STB is a Huawei DN372T. Last apparently successful recording was on 15 February. Even apparently previously successully recorded unwatched programs won't play back. Also, previously successfully recorded and watched programs now won't play back (ie. SWMBO's locked recordings: she is not going to be happy). Scheduled and manual recordings by using both Guide/red R button and Info'/Set Recording all fail.
Lots of free disc space. No recording conflicts.
Hard power off/ons tried to no avail. Maintence reset just tried to no avail.
What else can I do to fix this? I can't afford a visit charge. Or, do I just have to get used to no longer being able to record programs?