LG Flatron L1950S - advertised as broken but...

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Th3_uN1Qu3
    Believe in
    • Jul 2010
    • 6031
    • Romania
    #1

    LG Flatron L1950S - advertised as broken but...

    Here we go again, i seem to have something with 19" screens. Picked this one up for $38 (for anyone that has not read my older threads, the economy here is quite different from, um, everywhere else, cheapest 19" is currently $123 in stores, i can sell this one for at least double what i paid for it). I was quite sure it's yet another case of Samxon GF.

    I noticed that the frame had snapped out at the bottom. I was almost certain someone's been in there, but the other sides of the frame (apart from one cracked corner) showed no signs of intervention. So i bought it.

    As soon as i got it home and took the frame out, the button board cable was dangling out. I was like "oh crap". But as i flipped the frame around and took the button board out, i saw that the connector was still intact. I opened up the power supply and took a good look around, nothing wrong. Samxon GF indeed but all good.

    So i hooked up the button board and plugged it in. Nothing. I push the power button. Tada! Green light and "Check Signal Cable" comes up. Lucky for me, someone had turned it off before the little frame accident. It just couldn't be turned back on!

    Pics coming tomorrow when i get it wired up, the seller had a PC to sell today so he needed the VGA cable, but he asked me to drop by tomorrow and he'll give me that as well.
    Originally posted by PeteS in CA
    Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
    A working TV? How boring!
    Tags: None
    • smason
      Badcaps Legend
      • Feb 2010
      • 1652
      • Canada
      #2
      Re: LG Flatron L1950S - advertised as broken but...

      Cool.
      I'd recap it anyway.
      36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

        Comment

        • Th3_uN1Qu3
          Believe in
          • Jul 2010
          • 6031
          • Romania
          #3
          Re: LG Flatron L1950S - advertised as broken but...

          Originally posted by smason
          I'd recap it anyway.
          Same thoughts here, i probably will.
          Originally posted by PeteS in CA
          Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
          A working TV? How boring!

            Comment

            • mockingbird
              Badcaps Legend
              • Dec 2008
              • 5484
              • -
              #4
              Re: LG Flatron L1950S - advertised as broken but...

              Those PSUs on the LGs are a thing of beauty, no? (And they run very cool too!)

              Replace the GFs. Replace also the primary. They will all fail eventually.

              You mentioned that you like "dim" screens. I use an LG L1710S and it's pleasantly dim, why not keep this one for yourself then?

                Comment

                • Th3_uN1Qu3
                  Believe in
                  • Jul 2010
                  • 6031
                  • Romania
                  #5
                  Re: LG Flatron L1950S - advertised as broken but...

                  Originally posted by mockingbird
                  You mentioned that you like "dim" screens. I use an LG L1710S and it's pleasantly dim, why not keep this one for yourself then?
                  Well, this one's quite wonky. First of all, when it's plugged in it displays a nice Flatron logo... but the menus are identical to Samsung ones. Second, it has NO backlight dimming whatsoever. Both brightness and contrast controls drive the panel. Same goes for the "lightview" thing, it only adjusts the colors on the panel. The inverter transformers on this thing are tiny, maybe that's why it doesn't support dimming. I don't think it's faulty, it just doesn't dim. I just googled it and people report the same.

                  Oh yeah and it has a couple CapXons too... One of them is precisely in the position where i've seen failed Samxon GF before. And it's good.

                  And my 19" Nokia CRT goes dimmer than even i will ever need, plus it has more pixels than a 19" LCD.
                  Originally posted by PeteS in CA
                  Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                  A working TV? How boring!

                    Comment

                    • mockingbird
                      Badcaps Legend
                      • Dec 2008
                      • 5484
                      • -
                      #6
                      Re: LG Flatron L1950S - advertised as broken but...

                      Was the PSU an LG or was it contracted? (If it's LG you see an LG logo silkscreened on the PCB).

                        Comment

                        • Th3_uN1Qu3
                          Believe in
                          • Jul 2010
                          • 6031
                          • Romania
                          #7
                          Re: LG Flatron L1950S - advertised as broken but...

                          Well i just put it back together. I'll take a look in a couple days. The brightness is tolerable with the lightview set to "night text", but it's way, way too blue in this mode. And it really really really really really looks like a Samsung.
                          Last edited by Th3_uN1Qu3; 02-16-2011, 02:25 PM.
                          Originally posted by PeteS in CA
                          Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                          A working TV? How boring!

