Hitachi Big Screen picture shake

Hi,

This rear projection unit is about 1 year old. Sorry don't have model handy with me.

Picture was shrinking a couple of inches on each side, so Sears service was called, as there's a svc contract with them.

One guy diagnosed a problem and ordered a couple boards, one was the Main Power Bd, the other sounded like Sych bd. Another guy replaced the boards.

Picture was fine after the replacement, but now the bottom part of the picture shakes on all channels. The shaking is intermittent. May go on for

1/2 hr then stop.

Any hints, what may have gone wrong? Clearly there's a new problem, but when the svc guy comes, it may not be shaking.

Regards,

RichK

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RichK
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Art

Done that. Seems to be heat related, as it happens when set warms up.

The parts and service for the visit were over $1000. Lucky there is an extended warranty.

RichK

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RichK

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Papa_J

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