Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Weird behavior when turning off the lights.

25 Mar 2012   #11
wanchoo

Windows 7 Pro with SP1 32bit
 
 

Hi,

Not to worry. The digging won't me in my premises.

Amarnath Wanchoo

Quote   Quote: Originally Posted by quickdraw2011 View Post
Quote   Quote: Originally Posted by wanchoo View Post
Can't understand what is happening because I don't believe in poltergeists and ghosts. Since when has this strange behaviour started? There has to be a rational explanation if we dig deeper.
Hey, when your digging deeper...be careful not to fall in it!



My System SpecsSystem Spec
.
25 Mar 2012   #12
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

Quote   Quote: Originally Posted by 4hya View Post
attached is a rough draft of the setup
Some questions:
  • What country are you in? Is it 220v or 110v power grid?
  • Is the lamp and the PC plugged into the same wall outlet or outlet strip?
  • Are you using any wireless devices with this PC?
  • What devices do you have externally connected (printers, external drives, etc.)? And where do they get their power from (wall outlet/power strip)?
  • How old is the building you are living in (modern wiring or old wiring)?
My System SpecsSystem Spec
25 Mar 2012   #13
Dwarf

Windows 8.1 Pro RTM x64
 
 

Do you have a wireless mouse/keyboard or some other such peripheral connected to your PC? If so, what I think is happening when the light is being switched on is this. With a fluorescent light, when it is switched on, it usually flashes 2 or 3 times until it strikes and lights. Each time it flashes, a pulse of electromagnetic radiation is released, which, if it is not suppressed correctly, can cause interference to radios and other devices that utilise a wireless connection. My guess is that it is probably the starter that needs replacing, as its built-in suppressor might have failed.
My System SpecsSystem Spec
.

25 Mar 2012   #14
4hya

windows 7 x64
 
 

Philippines. Our power grid here is 220vAC. Maybe that is tech enough answer to me. The electromagnetic pulse might cause this. I don't have wireless devs connected to the pc. But have 2 printers. 1 usb mouse 1 ps2 mouse. 1 usb gamepad. 1 usb cam. Wireless router is independent. So that is excluded from the equation
My System SpecsSystem Spec
25 Mar 2012   #15
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

If there is a problem with the wiring inside the light fixture and it is plugged into the same power source as any of the externally connected devices then it could be causing a momentary short circuit or electrical arc that is briefly taking the devices off line. This would be a bigger problem than the PC issue as any electrical arcing inside a fixture is a fire hazard.

You could isolate which device is disconnecting by systematically unplugging them one at a time and testing. If you find just one device that is doing this behavior you can isolate which power source is affected and narrow down the cause.

I don't see how an EM pulse would affect wired devices, unless the cables are unshielded. That is why I am more focused on the electrical power issue.
My System SpecsSystem Spec
25 Mar 2012   #16
4hya

windows 7 x64
 
 

I'll try all your suggestions.
btw, the electrical wirings are all connected at the same line. E.g. Pc ,monitor, printer , etc. and the light is wired independently. So they are not sucking up energy at the same ac source
My System SpecsSystem Spec
Reply

 Weird behavior when turning off the lights.




Thread Tools Search this Thread
Search this Thread:

Advanced Search




Similar help and support threads
Thread Forum
Keyboard Temporarily Switches Off after Turning on Desk Lights? O_O
Hello. Um. I Don't really know what to say about this, as it seems a bit strange :eek: here goes I have a computer desk that has an overhead storage cabinet, and underneath this cabinet is a fluorescent light bar that I can switch on. It looks like this...
Hardware & Devices
Weird behavior & bad performance with new HDD
Hi everybody About 1 month ago I had some weird issue with my HDD after a power failure so I had to change the HDD with this one. I cloned it and for a short perod of time everything seamed to be fine. However, 1 week leater I start experiencing system lag & freezing. For example, if I try...
Hardware & Devices
Weird sfc/ scannow behavior
I have run that command a thoulsand times (always with administrator privileges, of course), from my personal account and also from the administrator one, I have done it from the safe mode, and I've also checked for malware with ESET and Malware Bytes. I have run chkdsk. I have run a defrag....
Performance & Maintenance
No Crash but Weird behavior
as shown here: is this a virus? Im not showing any virus or malware but have buggy behavior 1. key command: Option-Tab (for window switching). I use it all the time and it always worked fine. Now, it works right when system boots but then stops working. When invoked, it kind of half...
BSOD Help and Support
Weird Behavior IE8
sometimes when I open ie8 the welcome screen pops up. I have gone through this set things up and you're browser is ready for use well, ok but why dose it pop backup at random point when I click ie8 it doesn't happen every time its sporadic so I've just been exiting out of it as my browser is...
Browsers & Mail
You gotta see this W7 Behavior, weird
ok so I downloaded the 64bit version of the RC and installed right away on the test machine, then after setup was complete I changed the desktop to my favorite image (a bullfighter). Next I downloaded AVG (latest) from download.com, funny thing is that after it was downloaded (when I went to...
General Discussion


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 05:23.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App