Monitor Blinks when turning lights off

Page 2 - Seeking answers? Join the Tom's Hardware community: where nearly two million members share solutions and discuss the latest tech.
Status
Not open for further replies.

javacookies

Honorable
Dec 8, 2012
11
0
10,510
Hi,

I'm really curious. This is not too life breaking :D. Since I replaced my VGA cable with DVI, my monitor always blinks for about 1 second whenever I turn off a particular light. There are two lights near my PC but only the one in our living room triggers the blinking. So what's up with that? I'm also worried that it could be a serious matter. Thanks.
 
Solution


Can't tell from that picture but it definitely is how I fixed my blinking monitor problem caused by interference from circular fluorescent lights switching on or off. Also running extension lead for monitor to another power point across the room fixed it too but that was not a long term solution.

I've since had a closer...
adimeister,

1> I'd only heard of AVR for generators- output devices- and didn't realize they were made for computers- as an input device. This seems to be a really useful idea, but I couldn't find anything very specific on a consumer level- can you give an example of one that you might use?

2> When you mentioned Macau, a place I only knew as being across a Bay from Hong Kong, I had a look at Macau in Google Earth, and saw what seemed the strangest thing I've ever seen on Google Earth- the street and place names in Macau.

Thee names are so amazing in that they are so unexpected. There is small bay called Guan Zhacun. To the south and slightly west of that bay is an area with several city blocks of square 4 or 5 story buildings- with central courtyards, probably flats called strangely, "Our Lady of Fatima's Parish". Street names include, "Avenida Leste do Hippodromo", Rua de Graciosa", "Avenida do Dr. Francisco Vierira Machado", "Avenida do Admirante Magalhaco Correira", Avenida de Artur Tamagnini Barbosa". There were very, very few Cantonese names and it struck me as odd as if I looked at a map of Mexico City and all the names were in Swedish.

At first I thought these were simply the Portuguese translation of Cantonese but because the names of people were so Iberian, I had to remember there was a Portuguese influence in Macau in the way there was an English one in Hong Kong.

This just seemed impossibly exotic- a wonderful surprise that really woke me up this morning!

Regards to Macau!

BambiBoom
 

adimeister

Honorable
@bambiboom: hahaha you've researched it huh. Yea, Macau has been raped by the portugese. haha There are a lot of pretty Macanese (cross breed of Chinese and Portugese variants HAHAHAHAHA) here.

Anyway, I think the problem here now is the wiring in the apartment. Because when I was cooking, I turned on the big-ass exhaust fan then the monitor blinked again.... Oh well. Chinese quality.... hahaha

AVR like this would do I guess. http://pcrxcomputing.com/Accessories/UPS-AVR?product_id=565
 
adimeister,

Macau > Whenever I have a conversation with someone from a place I've never been- I've never been East of Budapest nor West of Hawaii- I use it as an excuse to see what the cities are like. As an architect, street layouts, type of housing, proportion of of parks, the kind of cars, and so on are always interesting.

Yes, as I thought more about it, the problem is not probably RF ( I may not need the tin foil hat after all), but a simple electrical surge or undervolt from switching noise. If I had a DVM, I'd try in on the TV outlet and see what the numbers are when the bathroom light is switched.

I had a look at the AVR to which you linked- it has a pleasant industrial quality to the appearance. Is it possible that it's 300 Philippine Pesos- $7-8 US!

I'm still running my television machine from the power conditioner.

Cheers,

BambiBoom
 

adimeister

Honorable
@bambiboom: Wow bro, you're an architect! That's nice. :) I tried to be an engineer when I was in college, got lazy. Now I regret, really.. Stuck on a sucky job, etc.. Enough ranting now. hahaha

Really?? I never realized that the "colonizers" would have that advantage, I always thought that the countries which got colonized would always have the advantage. Like having a better economy, adapting to Western or European food, having better genes (sound funny but I'm happy with this one!), etc...

I'm originally from Philippines, we have so much beautiful people there because the Japs, Spaniards, and Americans raped our ancestors. hahaha So we have a lot of western influence, more than you can imagine!! But I'm happy with it, unfortunately we have so much corrupt politicians so we never really had a chance to prosper after the Americans left us. Oh well.. hehehe

Where are you from bamiboom?

