We have (had) a standard 20" Sony TV in our motor home, mounted on the
wall.

It has been fine for a number of years but now I notice that the plastic
around the VESA mount has broken in one corner and the split is spreading.

In retrospect it might have been sensible to keep the TV off the wall
except when in use, to avoid the stress due to bumps and lumps on the road
and camp site. However......

My options seem to be:

(1) Remove the back, repair and reinforce.

(2) Replace with new.

In either case the same problem will still be there - if it is mounted on
the wall there is more likely stress than if it is in the home on a lounge
wall.

So even a new screen might need reinforcing.

[I have noted that I have PC monitors of the desired size with VESA mounts
on the back, so a DVB-T2 STB and a computer monitor might be more
practical than a new TV.]

On the other hand the original TV is a heavy old bugger and our newest TV
(Samsung) seems a lot lighter.

Anyhoo....has anyone had need to reinforce the back of a TV or monitor? I
assume that this would have to be done from the inside, but perhaps if
using something like fibreglass matting it might be possible from the
outside? The big problem is likely to be not covering up the ventilation
holes; this doesn't seem to be a problem with PC monitors, only the TV. I
assume removing the decoder bits and having them in a separate STB makes
the screen a lot less power hungry and much cooler.

Cheers


Dave R

--
Windows 8.1 on PCSpecialist box

On 29/08/2016 14:45, David wrote:

(1) Remove the back, repair and reinforce.


The back itself doesn't usually support the weight, take the back off
and look for a pair of metal brackets or a plate that the vesa mount
bolts through to.

Probably a good idea to check the integrity of these first

On Mon, 29 Aug 2016 15:51:09 +0100, Lee wrote:

On 29/08/2016 14:45, David wrote:

(1) Remove the back, repair and reinforce.


The back itself doesn't usually support the weight, take the back off
and look for a pair of metal brackets or a plate that the vesa mount
bolts through to.

Probably a good idea to check the integrity of these first

I can see the metal plate flexing out with the broken bit of the back; I
assume that it is bonded to the plastic of the back.

The only other option I can visualise would be for there to be a metal
chassis for the whole TV which I don't thing is likely these days.


Cheers


Dave R


--
Windows 8.1 on PCSpecialist box

Can't you perhaps mount it in a frame so tha tthe heacy screen is
suppoerted all around - at least when driving - perhaps a parking location.
Not surprised it is breaking.

On 29/08/2016 17:13, David wrote:
On Mon, 29 Aug 2016 15:51:09 +0100, Lee wrote:

On 29/08/2016 14:45, David wrote:

(1) Remove the back, repair and reinforce.


The back itself doesn't usually support the weight, take the back off
and look for a pair of metal brackets or a plate that the vesa mount
bolts through to.

Probably a good idea to check the integrity of these first

I can see the metal plate flexing out with the broken bit of the back; I
assume that it is bonded to the plastic of the back.

The only other option I can visualise would be for there to be a metal
chassis for the whole TV which I don't thing is likely these days.


All the LCDs I've worked on have had a metal chassis of some form,
albeit some have not been much more than just the thin metal back of the
screen assembly
If the plate hasn't snapped away from something then, as you say it's
likely flexing because it's taking vibrational loads it wasn't designed to.
Stiffening the back might help I guess, though it might then crack
somewhere else...

Lee

On 29/08/2016 17:28, DerbyBorn wrote:



Can't you perhaps mount it in a frame so tha tthe heacy screen is
suppoerted all around - at least when driving - perhaps a parking location.
Not surprised it is breaking.


Personally I'd want to mount it as rigidly as possible so that it moves
with the mass of the vehicle and not independently.
Maybe additional plates in the corners, if it can be done safely?

David wrote:

I can see the metal plate flexing out with the broken bit of the back; I
assume that it is bonded to the plastic of the back.

The only other option I can visualise would be for there to be a metal
chassis for the whole TV which I don't thing is likely these days.

