Screen keeps turning off and on repeatedly

Question

Good evening  I have the following problem for a few days: I turn on my PC, it starts normally, but no matter what I do, and fairly quickly, the screen turns off and on again, sometimes with a very close time interval (for example, 3 times in 3 minutes), or more randomly. Sometimes even, after a while, it stops. I have no error messages, just a black screen with the flatron logo in blue, the green light on the monitor turns off, then turns back on at the same time as the screen.  Regarding changes made to my computer, my friend recently installed a PlayStation emulator.  I have reinstalled the screen drivers, without success.  I have an LG Flatron L1730S screen which is roughly 2 years old, if I remember correctly.   Thank you in advance for your help

nortalf · Accepted Answer

Hello Jack.  Thank you for your response. I managed to take it apart according to your valuable advice! After removing all the visible screws, you indeed have to gently unclip the two covers with a very thin tool, and then remove the 4 screws on the side of the panel. Once the metal cover is removed, you then have access to the components.  And there, I saw the 680µF capacitor all swollen...  See you later  nortalf.

Sylfile · Answer

While waiting for a response, I browsed the forum and carried out the following operations:  I successfully displayed in control panel>display>power management>sleep>turn off after 20 min  I changed the resolution from 32 to 16 bits  all of this without success...  who can do better ????   thanx again

Cabete · Answer

Hi, I have the same problem. And I think the issue comes from the drivers or the latest existing updates, but I don't know which ones.  I'm saying this because when I boot my PC under Linux, everything works perfectly. However, as soon as I start Windows, I'm stuck as soon as I select my profile, and the screen goes dark in a loop.  So far, I haven't found any solution.   Sorry.

JPZ · Answer

Same problem on the same screen (LG 1730S) purchased in November 2004. If anyone has a solution, I'm all ears!

Blacksad · Answer

Hi!  This problem is due to a defect in the Windows XP boot (something weird happens to me, it's happened before). Anyway, try reinstalling XP but only do it if you have no other solutions. Otherwise, try with a good old screen that's had its time to make sure of the problem. If it still bugs, it's either the graphics card that's failing or XP...

jeanpauldortel · Answer

I'm using an Apple Mac G4 and  I have a 19" LG cathode ray monitor (I don't know what the other "specifications" are)  For a while now it turns off with a "click" and then turns back on with a "clack" while shaking a bit, and everything returns to normal (no disturbance on the desktop or on the open window or document!) until the next sporadic micro outage.  It also does this when I tap it on its left side!   I gave it a good shake and it's not doing it anymore... until the next time.   It's funny but it's annoying.  It all seems like an internal contact is fragile.  I'm hesitant to open the monitor.  I don't want to change it, even though it's a bit of a relic and somewhat old (5 or 6 years), it is of very good quality!   I'm waiting for comments from those more knowledgeable than me.   Thank you.

Elst · Answer

Hello,  UP !!

zoulette · Answer

Hello, I would like to know if you found a solution because I have the same problem with my monitor "flatron L1730S". When I turn on my PC, the screen lights up for 1 second and then turns off. I turn it off at the switch, turn it back on and it does the same thing. After persisting for a while, it eventually stays on. Thank you for your answers.

JP¨Z · Answer

Hello,   LG customer service for replacement (my screen was 1 and a half years old, it was exchanged for a new one in a few days, directly at my home!).  LG customer service = perfect!

zoulette · Answer

Hello,I took the step with LG and CT just in time because my warranty expires in a week. Thanks for your advice. I hope I won't encounter this problem again.

Lucca13 · Answer

http://www.commentcamarche.net/forum/affich 8919087 my screen turns on and off continuously  Hello everyone  Same problem, it turns off, turns back on, turns off, turns back on continuously. I left a post about this subject above!  If anyone has an answer, I'd be grateful, thanks a lot!  I haven't changed my settings, no viruses, nothing!!????

aiglenoirdu29 · Answer

Hello  No other solutions to suggest?  I also have a LG "flatron L1730S" that turns off/turns on at intervals of 3 seconds to several minutes.  I would have thought it was the power supply. -- What you wouldn't do in a real conversation face to face with your counterpart, don't take the internet as a shield to do it.

zoulette · Answer

Hello, I had the same issue with my LG monitor. It is indeed a power supply problem. My monitor was just out of warranty so LG exchanged it for me and since then, no more issues.

nortalf · Answer

Hello everyone.  My L1730S has exactly the same problem. I want to disassemble it, but I can't find the trick to do so :-(  Before bringing out the hammer and chisel, can someone share their vast knowledge to explain to the idiot that I am how to do it?  Thanks in advance.

jack · Answer

Hello Permalink  To open the screen, you need to remove all the screws that close the case, then using a very thin blade, slide it between the two plastic parts that make up the screen shell and very gently pry one part away from the other. The two covers are clipped together. It's not easy, but it's the only solution, and it works for me.  See you later  jack

deathword · Answer

go to the club

nortalf · Answer

no no, I found another method, I threw it out of the first floor window  :-) joking aside, I managed to open it and it's definitely the 680µF capacitor that's to blame (nasty two-legged beast . . .)

deathword · Answer

I will open my screen in an hour, but I assume it's the capacitor, and in that case, how do I fix it?

Skif · Answer

I just wanted to leave you a little note to say that I also have the same problem on two screens, one PB and one HP. After several tests, since there were no swollen or defective components, I realized that it was the backlighting that no longer worked, what a hassle. The only solution is to remove the back of the PC and place a good light behind it, right? No, apart from retesting everything without really finding any defective components, just throw it out the second floor and salvage some LEDs. The consumer society forces you to hope that you won't have to keep your new screen for 20 years like the good old, but robust, televisions. Lol. In any case, good luck to everyone... Skif  P.S. Don't stress, buying a new one is the best solution.

amodalie · Answer

Hello,  I have a solution that works: I have a QOSMIO TOSHIBA X300 laptop bought in 2009. My screen would turn off after 20 minutes, then the time shortened to no more than 2 minutes. The laptop continued to work in the background, but the screen was gray with a faint backlight at the bottom. I installed Spyware Doctor, but it continued, and I did a full scan, nothing to report. So the last time I turned it on, I went into safe mode and it works. To be able to browse, just choose safe mode with networking.  There you go, not more complicated.

Screen keeps turning off and on repeatedly

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