Thierry:
Unless the heads were broken by improper cleaning or a severely damaged
tape, the video heads usually do not fail all at once. Usually they
gradually produce a less clear picture and tracking becomes critical to
the point that the streaks and lines can not be eliminated.
If it is a 4 head VCR it would be very very unlikely that both the SP
pair of heads would fail at exactly the same time as the SLP/EP pair of
heads. Usually the SP heads go first. So a good test here is to try
pre-recorded known good tapes in both SP and SLP/EP speeds. If both
speeds produce snow then I would say that you need to continue trying
to carefully clean the video heads again, and again. For the proper
and safe instructions you should go to the website for this newsgroup
at
http://www.repairfaq.org/
Plan to spend some search time there.... lots of good information.
electricitym
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