Nokia 3100,3120 auto power off, auto restart after press goto menu.
For this problem:
1. Check power button, replace if needed
2. if problem not solved, reflash / upgrade the phone with new version firmware
3. Software corroupt may cause cell phone auto restart
4. If the problem not solved, try to resolder Flash IC.
5. Replace Flash IC if needed. (rebuild imei needed after replace flash IC)
