response. See here: <http://groups.google.com/group/alt.autos.honda/browse_thread/thread/6c0af46ea198e34/721e16263a1453e9?lnk=st&q=#721e16263a1453e9>
The car was at about 107,000 miles when it went dark. It is now at about 115,000. Just in for service for the first time a couple of days ago and they said about $200 and offered to get an exact price.