Having problems finding disks that will workto record

I’ve had this resorder for some time (lvw-5005) and I used the cheapest disk I could find.Most of the time I used silver top, but now it seems that nothing wants to work.Will a firmware flash help this problem?
Thanks in advance

first try quality media of different types -R, +R, +RW if still no joy clean the lens and retry. you may need to replace the DVD drive.