Question about HP LaserJet 2420dn Printer
49.4c02 Service Error
What is this error and how can I fix it?
The error means -
A critical firmware error has
1. After performing the actions
listed in the preceding item, if
the message persists when
using different software
programs and attempting
specific print jobs, disconnect
all cables that connect the
printer to the network or a
2. Turn the printer off.
3. Remove all memory DIMMs
or third-party DIMMs from the
printer. (Do not remove the
firmware DIMM in slot J1.)
4. Remove all of the
EIO devices from the printer.
5. Turn the printer on.
6. If the error message
each DIMM and EIO device
individually, making sure to
turn the printer off and then
on again as you install each
device. To replace a DIMM,
7. Replace the DIMM or
EIO device that caused the
8. Remember to reconnect all of
the cables that connect the
printer to the network or
9. If this error message persists,
replace the firmware DIMM.
10. Replace the formatter
Posted on Jun 03, 2008
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Posted on Jan 02, 2017
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