I have started to see horizontal lines appear on the screen when viewing the cameras (see attached). When I look closely, the lines on one display are from a different camera image. The lines are not permanent, they appear intermittently, when I playback the lines are always recorded. The screenshots shows only a few lines, but sometimes the image is almost obliterated with horizontal lines.
The PC is an Intel Core2 Quad CPU Q9450 with 4GB of RAM and a NVIDIA GeForce 8600 GT graphics card. The OS is Win7 pro 64bit.
On one of the screen grabs, you can see a error message showing 'dvr error', I can't find any explanation in the manual explaining what this refers to; could it be linked to the horizontal lines?
I have tried moving the NV3000 card to a different PCI slot, this stopped the lines for a couple of days but they have come back again.
The card has worked fine for the last 18 months, can anyone help?