                            Comment

                            • Scenic
                              o.O
                              • Sep 2007
                              • 2642
                              • Germany
                              #8
                              Re: LG Flatron L1950S - advertised as broken but...

                              my L1952HQ is unbearable unless i turn the "Flatron Engine" crap off..
                              if it's on, it automatically adjusts brightness, contrast and color depending on what's displayed... PITA to look at..
                              plus you can't set stuff manually as long as it's on -.-!

                              Kinda interesting thing is that the menu and especially the "no signal" message kinda have a Windows XP style to them..

                              the no-signal screen looks like a miniature version of the welcome screen of XP

                              edit: PSU in mine is a LIEN CHANG (?) (*click*)

                              and this is what i mean by the XP style no signal message box:
                              Last edited by Scenic; 02-16-2011, 02:45 PM.

                                Comment

                                • kaboom
                                  "Oh, Grouchy!"
                                  • Jan 2011
                                  • 2507
                                  • USA
                                  #9
                                  Re: LG Flatron L1950S - advertised as broken but...

                                  So bad, it announces itself...

                                  Resolder the inverter transformers, lamp coupling caps, all those jumpers, and the two DIP FETs.


                                  On a 17" HP, I resoldered the whole board. This sat in my closet for a few years, and worked for a few hours after I took it out. Then intermittent brightness pulsation, sometimes the top backlight was a different color/brightness from the bottom. After 20 minutes, it got so bad, it would only work for 10 seconds with each power cycle. Not the caps. This unit had jumpers for *everything,* and all over the inverter, cracks in the lame excuse for solder. When the tuning caps across the primaries of the inverter tx's started to lose connection, the inverter PWM must've sensed the excessive voltage. It would've eventually ate the inverter transistors, a-la EFP172.

                                  Did it work after resoldering? You bet.

                                  Hey Unique, the crap is on with Crap-Xon
                                  -Paul
                                  Attached Files
                                  Last edited by kaboom; 02-16-2011, 11:06 PM.
                                  "pokemon go... to hell!"

                                  EOL it...
                                  Originally posted by shango066
                                  All style and no substance.
                                  Originally posted by smashstuff30
                                  guilty,guilty,guilty,guilty!
                                  guilty of being cheap-made!

                                    Comment

                                    • Scenic
                                      o.O
                                      • Sep 2007
                                      • 2642
                                      • Germany
                                      #10
                                      Re: LG Flatron L1950S - advertised as broken but...

                                      the caps in mine were all Samxon GF.. none of them bad, but i replaced them anyways.
                                      also resoldered all the critical parts.. (as i always do)
                                      friend of mine bought it when his 19" CRT died.. still working fine almost a year later

                                        Comment

                                        • Th3_uN1Qu3
                                          Believe in
                                          • Jul 2010
                                          • 6031
                                          • Romania
                                          #11
                                          Re: LG Flatron L1950S - advertised as broken but...

                                          @ kaboom: Is that really a HP PSU? Coz it sure looks like the one i have in my LG. Complete with similar markings on the transformer, dozens of jumpers and all.

                                          @ Scenic: I have a similar check cable screen on mine. I've also seen this type of menu and info screen on Samsungs. I guess it's the same HongKongFlyApart company - (c) Toasty - who makes them.
                                          Originally posted by PeteS in CA
                                          Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                                          A working TV? How boring!

                                            Comment

                                            • Th3_uN1Qu3
                                              Believe in
                                              • Jul 2010
                                              • 6031
                                              • Romania
                                              #12
                                              Re: LG Flatron L1950S - advertised as broken but...

                                              It's leaving tomorrow for just a little under double what i paid. Next i'll try to pick up something else not a 19" all over again.
                                              Originally posted by PeteS in CA
                                              Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                                              A working TV? How boring!

                                                Comment

                                                • kaboom
                                                  "Oh, Grouchy!"
                                                  • Jan 2011
                                                  • 2507
                                                  • USA
                                                  #13
                                                  Re: LG Flatron L1950S - advertised as broken but...

                                                  That *is* your LG. I just put a red box around 'PB Free Solder.'
                                                  "pokemon go... to hell!"

                                                  EOL it...
                                                  Originally posted by shango066
                                                  All style and no substance.
                                                  Originally posted by smashstuff30
                                                  guilty,guilty,guilty,guilty!
                                                  guilty of being cheap-made!

                                                    Comment

                                                    • Th3_uN1Qu3
                                                      Believe in
                                                      • Jul 2010
                                                      • 6031
                                                      • Romania
                                                      #14
                                                      Re: LG Flatron L1950S - advertised as broken but...

