To dbman1207:
That's great that they acknowledged the problem on their part. Let's hope they don't take too long to fix it.
To axe1112:
I think that dbman1207 only has a 3500 so Bell ExpressVu might not know about your problems with the 4100. If you haven't talked to customer service, you probably should.
I've had problems recording on a 3500, but now I record on a 4100 on the same account with no problems. In fact, I just checked today's recording and it looks fine. I am using a VHS VCR though.
There are two ways to block recording from a cable or satellite set-top box or DVD player:
Macrovision has existed since the prerecorded videotape days. By corrupting the analog video outside the visible picture area, it causes VHS VCRs to record poorly, with the picture lightening and darkening over several seconds. Modern DVD-R and hard drive recorders detect this corruption and refuse to record.
CGMS-A is more recent. It is a code inserted into the Vertical Blanking Interval, the blank area above the visible picture. This area also contains other data such as the closed captioning text. While VHS VCRs are completely unaffected, DVD-R and hard drive recorders detect this code and refuse to record.
Both of these methods are transmitted outside the MPEG-compressed digital video data. The STB or DVD player has to generate these two signals directly, which is why software changes can affect the behaviour.
If your DVD-R hard drive recorder has worked perfectly until now, they must have turned on the CGMS-A signal for all channels on the 4100. If you have an old VCR, try recording to see if works on the 4100 and not the 3500. If so, this would confirm what I observe.
Are both the 4100 and 3500 connected to the DVD-R hard drive recorder at same time? If so, unplug the 3500 and see if you can record from the 4100 alone. Maybe the copy protection from the 3500 is blocking the recording even if the 4100's input is selected.