please help ! screen rolls on rear projection

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ecbb
please help ! screen rolls on rear projection

1996 hitachi ultravision screen rolls but can be stopped sometimes by moving the tv or bouncing on the floor.

vossyd
I have a Hatachi ultravision

I have a Hatachi ultravision model #50UX14B
the screen keeps rolling from top to bottom ,
only stopping for a few seconds at a time.
It seems to be a horizontal hold problem but
i'm not sure how a projection tv works.Can
anyone help.
Thank you

JerradsDad
ecbb, Your set most likely

ecbb, Your set most likely has a loose connection, but could also be the same problem as vossyd has.......................the comb filter circuit has a few bad capacitors in it. (It is a Vertical problem)

 

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