Toshiba BDX2500KU Service Manual page 42

LAN port no output.
Check whether IC4001 Pin W21,
W22,V22,V21,arrive the J2001
pin4,5,1,2.
Check whether bad solder
exists on J2001.
Replace IC4001 or Main board.
LAN no output.
Go
Yes
Yes
11-2
No
Correct connection.
No
Replace J2001.
Trouble shooting chart