Magnavox projection TV problem

[Jeff Haff]

I've got a Magnavox 55" projection TV that recently stopped working.
The first hint of a problem came while watching it last Tuesday. First
the picture only took up half the vertical height and it had kind of a
fisheye look to it. Then, after a short while, it would return to
normal. Shortly after that, it lost color and was all black & white.
At various times, the screen would also just go black for a split
second before returning to normal.
I turned the TV off and, a couple hours later, I turned it back
on and everything seemed to work fine for about 3 hours. Then it
totally shut off and would not do anything. The green light on the
front came on and you could hear it power up, but there was no picture
and no sound.
I decided to take the back cover off and look around to see if I
could see anything obviously wrong. There was a lot of dust in there,
so I used a can of spray air to get it off the components. I couldn't
see anything that looked out of the ordinary to me, so I put the cover
back on. When I hit power after that, it worked fine. It continued to
work fine for about 4 days, so I thought everything was OK. Then on
Saturday I left the house and left the TV on. When I came back, the
TV was off and I was back to the power up but no sound or picture
problem again.
I took the back cover off again and I saw that one of the circuit
boards on the bottom had a small bit (about a teaspoon) of oil on it
with some black residue in it.
So that's my story. Does anybody know what kind of a situation
I've got on my hands? This TV is only 3 years old. I'm about to take
it to a repair shop, but I wanted to see if anybody had an idea of
what was wrong before I did that so I can have an idea of what kind of
repair bill I'm looking at.

Jeff Haff
jeff@itlnet.net

 

[Dan Cauley]

Sounds like you have a coolant leak. To prevent further damage, stop using
the set immidiately. Most shops give free estimates.

Dan

"Jeff Haff" <jeff@itlnet.net> wrote in message
news:45647c30.0309251045.2c738ec0@posting.google.com...

I've got a Magnavox 55" projection TV that recently stopped working.
The first hint of a problem came while watching it last Tuesday. First
the picture only took up half the vertical height and it had kind of a
fisheye look to it. Then, after a short while, it would return to
normal. Shortly after that, it lost color and was all black & white.
At various times, the screen would also just go black for a split
second before returning to normal.
I turned the TV off and, a couple hours later, I turned it back
on and everything seemed to work fine for about 3 hours. Then it
totally shut off and would not do anything. The green light on the
front came on and you could hear it power up, but there was no picture
and no sound.
I decided to take the back cover off and look around to see if I
could see anything obviously wrong. There was a lot of dust in there,
so I used a can of spray air to get it off the components. I couldn't
see anything that looked out of the ordinary to me, so I put the cover
back on. When I hit power after that, it worked fine. It continued to
work fine for about 4 days, so I thought everything was OK. Then on
Saturday I left the house and left the TV on. When I came back, the
TV was off and I was back to the power up but no sound or picture
problem again.
I took the back cover off again and I saw that one of the circuit
boards on the bottom had a small bit (about a teaspoon) of oil on it
with some black residue in it.
So that's my story. Does anybody know what kind of a situation
I've got on my hands? This TV is only 3 years old. I'm about to take
it to a repair shop, but I wanted to see if anybody had an idea of
what was wrong before I did that so I can have an idea of what kind of
repair bill I'm looking at.

Jeff Haff
jeff@itlnet.net

 

[Ol' Duffer]

"Dan Cauley" <cauley@nospam.telus.net> wrote in message
news:HrHcb.9751$AC3.338556@news2.telusplanet.net...
<snip>

Most shops give free estimates.

No. Most shops that pay well enough to keep competent techs need
to charge a nominal fee to stay in business. Be suspicious of anyone
offering a "free" estimate.

 

[Leonard Caillouet]

True, any shop that does not value its technicians time enough to ask
reasonable payment for estimates is likely not going to keep decent techs
around very long.

Leonard Caillouet

"Ol' Duffer" <dontsend@mespam.net> wrote in message
news:bl4k8a$stl$0@65.17.137.22...

