I have a Lattitude E6510 and a printer that has a firewire connection, no USB connection.  Can I use a 6 pin Firewire to USB adapter?  The reason I'm asking is because last time I tried this I blew the motherboard out of another Dell E6510 and don't want to do that again.  That laptop is completely dead, only the power button lights up for about 20 seconds, then goes out.  No HDD light, no screen, nothing.  It blew as soon as I plugged in the adapter to the left side USB, right above the ESATA port.  So shorted something out but not sure exactly what.

Anyone have any experience with firewire to USB adapters?

Thanks!