Digest for sci.electronics.repair@googlegroups.com - 5 updates in 2 topics

"ohg...@gmail.com" <ohger1s@gmail.com>: Jul 18 11:56AM -0700

> - cracked display - he didn't elaborate on exactly how it happened
> but it was in the re-assembly ..
> John T.
 
He probably didn't know what happened. Some TVs have a mm or more clearance on each of the 8 corner guides and the display settles in nicely between the plastic corner guides. Some TVs have less than a mm and it's easy to get the edge of one corner of the display sitting on top of the plastic guide - and it's not easy to see. Once the outer mask goes in it just nips the display and it cracks like a windshield. I always triple check the corners with my fingers to ensure the display is sitting below grade. Last week I had a Samsung where I could not get all four corners to sit down below grade at the same time - BTW, use a suction cup to gently move the display around. What happened was the metal pan chassis was racked a bit into a very slight parallelogram figure instead of a rectangle. I removed the display, picked up the chassis, flexed it a few times, and put it back down on the bench. This time the display went in. If it didn't, my next plan was to relieve some of the plastic guide with a Dremel to provide more clearance which I've done a dozen times or more on some TVs.
hubops@ccanoemail.com: Jul 18 05:06PM -0400

On Tue, 18 Jul 2023 11:56:37 -0700 (PDT), "ohg...@gmail.com"
>> John T.
 
>He probably didn't know what happened. Some TVs have a mm or more clearance on each of the 8 corner guides and the display settles in nicely between the plastic corner guides. Some TVs have less than a mm and it's easy to get the edge of one corner of the display sitting on top of the plastic guide - and it's not easy to see. Once the outer mask goes in it just nips the display and it cracks like a windshield. I always triple check the corners with my fingers to ensure the display is sitting below grade. Last week I had a Samsung where I could not get all four corners to sit down below grade at the same time - BTW, use a suction cup to gently move the display around. What happened was the metal pan chassis was racked a bit into a very slight parallelogram figure instead of a rectangle. I removed the display, picked up the chassis, flexed it a few times, and put it back down on the bench. This time the display went in. If it didn't, my next plan was to relieve some of the
>plastic guide with a Dremel to provide more clearance which I've done a dozen times or more on some TVs.
 
I stumbled on this guy's video - and used his procedure -
which avoids the over-handling of the display -
he leaves the display on the table and lifts away the TV !
- have a watch and critique - I don't see a downside.
 
https://www.youtube.com/watch?v=WHMJCxDfm0k
 
His TV has 4 raised bolt-mounts that allowed him to simply
flip the TV over, once the back was removed, and the circuit boards
were not touching the table - my TV only had 2 of those - but
luckily - my wall-mount brackets provided 2 bolts that I used
for the other 2 points - as elevators ..
 
My dis-assembly went OK - a couple of sneaky screws holding
the back cover on ; and a little extra persuasion
was required on the corners - when un-clipping the TV body
from the display frame.
I had 2 lenses that had fallen off and found 2 more
that came off with just a slight wiggle.
I'm waiting for the silicone to set and then re-assembly.
John T.
"ohg...@gmail.com" <ohger1s@gmail.com>: Jul 19 06:55AM -0700

> that came off with just a slight wiggle.
> I'm waiting for the silicone to set and then re-assembly.
> John T.
 
Some TVs (RCA Proscan) actually *require* the back pan to be lifted off the screen because the screen is bonded to the outer frame.
 
This guy got away with it this time (I assume, didn't watch the whole thing) but what can happen is that one corner of the screen can still be moved out of position from the frame guides because it's not bonded to it. If it slips a mm out of position, the display will crack when the pan is lowered into the frame. If you do it this way, what I would do first is to tape the screen to the outer mask before any disassembly with a good quality masking tape to try to avoid screen movement as much as possible.
 
His method does eliminate some screen stress (which isn't a problem if you're careful), but it's not worth the tradeoff to me because I can't see if the display is still nestled down between the plastic guides.
 
Hopefully, your reassembly will go well.
hubops@ccanoemail.com: Jul 19 10:39AM -0400

On Wed, 19 Jul 2023 06:55:57 -0700 (PDT), "ohg...@gmail.com"
 
>This guy got away with it this time (I assume, didn't watch the whole thing) but what can happen is that one corner of the screen can still be moved out of position from the frame guides because it's not bonded to it. If it slips a mm out of position, the display will crack when the pan is lowered into the frame. If you do it this way, what I would do first is to tape the screen to the outer mask before any disassembly with a good quality masking tape to try to avoid screen movement as much as possible.
 
>His method does eliminate some screen stress (which isn't a problem if you're careful), but it's not worth the tradeoff to me because I can't see if the display is still nestled down between the plastic guides.
 
>Hopefully, your reassembly will go well.
 
 
Nope - cracked screen .. :-(
I think it happened just as you said - slight mis-alignment when
first re-installing the TV onto the screen + screen frame ...
I had to remove it and check things and re-installl .. but I'm
pretty sure that the damage was done.
Live & learn.
Thanks for your advice just the same.
John T.
Mark Geisert <mark.a.geisert@gmail.com>: Jul 18 09:36PM -0700

On Tuesday, July 18, 2023 at 8:58:16 AM UTC-7, Falafel Balls wrote:
> >> fifty to a hundred bucks?
 
> > I use these. https://www.amazon.com/gp/product/B0B75T6CTH
> I think the op wanted something that didn't send the video to a 3rd party.
 
If you read Oscar's post again, you'll see he's talking about needing the online service to enable the features; the video is not stored online but on an SD card in the camera. I use a Bosma doorbell cam with a similar setup. Was nice to check the house front in CA remotely from Europe. Event-driven or live. Bosma has other cameras that might be better for OP's use case.
 
..mark
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