KDL-42W805B - Sony TV Service Manual (repair manual). Page 16

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KDL-42W805B 12
SECTION 3 - REPAIR INFORMATION
5.  Locate and remove screws from the Tuner Board and Main Board, then 
lift to detach.
6.  Install the new Main Board and/or Tuner Board and screws.
7.  Reconnect the LVDS Cable and all other connectors.
8.  Update the Software.
After ALL repairs UPDATE the SOFTWARE to the latest version. 
Instructions are included with the Software package on the Sony 
website.
a.  Insert the USB device with the latest Software into one of the TVs’  
 
USB ports.
b.  Connect TV to AC power.
c.  Wait at least 20 seconds.
d.  PPress Power 
I/0
 on the TV to turn it ON..
e.  Wait until the Software update is completed.
REPLACING THE MAIN BOARD / TUNER BOARD
The Main Board used in these models is available for repair. For Part 
Number information refer to
 
Section 4 - Exploded View/Part Number 
Information on page 18.
1.  Disconnect Harness from the Main Board. 
2.  Locate and disconnect remaining connectors.
3.  Press down the 2 locking clips and pull LVDS cable to release.
4.  Slide brackets to detach from Main Board.
Side 
Bracket
Side 
Bracket
Under Bracket
Under Bracket
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