Forums

LCD screen -- water spots

Started by mkr5000 January 20, 2014
Restored a TV that had set outside and it must have received some rainwater=
 or snow.

I googled the image of what the damage looks like and it's like "clouds" th=
at are here and there in the display background. Ran into some info that sa=
id to put a small heater in front of the bad areas (within reason obviously=
) and that will help. Lo and behold after a few days it did clear up some o=
f the areas I've directed the heat toward, but some others are VERY stubbor=
n.

Has anyone encountered this problem? If I just keep the TV in a dry environ=
ment will these spots eventually go away? Or do you think that unless they =
go away soon, that the damage may be permanent?

I don't know enough about the "sandwich" that is an LCD screen -- maybe som=
eone does. Also, disassembling the display looks like something I don't wan=
t to do or may be impossible from the looks of it. Thanks.
On a sunny day (Mon, 20 Jan 2014 06:36:14 -0800 (PST)) it happened mkr5000
<mikerbgr@gmail.com> wrote in
<89dd1833-b95f-43f7-a899-e40c9a0fd7d1@googlegroups.com>:

>Restored a TV that had set outside and it must have received some rainwater= > or snow. > >I googled the image of what the damage looks like and it's like "clouds" th= >at are here and there in the display background. Ran into some info that sa= >id to put a small heater in front of the bad areas (within reason obviously= >) and that will help. Lo and behold after a few days it did clear up some o= >f the areas I've directed the heat toward, but some others are VERY stubbor= >n. > >Has anyone encountered this problem? If I just keep the TV in a dry environ= >ment will these spots eventually go away? Or do you think that unless they = >go away soon, that the damage may be permanent? > >I don't know enough about the "sandwich" that is an LCD screen -- maybe som= >eone does. Also, disassembling the display looks like something I don't wan= >t to do or may be impossible from the looks of it. Thanks.
I once had a LCd monitor to Samsung for repair, when it came back it had a black spot on thw screen. Closer look revealed it was a very small insect, not on the outside, but behind the glass. Tapping the galss did not help... it looked glued to the screen. Just the size of a pixel or 2, after some weeks it disappeared, probably fell of, or ended its summer sleep.... Probably does not help you, but I would take the thing apart ot see if it is on the backlight or on the LCD itself. Nothing to lose....
On 20/01/2014 14:36, mkr5000 wrote:
> Restored a TV that had set outside and it must have received some rainwater or snow. > > I googled the image of what the damage looks like and it's like "clouds" that are here and there in the display background. Ran into some info that said to put a small heater in front of the bad areas (within reason obviously) and that will help. Lo and behold after a few days it did clear up some of the areas I've directed the heat toward, but some others are VERY stubborn. > > Has anyone encountered this problem? If I just keep the TV in a dry environment will these spots eventually go away? Or do you think that unless they go away soon, that the damage may be permanent?
Hard to say without seeing it first hand. If it is water then it will move around whereas if it is a salt residue from dirty water having entered the display then it will sit there until cleaned off.
> I don't know enough about the "sandwich" that is an LCD screen -- maybe someone does. Also, disassembling the display looks like something I don't want to do or may be impossible from the looks of it. Thanks. >
Putting it inside a largish airtight tin or fish tank with some rice as dessicant might help remove any traces of water trapped in between the thin films. Problem is that unless you have somewhere else for the water to go you will end up chasing it around with heat. You could just wait and see if it recovers when kept in a warm dry office environment. -- Regards, Martin Brown
I read about that rice trick -- actually I moved the heater (set on low, ab=
out 8" from screen) to another area and I've removed about 70% of the damag=
e so far. =20

I learned this --
direct the heater to the edges of the "cloud" and work your way in, rather =
than pointing it in the middle.

Believe it or not, I think the heat is going to do the trick.









On Monday, January 20, 2014 12:13:32 PM UTC-5, Martin Brown wrote:
> On 20/01/2014 14:36, mkr5000 wrote: >=20 > > Restored a TV that had set outside and it must have received some rainw=
ater or snow.
>=20 > > >=20 > > I googled the image of what the damage looks like and it's like "clouds=
" that are here and there in the display background. Ran into some info tha= t said to put a small heater in front of the bad areas (within reason obvio= usly) and that will help. Lo and behold after a few days it did clear up so= me of the areas I've directed the heat toward, but some others are VERY stu= bborn.
>=20 > > >=20 > > Has anyone encountered this problem? If I just keep the TV in a dry env=
ironment will these spots eventually go away? Or do you think that unless t= hey go away soon, that the damage may be permanent?
>=20 >=20 >=20 > Hard to say without seeing it first hand. If it is water then it will=20 >=20 > move around whereas if it is a salt residue from dirty water having=20 >=20 > entered the display then it will sit there until cleaned off. >=20 >=20 >=20 > > I don't know enough about the "sandwich" that is an LCD screen -- maybe=
someone does. Also, disassembling the display looks like something I don't= want to do or may be impossible from the looks of it. Thanks.
>=20 > > >=20 > Putting it inside a largish airtight tin or fish tank with some rice as=
=20
>=20 > dessicant might help remove any traces of water trapped in between the=20 >=20 > thin films. Problem is that unless you have somewhere else for the water=
=20
>=20 > to go you will end up chasing it around with heat. You could just wait=20 >=20 > and see if it recovers when kept in a warm dry office environment. >=20 >=20 >=20 > --=20 >=20 > Regards, >=20 > Martin Brown
On Mon, 20 Jan 2014 06:36:14 -0800 (PST), mkr5000 <mikerbgr@gmail.com>
wrote:

