LCD shows only squares

[EsotericLabs]

Hello Midiboxers,

My standard 2x16 LCD shows only squares on the upper line. It has worked before properly, I doublechecked the cable. I measured voltages on the J15A pins, Vss = 0V; Vdd= 5V; VO depends on the setting of the contrast pot, the same on the properly labeled soldering islands on the display itself.

Solved: the IC2 74HC595 was toasted. New one in and LCD working.

Edited November 3, 2012 by Martijn