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

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1answer
357 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
47 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 ...
-1
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1answer
185 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 ...
1
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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
126 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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0answers
77 views

newly replaced laptop battery seemingly discharges

I am also referring here to Laptop battery holds charge, but won't charge any more. I may have the same problem but I am not sure, maybe DaBaer could answer me? The battery is a replacement ...
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4answers
179 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 ...
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0answers
281 views

Asus k50ij won't start, power problems

I am trying to fix an Asus L50ij laptop. Symptoms: lost all battery, wouldn’t turn on on power cable. My first guess was the power jack, because the transformer was good. I opened it up but the ...
2
votes
1answer
82 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 ...
4
votes
1answer
676 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 ...
0
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0answers
32 views

DP35DP Won't sleep

When I put the computer into sleep (manually, going from start menu, or when it automatically does it), the computer actually shuts down. Then, by itself, it starts up again, and gives me the ...
8
votes
4answers
2k 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
148 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
95 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
350 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 ...
1
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1answer
966 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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0answers
82 views

Powering a pico-ITX board with a UPS board for long intervals

I'm putting together a project to make a DIY "Tablet PC" with readily-available products that I can put together and use with little soldering effort. I have the motherboard and a 10" touch screen ...
0
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2answers
167 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 ...
0
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0answers
30 views

Dell insperon 545 won't power up after being switched off for 2 weeks whilst on holiday, has solid green LED but nothing else

No problems before this. Standard build. Tried power off and resetting for 60 seconds to no avail. Is there anything else simple that I can try before getting somebody who knows more than me (that ...
7
votes
3answers
139 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 ...
1
vote
1answer
103 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 ...
4
votes
3answers
386 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
335 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
174 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 ...
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0answers
65 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 ...
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1answer
48 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
85 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
94 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
5k 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
89 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
202 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
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3answers
477 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
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1answer
2k 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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votes
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.
1
vote
1answer
359 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 enable ...
0
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0answers
212 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 ...
1
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1answer
772 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 ...
2
votes
3answers
247 views

Is my PSU failing or is it my motherboard?

Let me first start by saying that I searched for other questions that matched my situation and I wasn't able to find any. So, here's my issue: Sometimes, when I turn on my desktop, it does not ...
0
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0answers
189 views

Computer freezing up randomly and monitor blacking out going into power saving mode

I'm running Win7x64 on an Intel Quad Core 930. Ram-12GB x2000Mhz, 2 way Sli on Nvidia 480 GTX. I've been experiencing the following problems: Monitor would randomly freeze up, go black with power ...
-1
votes
1answer
656 views

5V power adapter for 12V router?

I just bought an used Linksys E4200 router (V1). On the back of the router it says 12V 2A, but the power adapter I got (model number AD 5V/2F) says 5V 2A. So the voltage is different. I tried it ...
0
votes
1answer
433 views

Power to VAIO laptop ports while plugged in

I have VAIO E series (SVE) laptop. While charger plugged in, touching VGA/HDMI/USB port metal casing gives me burning sensation. So, I checked it with voltmeter and I found that while plugged in there ...
0
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2answers
224 views

How to power 2.5" USB harddisk from ASUS WL500gP v2 router

I would like to connect my 2.5" Seagate HDD to ASUS WL500gP v2 router and use it for file sharing. The HDD or it's enclosure doesn't have external power cord, it has only one (single) USB cable to ...
2
votes
2answers
391 views

Is turning off electronics at the wall outlet bad?

I have a few monitors and an AV receiver. When I leave my workstation, I often want to turn these off. It's tedious hitting 4 buttons and afterwards unplugging my main screen — the power adapter ...
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0answers
18 views

Why laptop resumes when other device is powered on?

I've got 2 laptops (quite new) on different power supplies. Both works strange. The First one is resumed when power strip (laptop is plugged in the power strip) is switched on. The second one is ...
2
votes
1answer
280 views

Can the wrong power cord harm a desktop computer

Can the wrong power cord harm a desktop computer - my daughter used a TV power cord and the computer will not turn on. Thanks!
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2answers
125 views

My computer runs fine until it shuts down. Then it needs to be unplugged before it will start again [closed]

Once started, it will run fine, for days on end. But once it shuts down, restart after an auto update for instance, it dies. When I try to start the computer, the fans sputter a little, but never get ...
1
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2answers
124 views

Can I create/save a hybernation state to recover from *without* actually hibernating?

I'd like to be able to have my computer resume to it's last state (open programs etc) in the event of a forced or unintended power-off without having to actually hibernate or hybrid-sleep my machine. ...
2
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5answers
2k views

Why does Windows hang (until I press and hold the power button) after issuing a software shut down/restart?

My server, which I built with some spare computer parts, does not power off after when I shut down from the OS. When I try to shut down, Windows closes all programs and goes through the shutdown ...
0
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1answer
127 views

How does a computer crash while powered off?

When I put my desktop computer in sleep mode I can simply wake it up by pressing a button on the keyboard. Easy! But whenever there's a power outage the computer needs to do a complete boot up to ...
0
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1answer
53 views

Power off device from Linux

I'm trying to find out a way to power off device (hard drive) via sysfs or anything else. What I've found, it's receipts to turn off power supply from usb devices, but that's not what I'm looking ...