From the Catalog of HR20 Bugs
Bug Name: Lockup AKA: Crash or freeze, remote not working
Prognosis: Fatal, Requires Reboot
History/Status: Currently active in 0x10b, experienced in every version of code. Also lumped in with BSOD
First Identified Report: 08-25-06, 08:39 PM by Gotchaa in "HR20 Owners BUG Reports" - System freezes, 2 so far: 1 complete freeze while watching recorded program, 1 freeze with active channel, but unresponsive from remote and panel.
There are eariler posts of freezing with the HR20 but there is not much supporting documentation.
Symptom: Remote and front panel is unusable, but video and audio will continue to play. This can happen on a full screen of video or in one of the menus where the video will continue to play in the PIL box. Often confused with a broken remote or bad batteries, this can be tested by trying to control the HR20 from the front panel, if the front panel also fails to control the HR20 you have locked up.
Common Example of user having the lockup bug from 0x10b Software Update Thread
Treatment: Requires rebooting