Help! Hi8 tapes not working

[bwd20]

I have an old Hitatchi Digital 8 x 500 Video camera. Used it for several years to record family videos. When I try to play some of the tapes I either get a blue screen or a blotched screen where the video appears to play but in small patterns.
My hope is the tapes did record info, but perhaps not compatible in playback mode? tapes are Fuji HiQuality 120 or Sony Hi8 MP.
Anyone seen this before?
Thanks for helping!

 

[kenrivers]

Have you tried cleaning the video heads? There is a cleaning tape available to do that job. Make sure you follow the directions carefully as overuse could damage the heads.