Maybe a brass bush pressed into a supposedly solid part of the plastic
case and the VESA screws go through into it? If it's been bouncing down
the road they could have worked loose - epoxy?

On 29/08/2016 19:41, Andy Burns wrote:
David wrote:

I can see the metal plate flexing out with the broken bit of the back; I
assume that it is bonded to the plastic of the back.

The only other option I can visualise would be for there to be a metal
chassis for the whole TV which I don't thing is likely these days.

Maybe a brass bush pressed into a supposedly solid part of the plastic
case and the VESA screws go through into it? If it's been bouncing down
the road they could have worked loose - epoxy?

I had thought when I read the OP of offering an additional option "(3)
sand the back lightly and apply car body filler - avoiding vents" but
thought I'd be lowering the tone of the place

--
Robin
reply-to address is (intended to be) valid

I'd have thought even with newer flat screens the main outlay on power
would be the light.
Some of the early decoder chips were rather power hungry, but then to drive
a screen those chips are as well.
I'm surprised if the back made of plastic is the only thing holding it up
though. ;having a poke at one here suggests to me that the mounting holes
are part of some kind of internal structure, just protruding through the
much thinner case parts. Obviously designs differ.

I think maybe you are being a bit optimistic to expect ordinary wall
mounting to support something subjected to such treatment but I'd have
thought the inside of the caravan or motor home might have been the
failure point not the mounting on the tv.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"David" wrote in message
...
We have (had) a standard 20" Sony TV in our motor home, mounted on the
wall.

It has been fine for a number of years but now I notice that the plastic
around the VESA mount has broken in one corner and the split is spreading.

In retrospect it might have been sensible to keep the TV off the wall
except when in use, to avoid the stress due to bumps and lumps on the road
and camp site. However......

My options seem to be:

(1) Remove the back, repair and reinforce.

(2) Replace with new.

In either case the same problem will still be there - if it is mounted on
the wall there is more likely stress than if it is in the home on a lounge
wall.

So even a new screen might need reinforcing.

[I have noted that I have PC monitors of the desired size with VESA mounts
on the back, so a DVB-T2 STB and a computer monitor might be more
practical than a new TV.]

On the other hand the original TV is a heavy old bugger and our newest TV
(Samsung) seems a lot lighter.

Anyhoo....has anyone had need to reinforce the back of a TV or monitor? I
assume that this would have to be done from the inside, but perhaps if
using something like fibreglass matting it might be possible from the
outside? The big problem is likely to be not covering up the ventilation
holes; this doesn't seem to be a problem with PC monitors, only the TV. I
assume removing the decoder bits and having them in a separate STB makes
the screen a lot less power hungry and much cooler.

Cheers


Dave R

--
Windows 8.1 on PCSpecialist box

On 30/08/16 07:53, Brian Gaff wrote:
I'd have thought even with newer flat screens the main outlay on power
would be the light.
Some of the early decoder chips were rather power hungry, but then to drive
a screen those chips are as well.
I'm surprised if the back made of plastic is the only thing holding it up
though. ;having a poke at one here suggests to me that the mounting holes
are part of some kind of internal structure, just protruding through the
much thinner case parts. Obviously designs differ.

I think maybe you are being a bit optimistic to expect ordinary wall
mounting to support something subjected to such treatment but I'd have
thought the inside of the caravan or motor home might have been the
failure point not the mounting on the tv.
Brian


+1

I think the OP needs to have some padded clips that restrain and support
the TV by its outer frame whilst on the move.

In article ,
Lee writes:
On 29/08/2016 17:28, DerbyBorn wrote:



Can't you perhaps mount it in a frame so tha tthe heacy screen is
suppoerted all around - at least when driving - perhaps a parking location.
Not surprised it is breaking.


Personally I'd want to mount it as rigidly as possible so that it moves
with the mass of the vehicle and not independently.

I was thinking the opposite - a bracket which can absorb much of
the vibration would prevent it reaching and damaging the TV.