I'll try to find an AVR here in Macau, hopefully they have one. The people here are 60% well off so they don't really care about their money and surge protectors or anything like that. It's not a "thing" here. They tend to always buy the newest tech here..

The streets here are in Portuguese and Cantonese, thank God! It would be such a headache if it would have the four numbers that you said. haha
 
adimeister,

Computer content > Had a long day of CAD today- designing a beach house on the East Coast US- and was slightly alarmed at the temperatures of the RAM- 83 C (typically about 72-75) and the CPU cores were warm too- 65C (usually 61-63). The highest RAM temperature I've seen was 85C and I panicked until I learned that DDR-2 is hot, hot, hot. I felt a little better when I read of those with DDR2 seeing 89 and 93 C. The odd thing was that I had placed a fan on the floor focusing air at the lower front grille (Dell Precision T5400) and which has a a fan behind it drawing air in- and the temperatures went up a couple of degrees. When I removed the fan, the temperatures went down. Counter intuitive!

You bring up interesting point regarding colonization. As a kid - born in the Midwest, US- I noticed that dogs and cats of random, mixed breed seemed healthier, lived longer, and had better personalities than very pure bred ones. Later, I heard a great term the English have for this tendency> "hybrid vigour"- mutts are stronger. Likewise with people, I noticed comments about inbred royalty that more often had problems like hemophilia and epilepsy.

To me, there's no question that there are sometimes advantages to those colonized- if- it's a benign form which was rare. I liked very much the scene in the Monty Python movie , "The Life of Brian" in which the revolutionaries complain about Roman occupation, "Besides the legal system, technology, sanitation, roads, education, and military protection, what did the Romans ever do for us?" Spanish colonization of Central and South America was less pleasant- slavery, English dominance of India had a stabilizing influence, but went on about 150 years too long, so it varies.

But, you're right that a mixture introduces a vitality of a sort both culturally and even as an expansion of the gene pool- like "hybrid vigour". Culture clash though too often causes conflict and in the US- almost entirely composed of immigrants and proclaiming equality- there is an ironic / hypocritical backlash against immigrants.

And, you're right about mixed populations sometimes being very attractive and the Philippines is a good example. My cousin has lived on San Miguel since 1984 and he sends me photos of the people there- and they're all beautiful- and look very happy even though they are very poor- no general power or water system and only a mile or two of paved roads. It sounds peaceful and quiet.

In Los Angeles, I pick up food from a Chinese restaurant, where I read the free Philippines newspaper while waiting and it was always full of stories of the corrupt politicians. Years before there was Imelda Marcos and her 3,000 pair of shoes but then came the stories of the B-movie star Estrada - like Reagan- that became President under suspicious circumstances and who is said to have ordered the killing of a gambler that gave him millions in casino kickbacks. The situation seems almost comical, except as you mention, the corruption has been so widespread and so few people control all the money that it repressed the economy.

Cheers,

BambiBoom
 

adimeister

Honorable
@bambiboom: Damn bro that was too informative, too much detail. Makes my brain hurt. hahaha Just joking. Yea, of course there are cons (a lot of them). But I didn't live in the timeline where the colonization is taking place, so we're more lucky than our ancestors that's for sure. I also heard about that in NatGeo, crossbreed or hybrid genes brings out the best qualities. Like what you said, more healthy and more physically strong.

With that being said, we Filipinos, now feel the advantages when the US colonized us. Imagine if we were like North Korea, damn!!! We're more open minded, more exposed to other cultures, more civilized. What I'm trying to say is, we're more like ready to mingle with anyone in the world. hahahaha Unlike other countries who are more conservative and think that their norms are super normal (like eating fetus ehem ehem ehem china ehem). hahaha

Anyway, I had an experience with CAD also!! :D But only until simple lenghts, cubes, honey comb structures. :D hehe That was fun, more fun than the manual drawing!!