"Dan Cauley" <cauley@nospam.telus.net> wrote in message
news:HrHcb.9751$AC3.338556@news2.telusplanet.net...
snip
Most shops give free estimates.

No. Most shops that pay well enough to keep competent techs need
to charge a nominal fee to stay in business. Be suspicious of anyone
offering a "free" estimate.

 

[Jeff Haff]

jeff@itlnet.net (Jeff Haff) wrote in message news:<45647c30.0309251045.2c738ec0@posting.google.com>...

I've got a Magnavox 55" projection TV that recently stopped working.

Well, it turns out that I had a CRT tube leak onto one of the main
motherboards. The repair shop says that I should call Magnavox and see
if there is any assistance available in picking up part of the cost.
That seems like a long shot at best as the TV is out of warranty. It
was purchased in July of 2000 and the CRT was only warrantied for 2
years.

This whole problem just seems to be caused by poor design. Why place
something with a liquid in it directly over a major electrical
component? Oh wait, I see now, maybe it's so they can sell replacement
components.

Anyway, if anybody has a used main circuit board for a Magnavox model
9P5511, let me know.


Jeff Haff
jeff@itlnet.net

 

[Alain.Beguin]

"Jeff Haff" a écrit le/schreef op/wrote on 6/10/2003

jeff@itlnet.net (Jeff Haff) wrote in message
news:<45647c30.0309251045.2c738ec0@posting.google.com>...
I've got a Magnavox 55" projection TV that recently stopped working.

Well, it turns out that I had a CRT tube leak onto one of the main
motherboards. The repair shop says that I should call Magnavox and see
if there is any assistance available in picking up part of the cost.
That seems like a long shot at best as the TV is out of warranty. It
was purchased in July of 2000 and the CRT was only warrantied for 2
years.

This whole problem just seems to be caused by poor design. Why place
something with a liquid in it directly over a major electrical
component? Oh wait, I see now, maybe it's so they can sell replacement
components.



Jeff Haff
jeff@itlnet.net

I'm just curious, why don't you listen to the "good" advice that the
repair shop gave you.
It is not by trying do take the Magnavox name in the dirt that you will
be helped by them...
Your repair shop is right and Magnavox will indeed pick up part of the
costs.
Philips and Magnavox are doing this in the entire world, even when the
warranty is finished.
This is called the "coulance".Only for "special" cases, like this one
is.
And also, where do you want those tubes? Usually they are close to the
mainboard.
I wander why i'm telling you this, because you don't deserve to be
helped.

Anyway, if anybody has a used main circuit board for a Magnavox model
9P5511, let me know.

Thank you in advance would be to much?

--
alain.beguin : be - 2330
name_nom_naam @ tijd . be

 

[Ol' Duffer]

In article <45647c30.0310060521.14c7f194@posting.google.com>,
jeff@itlnet.net says...
<snip>

It was purchased in July of 2000 and the CRT was only warrantied
for 2 years.

Most likely the CRT is fine, but either the coolant chamber
gasket or the expansion diaphragm has been damaged. This could
have happened during assembly, or be the result of rough handling
during transport.

This whole problem just seems to be caused by poor design. Why place
something with a liquid in it directly over a major electrical
component?

Part of the answer may be that the circuit boards have become
large to accomodate the increased complexity of HDTV readiness,
PIP, parental control, digital convergence, Dolby surround,
and so forth. The cabinet space available lends itself best
to horizontal board placement. Still it seems incredibly
shortsighted to not have considered the possibility of leakage.

Perhaps this is a risk-assessment issue, i.e. they figure that
the majority will survive the warranty, and the cost of repairing
a few failures will be less than the design of a real solution.

Anyway, if anybody has a used main circuit board for a Magnavox model
9P5511, let me know.

I think you previously indicated that it still worked some of
the time, and if so it should not be too difficult to clean up
and repair. New panels sell in the $500 range IIRC.

 

[TV Fixer1]

Saw one of these new under warranty. It had a small sliver of metal caught in
the O-ring that seals the filler plug on the coolant chamber. Replaced the
o-ring and the Small Signal board.