Brother MFC8420 Service Manual page 216

S-3 Although the USB driver is installed, it is unable to find the BRUSB: port.
(Windows98/Me only)
User Check
(1) Re-install, according to the instruction of the
(2) Try to connect the machine directly to the computer if it is connected through a USB hub.
Possible cause Step
Computer 1
Operating
System
Computer 2
settings
USB cable/ 3
machine
damage
subsection 3.2 in Chapter
Check
Windows 95 or Windows
NT4.0?
Does 'Universal Serial Bus
Controllers' appear in the
Device Manager tab of 'System
Properties' in Control Panel?
Does "Add New Hardware
Wizard" appears on the screen
or Does test print complete?
6-21
MFC-8420/8820D/8820DN, DCP-8020/8025D/8025DN
2.
Result Remedy
Yes Not supported.
No This problem can be caused
by your computer settings.
See the computer manual.
No The USB cable is damaged.
Replace the cable. If the
same problem appears, the
machine will be damaged.
SERVICE MANUAL