Yea, so much corruption that they want to take what is more than what they need. I don't believe corruption is absent in the US too. But if it exists, I think they only take a small amount of money just to eat at a fancy restaurant on one weekend, or spend a 3day vacation. In Philippines they steal so much that it's intended for retirement purposes. sad. haha
 

javacookies

Honorable
Dec 8, 2012
11
0
10,510
Wow! I'm surprised this thread is still alive and there are others who experience the same mysterious problem I have although the last few replies are a bit out off topic :pfff: :lol:

look who's here...guess what....Akalain mo nga naman....i hope he still understand that even he's in Macau now,hahaha

Anyway I want to join your very interesting conversation but i'm not an intellectual person like you :pt1cable:
BTW just to let you know I'm still experiencing the blinking problem and I'm not taking any action about it,hahaha
 

Shazia44

Honorable
Dec 6, 2013
1
0
10,510
I'm facing this issue with my Samsung LCD TV. It blinks on HDMI mode when I switch on or off any switch. this doesnt happen when the AV mode is on.

Any suggestions?
 

flamesser

Reputable
Mar 4, 2014
1
0
4,510
I am having this problem with my monitor, whenever i switched off the lights there is a CHANCE whereby my monitor will goes off for 1sec and back again... Pretty weird... which is why i decided to google this which led me to this thread.. have circular florescent light too!
 


flamesser.

Thanks for adding another fluorescent light to the evidence pile.

I decided at the time this thread was current, that the fluorescent light had to be the trouble, though I still don't know exactly. I always meant to put a DVM on the outlet and see what happened when switching the fluourescent light on. I simply plugged the Blu-Ray and TV into another outlet some distance away on a long, large gauge, outdoor three-prong cord- I think on another circuit and never again had the problem.

Cheers,

BambiBoom
 

adimeister

Honorable
Hey just to update too! I had that problem before when I was in a cheap apartment in Macau. Now, I've moved back to Philippines and the problem is gone!! I've played with the lights all over our house, NEVER HAPPENED AGAIN!! :D I believe it's with the whole house's wiring system, and not with any lights bro.. Because back then when I was in Macau, when I switch on OR off any electric appliance, my monitor would turn off.
 

inix

Reputable
Mar 16, 2014
16
0
4,510
All right guys, I too am facing this problem and it is very frustrating. I don't have any fluorescent light in my house. I can agree with adimeister though, wiring in my house is not done properly and there's most definitely no earthing done here, however latter should not cause this. It's a new Dell S2240L and I have been using it for 2 days, bought a double battery 800VA UPS hoping it would solve the issue, but it didn't (although I had to get one anyway). I have stashed VGA cable somewhere in those boxes, will check with that tomorrow.

I was also experiencing horizontal disturbances (like Jesse's screen when they test the giant magnet in Breaking Bad), but they're almost gone since I installed the UPS.

I won't be re-doing my house's wiring because 1) I'm a tenant, landlord won't allow it and 2) that doesn't make sense as it's not causing any damage to the electronics as evident from replies above.
 

fuck you BASTARDS

Reputable
Apr 21, 2014
1
0
4,510


yes - that what i was guessing

I have doubled the voltage
( in accordance with specification)
not much help

but after a while it wend all dark

so i sent it to Samsung

let's see if they are going to change the transformer( that's what would i do if i have second chance to play with it)
 

Liquid_Mind

Reputable
May 15, 2014
1
0
4,510
i bought a 22' lg monitor and it started to blink for 1-2 seconds everytime i turn on the light ( fluorescent ) lamp only , but more strange than that /...,, my other monitor lg 19' in another apartment started to randomly flicker the same way but without turning on any lights ,
i started to find out why it does that until today when i turned on the bug zapper and it started to act the same every time the bug zapper catch a mosquito , and sometime not blink with the zapper but it blinks about 7 of 10 catches of zapper ..i 'm so curious to know what happens and how to fix that problem ( if we can change a cap or so in the monitor or even make a kind of pass filter to prevent what ballast does :D ,, thx in advance >>> ( all devices works on 220v

update : both monitors work on vga cable ,, never tried to use dvi or any cable else
 

stanchung

Reputable
Jun 9, 2014
1
0
4,510
I have signed in to chime on this problem.

Every time a light[fluorescent] or my air conditioner clicks, my Dell2440L monitor flickers off for one second.
In fact any appliance I turn on or off in my room or outside surrounding area causes it.

Previously I had a problem of loud 'PAP' sound from the mini speaker when switches were turning on or off. I put in a Belkin surge protector and this sound was large minimised to a derp but it doesn't help with the monitor problem.

Wondering if anybody has had success with an AVR and what spec would you recommend.
Thanks in advance. :)
 

gurunadh2k1

Reputable
Aug 16, 2014
1
0
4,510


Hey, is this problem solved by now? I am facing this issue now. Want some help.
 

