G4 powerbook logic board

I just replaced the logic board on this machine. All went well, except for now the fans run wide open all the time.
JLen7 wrote on :

I just replaced the logic board on this machine. All went well, except for now the fans run wide open all the time. Reset pram and re-checked connections, and tried changing OS settings, but problem persists.

Any suggestions?

Thanks in advance,

James