how to stop constant reboot

[Android Question]

i have the htc incredible from verizon i keep getting the white htc screen and when i try to factory reset it it willnotlet me i get a phone with a red triangle and a red !!!! what is this and how can i fix my phone?

 

[Hadron]

That sounds like recovery mode. Press the volume up button and power buttons together and that should bring up the recovery menu, which will let you do a factory reset.