RD53 Disk Not Rotating

there I have been desoldering the power transistors and testing them with a DMM using the diode tester. There are eight in all, four test OK as two diodes. However, the other four are marked 8702 TIP125, have a Texas Instruments logo, and do not test as two diodes. Looking at the datasheet here http://www.datasheetcatalog.org/datasheet/stmicroelectronics/4128.pdf it would seem that it is not they are not simple transistors and so perhaps my measurements are showing them to be working OK. Here is what I measure with the diode tester: 1st - b-e 1.95V e-b 0.82V b-c OC c-b 0.66V c-e 0.58V e-c OC 2nd - b-e 1.91V e-b 0.83V b-c OC c-b 0.68V c-e 0.58V e-c OC 3rd - b-e 1.90V e-b 0.81V b-c OC c-b 0.67V c-e 0.59V e-c OC 4th - b-e 1.75V e-b 0.75V b-c OC c-b 0.56V c-e 0.58V e-c OC It looks like the 4th one is slightly different to the other three, but I have no idea if this is far enough out of tolerance as to cause the motor not to turn. Can anyone tell me if those values look OK, or what else to look at on the motor control board? Thanks Rob