This flex is the 4-wire touchscreen connection.
If this has been disturbed it is conceivable that it could contribute
to the infamous 'jaggies' that a lot of people are experiencing.
As I follow the threads on this subject, it seems that people are generally
experiencing this after an upgrade or screen replacement.
The board is certainly removed for screen replacement and may or may not be
removed
for memory upgrade (depends who does it).
The flex connection, as has been observed, is a compression type and relies
on
the intimate contact of two surfaces. Oxidation of the contacts on the flex
is a real possibility.(Don't do repairs while eating Doritos;-))
Be careful out there...
Regards,
David Humphreys
PCB Designer
Honeywell Inc
mailto:david.humphreys@honeywell.com
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