Philips for Intel Socket 775 processor Service Manual page 26

EN 26 5. S/SD/HD 3.1 PDP
Some Vertical Lines don´t exists or are always on,
Adress Open
Line Open
Data Block Open
1/2 or 1/4 of Display is missing
COF Block Open
Logic Main / FFC
Check or change
interconnections
What is the status of
open?
1 Line
or 1 Block
No
Yes
Replace PDP NOK
Diagnostic software
Adress Open or Adress Short.
A part of the Display is not addressed
Adress open is related with
Logic Main, Logic Buffer
, FFC, TCP and so on.
Logic Buffer
Check Va Supply
Check and / or
change E / F / G
Buffer
Half Block /
Half of Screen
Yes
Replace Logic-Main/
Adress Buffer E or F or G/
FFC
Figure 5-13
Adress Short
Line short
Data Block short
Logic Main / FFC
Check or change
interconnections
What is the status of
Short?
1 Line
or 1 Block
No
Yes
Replace PDP NOK
Done
Adress short is related with
Logic Main, Logic Buffer,
FFC, TCP and so on.
Logic Buffer
Check Va supply
Check and / or
change E / F / G
Buffer
Half Block /
Half of Screen
Yes
Replace Logic-Main/
Adress Buffer E or F or G/
FFC