Is it the dvd or the vcr mode that will not record? What source are you recording from - ie are you trying to record a channel that the tuner can read or is it coming from a set top box? Is the clock properly set for timed recording? This unit only has an NTSC (analog) tuner. If you are recording OTA from a converter box, make sure the correct channel/input is selected for the unit to see the content from the converter box.
If it's the dvd, make sure that there is sufficient space on the disc. Also check that the disc is not finalized and is compatible. Try a different brand. Is the machine recognizing discs properly? If it isn't reading any disc, then the tracking might be off or the laser needs cleaning. Try a cleaning disc but the unit may need service. DRM issues may apply for content from a set top box and block the recording to DVD.
If it is the VCR, then make sure that the tape has sufficient space left and that the write protect tab has not been removed from the cassette. (If it has and you do want to overwrite it, put tape over the opening.)
For timed recordings, make sure you turned off the unit after programming the schedule. You disrupt the timer when the unit is on. Power failures will also clear the programming if they last more than 30 seconds.
The unit was manufactured by Funai for Philips. You can get the manual here:
http://www.funai-corp.com/support/manuals.aspx . Search for the model number to get the PDF.
I hope these ideas help.
Cindy Wells