ive now fried 2 pss-140 the first due too some very sloppy soldering the second due to buying the keyboard of ebay and not checking the output of the power supply that came with it. plugged in the supply turned on the power and various parts of the board started too smoke, bastard ebayers. it was made all the worse because i had spent 3 hours before hand installing the bends and had it working perfectly i only used the power supply because i was too lazy too look for some batteries.
im now bending my third and all is well, as the saying goes 3rd time lucky.