Digital BW, The Print

A friend has lent me a 2200 for testing QTR with.  It hasn't been used 
for some time and has the predictable clogs.  In the process of getting 
it up and running, the yellow ink cart has run out of ink.  I have 
replaced it with a new cart (OEM), but the printer is still indicating 
that it is empty.  I have run through the Epson trouble shooting tree 
for this (reistalling, shutting off power, etc) and have reached the 
point where they suggest calling tech support.  Any suggestions until 
tech support opens on Monday? 

Thanks,
Peter