Electrical power is essential to the operation of any computer and any of its components or peripherals.

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88 views

Computer wont turn on immediately

Having an issue with my stack, I'll try to describe it as best I can. Was hoping for some advice from you kind people. I turn off my computer normally every time I shut it down, no programs running ...
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0answers
83 views

Trying to run computer off DC but monitor is always blank

I am trying to get a computer to run off a DC battery. The computer seems to start fine (the CPU fan spins and the hard drive whirs), but nothing displays on the monitor. It just stays blank, as if ...
0
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3answers
286 views

Computer sometimes doesn't boot after power failure, what should I replace?

I have a new computer that behaves strange after a power failure. When I switch off the computer it will not boot anymore. Completely unplugging the computer for about an hour cures the issue for the ...
0
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2answers
476 views

Custom built machine has much higher power consumption than expected

I built a machine according to the specs of a computer magazine (c't, Germany). According to the magazine, the power consumption should be at around 10W. I don't want to go into the specifics of the ...
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2answers
3k views

Surface Pro 2 / Windows 8.1 - Charging Issue

I purchased the Surface Pro 2 a few days ago (release day) and it has been running great, but over the last 3 days I have encountered a weird charging issue. I like to drain my battery down to near ...
0
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0answers
61 views

windows 7 monitor instantly resumes from power off

It seems that some service or program is preventing my monitor from going into power save mode but I cannot find a way to dig down the cause. Does anybody know a way to find out which event may be ...
2
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1answer
124 views

Power outage during disk wipe. What do I do now?

I was using Roadkil Diskwipe on an external hard drive and the power went out. I had removed it from any outlet connection by the time power was restored to prevent power-spike damage (it's on a surge ...
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0answers
84 views

Closing the lid of my notebook doesn't have any effect

When I close the lid on my Samsung 900x3c-A01 nothing happens, both on Windows and Linux... I've made double-sure all the OS' settings are correct, I even tried to set them up so they would shut down ...
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1answer
173 views

Should I power off a wireless device when changing an external antenna?

Currently I am using a a wireless router (Asus RT-N12) and Wireless USB adaptor (TL-WN722N). Both of these have removable external antennas (RP-SMA connectors). I want to know the correct and safe ...
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0answers
751 views

Laptop won't turn on after it was shut off. Is it dead?

I'm currently I'm using my laptop without battery because my battery was dead. I didn't buy a new battery because I don't have a cash for now. Since then sometimes I accidentally unplug or sometimes ...
1
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1answer
72 views

Why was my laptop unable to turn on?

I suspended Ubuntu on my laptop, and then carried it in my backpack to another place. Then I found that the laptop was off instead of being suspended. I couldn't make it power on either, even with ...
0
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1answer
84 views

PC will not power on with normal power supply

My ASUS M2N-SLI motherboard would not turn back on after running fine for 5 years. Connected a new (still in the box) 430W power supply - ATX 2.1 - the system powers on. The power supply doesn't have ...
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0answers
76 views

Using Task Scheduler to Run a Task possibly using event id.. i guess

I have created a task which runs on daily basis at startup, and set the computer BIOS to automatically start at 9:00 AM everyday. Also, set the powerloss - last state (this only works when the PC is ...
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0answers
94 views

Should The Plug of UPS Always Plugged?

Which is better for lifespan: Switch off the UPS and plug off or Switch off the UPS and leave it plugged in. Consider this two statements and give seperate replies: Which is better for >1 Month ...
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2answers
138 views

How does the BIOS disable a controller on the motherboard?

What happens when you disable a controller in the BIOS? How does it stop the OS from picking it up when it scans the buses for devices. Does it stop power going to the controller, if so how does it ...
3
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1answer
125 views

Is my power supply dead?

