If the 4347-i08 is connected to a computer system when it displays the HDW TRAP error when powered on I would recommend disconnecting the printer from the computer system, then power the printer ON as a free standing printer. If the HDW Error is seen when you power the printer on when it is not connected to a computer system or print server, this indicates there may be a fault with the printer. I believe the "HDW TRAP" error is displayed due to an unhandled error in the printers firmware. There may be a number of causes for this error, if this error is seen when the printer is free standing and not connected to any computer system, It is worth checking the following; Check the print head is correctly seated in the printer and is free to move. Check the paper path to ensure there are no obstructions to paper motion. Check all electrical connections. Check for any thing which may cause a short circuit within the printer, ie loose wires, foreign bodies etc. Check the main logic board connects to the interconnect board and ther are no bent pins etc. If you continue to see the error when the printer is not connected to the computer system, it is likely the printer is relatively new as the model is relatively new therefore should be covered under a warranty in most classes, it may be best to contact your reseller or Dascom, the manufacturer directly. If the printer powers on ok free standing then this indicates there may be a connectivity or data format issue. Try printing a menu print on the printer to see if it is capable of printing. If the printer is connected via the parallel interface either directly to a terminal or to an external print server like a JetDirect, the problem may be caused by bi-directional communication disrupting the printer in an unexpected way. You can disable Bi-Dirctional communication, I believe this will be called Cx-Bid within the extended menu on the 4347. To change this setting; Power the printer on holding down the ONLINE button. When the printer finishes initialising release the ONLINE button Press the button order NEXT on the display (button 4) repeatedly until you see CX-BID on the top line of the display. Press the button under CX-BID to select the option Using button 2 or 3 change this setting to OFF Press button 1 under SET to save the setting. Cycle the power on the printer. On any external print server you may also need to set the parrallel interface to a Uni-Directional type. If the problem is only seen when print jobs are received from the system, check; The driver or device type selected on th host system Ensure the emulation selected on the printer matches the host system, and vice versa. Try printing a plane text file to the printer to see if this will print this will identify if a particular job is causing a disruption. If the printer is replacing a pre existing printer, ensure the menu setting on the 4347 are set up in the same way as the old printer. If the problems continue perhaps if you advise how the printer is connected and to what sort of system and when the error is seen I may be able to offer some additional suggestions. In the meantime I hope this is of some help.