|Your question lacks detail. If you'd like an actual helpful response how about filling in some blanks.|
- Is this a newly installed printer?
- Is this a network printer (ie: plugged directly into the network) or is it connected to a PC and shared?
- If the printer's been installed for a while, did it ever respond to pings before (not all do)?
- Can you print to it even though you can't ping it?
- Was it working and then it stopped?
Let's start with that............