>Restored a TV that had set outside and it must have received some rainwater or snow. > >I googled the image of what the damage looks like and it's like "clouds" that are here and there in the display background. Ran into some info that said to put a small heater in front of the bad areas (within reason obviously) and that will help. Lo and behold after a few days it did clear up some of the areas I've directed the heat toward, but some others are VERY stubborn. > >Has anyone encountered this problem? If I just keep the TV in a dry environment will these spots eventually go away? Or do you think that unless they go away soon, that the damage may be permanent? > >I don't know enough about the "sandwich" that is an LCD screen -- maybe someone does. Also, disassembling the display looks like something I don't want to do or may be impossible from the looks of it. Thanks.
Do you have access to a sufficiently large vacuum chamber to hold the TV? Failing that, maybe buy a box of dessicant from your friendly neighborhood craft store and stick it in a closed garbage bag in a warm space for a week or two.
That's a GREAT idea.

I think you can get those silica packs online.

So far the heat is doing pretty nicely but I bet that would do it.=20





On Monday, January 20, 2014 2:41:53 PM UTC-5, Spehro Pefhany wrote:
> On Mon, 20 Jan 2014 06:36:14 -0800 (PST), mkr5000 <mikerbgr@gmail.com> >=20 > wrote: >=20 >=20 >=20 > >Restored a TV that had set outside and it must have received some rainwa=
ter or snow.
>=20 > > >=20 > >I googled the image of what the damage looks like and it's like "clouds"=
that are here and there in the display background. Ran into some info that= said to put a small heater in front of the bad areas (within reason obviou= sly) and that will help. Lo and behold after a few days it did clear up som= e of the areas I've directed the heat toward, but some others are VERY stub= born.
>=20 > > >=20 > >Has anyone encountered this problem? If I just keep the TV in a dry envi=
ronment will these spots eventually go away? Or do you think that unless th= ey go away soon, that the damage may be permanent?
>=20 > > >=20 > >I don't know enough about the "sandwich" that is an LCD screen -- maybe =
someone does. Also, disassembling the display looks like something I don't = want to do or may be impossible from the looks of it. Thanks.
>=20 >=20 >=20 > Do you have access to a sufficiently large vacuum chamber to hold the >=20 > TV?=20 >=20 >=20 >=20 > Failing that, maybe buy a box of dessicant from your friendly >=20 > neighborhood craft store and stick it in a closed garbage bag in a >=20 > warm space for a week or two.
On Mon, 20 Jan 2014 14:41:53 -0500, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

>On Mon, 20 Jan 2014 06:36:14 -0800 (PST), mkr5000 <mikerbgr@gmail.com> >wrote: > >>Restored a TV that had set outside and it must have received some rainwater or snow. >> >>I googled the image of what the damage looks like and it's like "clouds" that are here and there in the display background. Ran into some info that said to put a small heater in front of the bad areas (within reason obviously) and that will help. Lo and behold after a few days it did clear up some of the areas I've directed the heat toward, but some others are VERY stubborn. >> >>Has anyone encountered this problem? If I just keep the TV in a dry environment will these spots eventually go away? Or do you think that unless they go away soon, that the damage may be permanent? >> >>I don't know enough about the "sandwich" that is an LCD screen -- maybe someone does. Also, disassembling the display looks like something I don't want to do or may be impossible from the looks of it. Thanks. > >Do you have access to a sufficiently large vacuum chamber to hold the >TV? > >Failing that, maybe buy a box of dessicant from your friendly >neighborhood craft store and stick it in a closed garbage bag in a >warm space for a week or two. > >
Rice is supposed to be a good substitute for removing moisture. Cheers
On Tue, 21 Jan 2014 08:13:09 -0500, the renowned Martin Riddle
<martin_rid@verizon.net> wrote:

>On Mon, 20 Jan 2014 14:41:53 -0500, Spehro Pefhany ><speffSNIP@interlogDOTyou.knowwhat> wrote: > >>On Mon, 20 Jan 2014 06:36:14 -0800 (PST), mkr5000 <mikerbgr@gmail.com> >>wrote: >> >>>Restored a TV that had set outside and it must have received some rainwater or snow. >>> >>>I googled the image of what the damage looks like and it's like "clouds" that are here and there in the display background. Ran into some info that said to put a small heater in front of the bad areas (within reason obviously) and that will help. Lo and behold after a few days it did clear up some of the areas I've directed the heat toward, but some others are VERY stubborn. >>> >>>Has anyone encountered this problem? If I just keep the TV in a dry environment will these spots eventually go away? Or do you think that unless they go away soon, that the damage may be permanent? >>> >>>I don't know enough about the "sandwich" that is an LCD screen -- maybe someone does. Also, disassembling the display looks like something I don't want to do or may be impossible from the looks of it. Thanks. >> >>Do you have access to a sufficiently large vacuum chamber to hold the >>TV? >> >>Failing that, maybe buy a box of dessicant from your friendly >>neighborhood craft store and stick it in a closed garbage bag in a >>warm space for a week or two. >> >> > >Rice is supposed to be a good substitute for removing moisture. > >Cheers
Basmati might be good because the guy who will eventually fix your electronics would like it. Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com