I recently bought a new NZXT Phantom case and went ahead and moved all my components from the old case. It took a while to get some things in, and then to do a little bit of cable management (as much ...
0
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0answers
40 views

First build, circuit breaker problems

This is my first build, so please excuse the fact that I don't know the correct terminology. I just built my first computer last weekend. Essentially I got everything installed last Friday, and ...
0
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0answers
126 views

Game freezes and sound turns off for 2 seconds after light switch is turned off, can be reproduced

I have similar issue as this Question Weird things happen to my PC when light switch is turned off Each time the light switch is turn off in the kitchen while I am playing DOTA 2 the sound turns off, ...
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1answer
1k views

20+4 pin power supply to 24+4 pin motherboard [duplicate]

I'm thinking about making a small custom-build server. It would only use around 60W maximum. I don't want to pay too much so I think using an old power supply would work. The motherboard I'm ...
0
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0answers
50 views

notebook fails to start frequently but sometime it works great

-cpu and ram test and stress test pass when works -bios reset or load default setting didn't work -disconnecting every components and taking out mobo again no luck (only posts sometime) -no luck with ...
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1answer
356 views

Fried ASUS laptop with universal charger?

Several days ago, the charger for my ASUS K50IJ laptop (19V, 3.42A) died. So, I bought an Omega universal charger with 11 different plug-ins, but I managed to first use the wrong plug-in (I later saw ...
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0answers
28 views

How to turn on laptop with external power button [duplicate]

I want to turn a laptop into a desktop computer by connecting it to a monitor and mouse & keyboard, however, it is very annoying to have to open and close the lid every time i want to turn it ...
1
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1answer
239 views

USB: What is required to “add” bus power?

Question: How can I add power to a USB cable without using a USB hub? ... Background: I have a USB device that runs on bus power. I don't know how much bus power it requires (I googled). When I ...
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4answers
221 views

PC power usage related to power supply

Not sure if this is the right place to ask such a question, but I don't see a more relevant place on stack exchange otherwise. So recently I've become kind of obsessed with becoming more efficient ...
2
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1answer
99 views

How can I determine the electricity usage of a pc when at full load? [closed]

I would like to contribute my idle processor power for something good.I usually seed to p2p network, but I hope this doesn't require much amount of processor utilization? So I installed BOINC software ...
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1answer
1k views

Is it possible for an x86 processor to match an ARM processor in terms of performance per watt?

From my personal experience with my tablet, and from the benchmarks and articles I've read, it always seems ARM processors, as seen in virtually all mobile devices, deliver incredible performance for ...
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5answers
3k views

Does Android or Java use more power since it's running on a virtual machine?

Since Android applications run on a JVM (Dalvik VM) which is basically a virtual processor, and every virtual instruction has to be mapped to the underlying chipset's native instruction, does this ...
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0answers
229 views

Can't see the power options icon in the notification area

I've formatted my windows 8 64 bit laptop, and encountered the following issue: The power options icon won't show up. I tried adding it manually, but it shows the massage "This notification icon is ...
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1answer
119 views

My PC start although it is turned off

My Problem: I shut my PC down Then I disconnect the plug Few hours later I reconnect the plug and the PC starts to boot for a short period and then turns off After that I can start the PC as usual ...
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2answers
1k views

Can I use a second power supply for hard drives? [duplicate]

I have an old Pentium-M based Shuttle PC that is great as a backup NAS solution at home, where I prefer low power consumption over speed. It only has two SATA ports. However it has a PCI slot and I ...
2
votes
2answers
3k views

How can I set my Windows 7 desktop with a UPS to automatically turn on after a power outage is over?

I've got a Windows 7 desktop system with an APC UPS to provide backup power during power outages. I've got the UPS connected to the system with a USB cable so that the built-in Windows power utility ...
0
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2answers
197 views

Laptop has black screen and fans on when on battery power

When trying to turn on my laptop using just the battery, the lights and fans run, but the screen and all other operations do not work. When the power cord is plugged in, the laptop works fine. It ...
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5answers
245 views

NAS not shutting down

I'm running a network attached storage appliance (Iomega ix2-200) which is running some sort of Debian variant. Recently, the unit has been unable to shutdown cleanly, either via the web interface or ...
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1answer
162 views

No guest shutdown in Linux/Ubuntu?

