You are seeing the "Invalid Header" message on the LCD display on the T2250 because the pritner
is in "boot" mode, which is the firmware download mode and is detecting data being recived
is not a correct firmware file.
The most likely cause for this problem is the pritner
has defaulted to 'Firmware Download Mode" due to a problem with either corruption to the firmware or damaged / faulty EEPROMS
. When print jobs are sent to the pritner
is expecting firmware and recognises
the data it is reciving
is not correct for a firmware file.
The solutions to this problem are;
- Power the printer OFF, disconnect the printer from the computer system, and any external print server (eg JetDirect etc). Power the printer back on, if the error is resolved check the method of connecting the printer to the computer system to ensure there is no damage to cables etc.
If the printer displays "BOOT" on the display this indicates the printer is in firmware download mode.
- If the display reads BOOT first try reloading the firmware you may find details and firmware on the following web site,
- If loading the firmware fails this indicates a logic board fault, the main logic board would need to be replaced to resolve the issue