This type of fault can be difficult to find. It is probably a cold solder
(dry joint), or a defective connector, or a component that is mechanicaly
defective. These types of faults are difficult to find, even for the very
experienced.

The tech would prop the chasis up on its end, and carefully excersize the
various areas of the circuit boards to provoke the problem, in order to zero
in on it. The places to start looking are in the scan generator, power
supply, and scan amplifers. Start with areas where there are components that
run very hot.

When working on the TV set, take care for very serious safety issues. To
find this type of intermittant, the set will have to be operating to provoke
the fault. You may be best off to send it out for proper and safe service,
done by an experienced tech.



--

Jerry G.
=====



"Nigel Heather" wrote in message
...
I have a JVC 28" Television - its over 10 years old but still gives a good
picture most of the time.

My problem is that on an irregular basis the TV will appear to go into
standby (loss of picture and sound) and the power LED goes from bright to
dim.

A well aimed hard bash on the side will get it working again, sometimes
for
a month, sometimes for a week or sometimes for a few minutes.

When it's working everyting is perfect so I'm assuming I have a dry joint
or
loose connection rather than a faulty component.

Trouble is, when I take the back off it always works and I have been
unable
to spot the problem area.

I'm good with electronics but don't know TVs that well. From my
description
is there any particular area I should be looking (to narrow my search) or
could the fault lie anywhere.

Cheers,

Nigel