MiTAC 7521 PLUS/N User Manual

131

When a print command is issued, printer prints nothing or garbage.

PIO TEST ERROR

1. Check the PIO device is installed 

properly.(

J505

)

2. Confirm CMOS LPT port and 

extended mode setting properly.

Test

OK?

Re-test

OK?

Replace M/B or go

into board-level

Troubleshooting.

NO

YES

NO

YES

Correct 
it and end.

Change the
faulty device
then end.

Board-level

Troubleshooting for

PIO test error.

Check the following parts for cold solder or one of the following parts
on the mother-board may be defective, use an oscilloscope to check 
the following signal or replace the parts one at a time and test after 
each replacement.

Parts

:

J505, C5
U27, L1
FA1, FA2
FA3, FA4
FA5, 
CA3~CA6

Signals:

P_STB#
P_D/AFD#
P_D/ERR#
P_LPD[0:7]
P_D/INIT#
P_D/SLIN#
P_D/ACK#
P_D/BUSY

P_D/PE
P_D/SLCT

Try another known good PIO device.
(Such as printer)