My TiVo box keeps crashing up to 5 times per hour.
All pictures will freeze and the box then becomes unresponsive. If I try to change the channel using the channel up or down button on the remote it will go blank. The only way to get it going is to turn the box off at the wall. It will crash again.
Other times (but more rarely) it will go off and all the lights will come on and then start the reboot procedure.