FORD technical service bulletin : ICC touch screen display

[hellrc5]

Originally Posted by XRPete

Hi JasonACT,


These boards could heating up enough to de-solder some points off the board slightly?


image

It is not because of the heat, that would require a few hundred celsius but because of the 'environment friendly' soldering material which contains no lead. Over the years plus vibration the solder joints become 'dry' and eventually they crack and intermittently or permanently stop conducting power, this broken solder is also known as a 'cold joint'.

Sometimes the crack is invisible or very hard to detect especially if is is sitting on the bottom side of a BGA chip (it is sitting on a number of tiny solder blobs) an often affects more than one components.

Not so surprisingly old equipment from pre 2000 era almost never fails this way.

Sent from my Note7 FE - Flames Extinguished edition