192 Troubleshooting ENWW
22 PARALLEL I/O
BUFFER OVERFLOW 
alternates with
To continue press 
Too much data was sent to the 
parallel port.
1 Check for a loose cable 
connection and be sure to use 
a high-quality cable. Some 
non-HP parallel cables might 
be missing pin connections or 
might otherwise not conform to 
the IEEE-1284 specification. 
(See “Ordering parts and 
supplies and getting support” 
on page 242.)
2 This error can occur if the 
driver you are using is not 
IEEE-1284 compliant. For best 
results, use an HP driver that 
came with the printer.
3 Press  (S
ELECT button) to 
clear the error message. (The 
job will not be printed.)
22 SERIAL I/O
BUFFER OVERFLOW
alternates with
To continue press 
Too much data was sent to the 
serial port.
Press  (SELECT button) to clear 
the error message. (The job will not 
be printed.)
22 USB I/O
BUFFER OVERFLOW
Too much data was sent to the USB 
port.
Press  (S
ELECT button) to clear 
the error message. (The job will not 
be printed.)
40 EIO BAD SERIAL 
TRANSMISSION
alternates with
To continue press 
The printer detects a serial data 
error (parity, framing, or line 
overrun) while receiving data from 
the computer. 
Press  (SELECT button) to clear 
the error message and continue 
printing.
40 EIO [X] BAD 
TRANSMISSION
alternates with
To continue press 
The connection has been broken 
between the printer and the EIO 
card in the specified slot [X].
Press  (S
ELECT button) to clear 
the error message and continue 
printing.
41.X PRINTER ERROR
alternates with
To continue press 
A temporary printing error occurred.
X can equal one of the following:
1 = Unknown misprint error
2 = Beam detect misprint error
3 = Media feed error (size)
4 = No VSYNC error
5 = Media feed error (type)
6 = ITB detection error
7 = Feed delay error
9 = Noise VSREQ error
1 Press  (S
ELECT button). 
The page containing the error 
automatically reprints if jam 
recovery is enabled.
2 Turn the printer power off, and 
then turn the printer power on.
41.3 UNEXPECTED 
SIZE IN TRAY [XX]
alternates with
LOAD TRAY [XX]:
[TYPE] [SIZE]
This is typically caused if two or 
more sheets stick together in the 
printer or if the tray is not correctly 
adjusted.
1 Reload the tray with the correct 
paper size.
2 Press  (SELECT button) to 
scroll to TRAY XX SIZE=. 
Reconfigure the size in a tray 
so that the printer will use a tray 
that contains the size required 
for the print job.
3 If the error does not clear, turn 
the printer power off, then turn 
the printer power on.
Message Description Recommended action