L1011 - Cannot set V2+70 in AOA Mode

[KSJ]

L1011/Standard/FDs ON, before engine start - Can't Set V2+70 / AOA. Pressing TOGA button on yoke locks out the speed setting knob when showing AOA. Initially the display shows IAS 100. If I change the speed (to say, 217) pressing TOGA button changes it to some seemingly random speed and, again, the knob is non functioning and it cannot be changed. What may I be doing wrong??

Edited Thursday at 10:49 PM by KSJ
clarify title

[cvqueiroz]

I noticed the same behavior ...