I had to shut down a bunch of Linux boxes tonight because we have an upcoming power outage for the whole building. I did not know any passwords for most of the boxes. So, (on the Ubuntu desktop) I ...
5
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3answers
969 views

Linux vulnerable to corruption in power outage?

The sysadmins at my company say that Linux is prone to getting nuked by a power outage. They say Windows machines always survive power outages but Linux boxes often become unrecoverable (ie you can no ...
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2answers
649 views

Should a NAS always be on?

I'm thinking of purchasing a NAS that can do RAID1, to have a local backup. Can such a device be left always on ? What happens in case of a power outage ?
0
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1answer
323 views

I may have fried two completely different computers

I have two computers: my main one, and an older one. Currently, both are fully hooked up, and neither will respond when the power button is pressed or held. No fans, no lights, no sign at all. Prior ...
1
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0answers
127 views

How important is it to keep UPS connections either filtered or not?

This question is somewhat difficult to summarize into a good title, so let me explain what I am talking about. I have a setup where an ADSL modem connects to the telephone network. The power supply ...
0
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1answer
55 views

Ups not going on battery

I've got a new UPS for my computer and I experienced the first power outtage today. I had previously tested the battery once fully charged by shutting the appropriate breaker down and it went on ...
1
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1answer
127 views

Can a consumer-level (i.e. cheap) UPS trigger a custom script on power failure on Linux?

I am essentially trying to build is a poor mans server failover solution. The non-profit organization I am part of is planning to host several web applications. In order to save on hosting costs we ...
0
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1answer
116 views

Motherboard LED comes back on without PSU switched off

Wondering if anybody has experienced the following issue Shutdown Windows, PC shuts off, Motherboard Start LED remains lit Turn off Power via PSU rocker switch Motherboard LED takes 2-3 secs to ...
1
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1answer
10k views

Do I need to replace my CPU or Motherboard, PC not powering on

My PC will not power up at all, after thinking it was the PSU I replaced that to no resolve. When I try to power on the PC the CPU fan will move about 1mm and then nothing. I tried all sorts, but it ...
2
votes
1answer
103 views

My UPS gets very loud when turning on the oven

My UPS starts making a rather loud noise (which sounds a bit like a very loud version of a fridge's motor) when I turn on the oven. It's also vibrating quite a bit when that happens. It's the only ...
0
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0answers
344 views

Why is my UPS causing my monitor to make a high pitched humming noise

I recently purchased a UPS for a new server build for my home. Since the server sits next to my desk, I figured I'd plug my Macbook and monitor into the UPS as well. That way if the power goes out, I ...
0
votes
3answers
2k views

How to check for any damage done after sudden power unplug?

So I recently moved in together with my girlfriend. And just a moment ago while I was playing a game (Civ 5) she accidently unplugged the power cable to my PC. I swtiched on the power again, and ...
0
votes
2answers
6k views

Battery shows 100% charged but netbook does not work without AC adapter

How can I test if the battery is connected internally to my netbook or if it is working? Is it possible that the battery has been disabled by a software setting? The battery shows 100% charged, but ...
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1answer
41 views

PC just rebooted itself, failed to restart automatically now refuses to boot [closed]

I tried to restart automatically but it failed after about 2 secs. It won't switch on at all now. What part just failed? It's a desktop.
3
votes
1answer
673 views

I can't charge my iPhone using my Apple Wired Keyboard on Windows

On OS X, I can charge my iPhone without any problems, but Windows always complains about not having enough power, regardless of what USB device I connect to the keyboard. Why is that? How can I force ...
0
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0answers
305 views

Ubuntu 12.04 shuts down suddenly when running on fully charged battery

When I use battery power in Ubuntu 12.04, it sometimes suddenly shuts itself down without any warning even though I am sure that the battery is almost fully charged. This never occurs when plugged in ...
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2answers
2k views

Power button doesn't turn on the laptop on first attempt

I have Dell 1764 for about 2 and half years and just recently power button start creating problem when I try to turn it on (it happened like over a night when i turned it off very fine and next day ...