                                                      Just read the above posts again - it's Scenic's LG. I didn't remember posting pics of mine - and indeed i did not.
                                                      Originally posted by PeteS in CA
                                                      Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                                                      A working TV? How boring!

                                                        Comment

                                                        • Th3_uN1Qu3
                                                          Believe in
                                                          • Jul 2010
                                                          • 6031
                                                          • Romania
                                                          #15
                                                          Re: LG Flatron L1950S - advertised as broken but...

                                                          Well, after messing around with it for a little it turns out that it does actually have an useful control - the "white balance" one. Display full white screen, select that option, and it auto calibrates brightness and contrast to fit. Does a decent job at it.

                                                          It isn't all that bothersome with the contrast set to zero. And set this way it actually adheres to the RGB standard of 2.2 gamma. But whoever designed it really was a dumbass as black level totally sucks with no backlight control. The brightness control doesn't do anything for like 75% of the range... and then once you go below 35 it starts eating the dark shades and turning them into (backlit) black.

                                                          It doesn't set new records for suck, but it's not too far from it.
                                                          Last edited by Th3_uN1Qu3; 02-18-2011, 03:59 PM.
                                                          Originally posted by PeteS in CA
                                                          Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                                                          A working TV? How boring!

                                                            Comment

                                                            Previous template Next

                                                            Related Topics

                                                            Collapse
                                                            • howardc64
                                                              A1312 (27” iMac 2009-2011) A1407 (Thunderbolt Display) A1316 (Cinema Display) Display Black Screen Repair
                                                              by howardc64
                                                              Problem

                                                              This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....
                                                              08-04-2024, 10:36 PM
                                                            • Kemer
                                                              Graphics Card mounting frame
                                                              by Kemer
                                                              Hello, I removed the graphics card from my laptop and I want to heat it in the oven. What I want to ask is, is it okay to heat the card without removing the metal mounting frame on it?

                                                              As you can see in the photo, there is a plastic (black) gasket between the metal frame and the card. It sticks the frame tightly to the card.

                                                              I previously removed the metal frame while heating it, but it is quite difficult to separate it from the surface it is attached to. If there is no problem, I do not want to remove it.

                                                              What worries me right now is the possibility that...
                                                              09-14-2024, 08:57 AM
                                                            • mecha1166
                                                              Reattaching new edge to edge LCD panel to tv frame - Hisense 55a6g and others
                                                              by mecha1166
                                                              Some new tvs have an LCD screen attached to the outside of the frame with foam tape. These are "edge to edge" as they are called. I am trying to figure out how to reattach an LCD panel back up to the frame. The manufacturer used 3/16 inch foam tape along the top and rh/lh edges. I used a razor blade to separate the panel from the metal frame. The metal frame that the panel is taped to is 1/4 inch wide along the 2 sides and top. I completely removed the residue from the metal frame. There is some residue on the panel itself along the 3 edges, I removed almost all of it using alcohol and...
                                                              06-13-2024, 02:28 PM
                                                            • chth96
                                                              Is it possible bridging tiny broken trace
                                                              by chth96
                                                              When I assembled dreamcast I mistakenly fastened long bolt and It resulted in
                                                              cutting tiny trace.
                                                              This tiny trace(Total width of white coating is 5.5mm) is between R337,R343 and IC101 and it is covered with white coating in the below screenshot.


                                                              Firstly I tried to bridging tiny broken trace with my own eyes...But it is totally impossible..So a week ago, I ordered G1200 Digital Microscope and I magnified this tiny broken trace with it.

                                                              But It seems that It is really very tiny trace So I plan to order 0.1mm coper wire from aliexpress in order to bridging...
                                                              12-03-2022, 11:32 PM
                                                            • Document Archive
                                                              Design of CCFL Backlight Inverters with Frame & Bar Cores
                                                              by Document Archive
                                                              Design of CCFL Backlight Inverters with Frame & Bar Cores

                                                              Summary

                                                              Portable devices, such as notebook computers and personal digital assistants are developed rapidly nowadays, which places an increasing demand on display technology. The LCD with cold cathode fluorescent back lighting satisfies the requirements on display performance, size and efficiency.

                                                              The backlight inverter plays a crucial role in supplying the power to the lamps of these flat-panel displays.

                                                              The frame and bar ferrite cores, described in this brochure, are especially designed...
                                                              10-07-2024, 04:26 AM
                                                            • Loading...
                                                            • No more items.
                                                            Working...