Buppy

Reputable
Nov 4, 2014
2
0
4,520
Use a decent HDMI or whatever video cable you're using that has thicker wires and the problem will go away. Cheap thin cables with the thin wires cant withstand the interference of the fluorescents switching on and off so the video signal is dropping out.
 

KhaoMaNee

Reputable
Nov 8, 2014
2
0
4,510


I'm using the standard HDMI cable provided by the sony HDTV. I've attached the image.
So you're saying avoid this one and those flat ones too?

30jqvet.jpg


 




Buppy and KhaoMaNee,

My experience with this problem may or may not have been RF interference but might have been power surge or undervolt related. My experiment was to leave the monitor in it's original location and run an extension cord that was certain to be on a different circuit than the fluorescent light in the bathroom causing the trouble. The complication in the experiment was that the extension cord was connected to an isolation transformer type power conditioner (these are used in science labs and hospitals) with a high level of RF filtering too. This meant that the monitor and the HDMI cable were not changed, only the power source, and that cured the problem.

Cheers

BambiBoom
 

KhaoMaNee

Reputable
Nov 8, 2014
2
0
4,510


Hi BambiBoom,

That is EXACTLY what I wanted to try to do next but I don't have extensions long enough.

I have always thought that this is a power fluctuation issue (or something u mentioned, sorry not really verse with power). I have however tried:

1. Connecting the monitor power to UPS, the problem still persist. This could be due to my UPS is not up to par. Some have recommended Pure Sine Wave UPS but It's too expensive.

2. Connecting the monitor power to voltage regulator. I didn't see any change of voltage on the readings from the unit.

So how does a normal home get an "isolation transformer type power conditioner"? that is unknown to me :p

 
KhaoMaNee wrote:

"Hi BambiBoom,

That is EXACTLY what I wanted to try to do next but I don't have extensions long enough.

I have always thought that this is a power fluctuation issue (or something u mentioned, sorry not really verse with power). I have however tried:

1. Connecting the monitor power to UPS, the problem still persist. This could be due to my UPS is not up to par. Some have recommended Pure Sine Wave UPS but It's too expensive.

2. Connecting the monitor power to voltage regulator. I didn't see any change of voltage on the readings from the unit.

So how does a normal home get an "isolation transformer type power conditioner"? that is unknown to me :p
"

KhaoMaNee,

As I mentioned, I am not certain still whether the condition is caused by RF interference or power issues. Still, it was solved by having the power strictly regulated and filtered. The power conditioner does recreate a pure sine wave of accurate current.

The devices that do this, isolation transformer type power conditioners, have large transformers and various filters.
I have five of these units, made by Powervar and OneAC varying in capacity from 6A to 12A, purchased off Ebay. In Los Angeles I had the problem of extreme RF and in my living room the power could vary from 108V to 128V on the same outlet depending on the time of day and season. I use them on all my computers and all stereo equipment except for vacuum tube power amplifiers. It's quite amazing how much less noise occurs when a tube preamplifier is run on a power conditioner. These are used in labs and hospitals to regulate equipment and are quite expensive new- a 12A might cost $1,600, but used are not too expensive:

http://www.ebay.com/itm/POWERVAR-Power-Conditioner-6-0-Model-ABC600-11W-PN-61072-22-6A-/331341465595?pt=LH_DefaultDomain_0&hash=item4d257d87fb

> a completed Ebahh sale of a 6A Powervar for $77. However, these are very heavy and the shipping can cost almost as much as the unit!

I also have had noticeable improvements when I replaced certain outlets with hospital graded outlets and I use a 20A outlet on a 15A circuit. This is the one I use:

http://www.ebay.com/itm/HUBBELL-WIRING-DEVICE-KELLEMS-HBL8300RED-Receptacle-20A-125V-RD-Hospital-Grade-/201203261051?pt=LH_DefaultDomain_0&hash=item2ed8a61e7b

> and these have a very positive contact with the plug.

In some ways I am somewhat hesitant to recommend these except after all other experiments fail as I'm not completely certain of which factor is helping- voltage regulation, conditioning, or RF filtering, but in general I believe I've been much kinder to my electronic equipment through their use.

Cheers,

BambiBoom
 
Status
Not open for further replies.