I seem to experience this problem on all HD2s. I activated the phonelock on HD2 and used a simple PIN for unlocking it. When I'm in the LockScreen, keying my PIN, the phone goes to suspend mode (or it seems like it, since the screen just blacks out and i need to press the power button again to see the lockscreen) after about 13 sec, everytime. This phenomenon happens only when phone is using battery power. It works fine when running on external power.
Is there a way disable this issue, or extend the time it blacks out. I'm using the default WM6.5 rom 1.66.707.1
Please help, Thank you.