I would not be surprised if the vibration eventually caused internal
damage to circuitry too, be it connectors that dislodge, or heavier
components that break free, or large circuit boards which flex and
crack (although circuit boards have become tiny in newer sets nowadays).

Ironically, the broken case has become a point to absorb the energy,
but it's not going to do it safely without failing, whereas a properly
designed vibration mount would.

I'm now imagining a mount consisting of a couple of bungie straps
stretched tighly between the mid-wall and the ceiling (out a bit from
the wall), with the TV attached to the centre of them. Ideally, you
want some damping too, but even without dampers, that would reduce the
extremes of the G-forces reaching the TV. Washing machine drum suspension
springs from the ceiling and drum shock absorbers below to the wall
would be another way, although those shock absorbers are probably too
tough unless you attach the concrete drum weight to the back of the
screen too, and that might significantly change the drive handling!

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On 30/08/2016 11:12, Andrew Gabriel wrote:

I was thinking the opposite - a bracket which can absorb much of
the vibration would prevent it reaching and damaging the TV.

For vehicular use there are arguments on both sides, except where you
can free-float something...


I'm now imagining a mount consisting of a couple of bungie straps
stretched tighly between the mid-wall and the ceiling (out a bit from
the wall), with the TV attached to the centre of them.

Now clearly that would be the best solution of all, if not exactly
pretty to look at

Lee

Lee wrote:
On 30/08/2016 11:12, Andrew Gabriel wrote:

I was thinking the opposite - a bracket which can absorb much of
the vibration would prevent it reaching and damaging the TV.

For vehicular use there are arguments on both sides, except where you
can free-float something...


I'm now imagining a mount consisting of a couple of bungie straps
stretched tighly between the mid-wall and the ceiling (out a bit from
the wall), with the TV attached to the centre of them.

Now clearly that would be the best solution of all, if not exactly
pretty to look at

Lee



Interesting that all vehicle mounted displays IME, are solid
mounted. My own experience with a soft flexible mounting is poor for a
rear view camera. I need to improve the rigidity.

On Tue, 30 Aug 2016 10:12:44 +0000, Andrew Gabriel wrote:

In article ,
Lee writes:
On 29/08/2016 17:28, DerbyBorn wrote:



Can't you perhaps mount it in a frame so tha tthe heacy screen is
suppoerted all around - at least when driving - perhaps a parking
location.
Not surprised it is breaking.


Personally I'd want to mount it as rigidly as possible so that it moves
with the mass of the vehicle and not independently.

I was thinking the opposite - a bracket which can absorb much of the
vibration would prevent it reaching and damaging the TV.

I would not be surprised if the vibration eventually caused internal
damage to circuitry too, be it connectors that dislodge, or heavier
components that break free, or large circuit boards which flex and crack
(although circuit boards have become tiny in newer sets nowadays).

Ironically, the broken case has become a point to absorb the energy,
but it's not going to do it safely without failing, whereas a properly
designed vibration mount would.

I'm now imagining a mount consisting of a couple of bungie straps
stretched tighly between the mid-wall and the ceiling (out a bit from
the wall), with the TV attached to the centre of them. Ideally, you want
some damping too, but even without dampers, that would reduce the
extremes of the G-forces reaching the TV. Washing machine drum
suspension springs from the ceiling and drum shock absorbers below to
the wall would be another way, although those shock absorbers are
probably too tough unless you attach the concrete drum weight to the
back of the screen too, and that might significantly change the drive
handling!

At that level of engineering, the alternative "remember to remove the TV
from the bracket before moving off" probably hits the sweet spot.

Lay it down on the seat cushion during travel and re-mount when parked up.

I think I just need enough remedial work to allow it to be mounted on the
wall when not moving.

Put the whole issue down to laziness and "well, it seems all right so far".

Or upgrade to a thinner, lighter TV or monitor with potentially more
screen area. The latest Samsung seems amazingly light.

Cheers


Dave R



--
Windows 8.1 on PCSpecialist box