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

learn more… | top users | synonyms

0
votes
2answers
23 views

Battery removed Laptop shut downs within 2 minutes on connected through an AC outlet [on hold]

I got this VAIO VGN-NR38M from my pal. It doesnt get powered on. I thought it was the battery causing the issue. I removed the battery and connected the Adapter from AC outlet, I powered on the ...
-2
votes
0answers
26 views

Is charging over USB hard to get right? [closed]

We live in a world where many if not most of our portable electronics can be charged over USB. (IIRC, even Apple's Lightning has a USB adapter) I (unfortunately) own a 2012 Nexus 7 which is ...
0
votes
0answers
27 views

“No Battery is Detected” but battery works

The Question: How do I get my battery to be detected again? My system is dual boot Windows/Linux. On Linux, for a while, the system claimed that the battery was always at 15%. Now, it says there's ...
13
votes
5answers
1k views

What is the 6-pin power connector on an HP ProDesk?

I have an HP ProDesk 600 G1 desktop PC, and I'm upgrading it with a new graphics card and a new power supply. Now, the problem I'm having is that the motherboard in the PC doesn't have a standard ...
0
votes
0answers
28 views

ThinkPad X220i appears to power on but won't start - no BIOS or beeps

I have a ThinkPad X220i laptop here (4-5 years old, out of warranty) that won't power on any more. Looking for any tips to get to the cause and repair it. The problem: When you press the power button ...
0
votes
0answers
26 views

Automatically start a computer when power turns on

I installed Ubuntu on an old laptop (Lenovo T400) that I now use as a home server, running 24/7. I live in an area where long power outages are quite common, so if the power goes off there's a good ...
1
vote
1answer
43 views

Is it safe to power a 140mA laptop cooler pad off a USB 3.0 port?

I have acquired a laptop cooler pad that connects to a USB port for power. The problem is it draws 140mA. That's more than a dumb device is allowed to draw off USB 2.0 (max is 100mA unless the device ...
0
votes
2answers
18 views

Real Machine randomly refuses to start

Folks I`m completely clueless. I have a machine with the configurations above. By some strange reason at random times it refuses to boot, fans will spin but seems no power enough is generated to get ...
0
votes
0answers
21 views

Windows XP Turn Off Monitor after x minutes option is missing

I have an XP machine that turns it's monitor off after a period of time. I am trying to disable this but when I go to the power options in the control panel the option is simply not there. Turn off ...
63
votes
9answers
4k views

“Turn off router for 10 seconds” - Quantifiable? [duplicate]

Is there any quantifiable evidence to support power cycling routers for 10 seconds or any arbitrary amount of time, instead of just unplugging and plugging back in? This is related to troubleshooting ...
1
vote
2answers
49 views

Loose power-cable connection

Low-tech but high-consequence. I have a laptop with the power-cable connection causing the power to be disconnected if it gets moved a bit. I've tried with other cables and get the same behavior, so ...
2
votes
4answers
174 views

Does charging a Li-ion battery smart phone through a computer's USB port put additional strain on the battery vs a wall charger?

I was curious about this. I read that you should generally avoid completely discharging and then full charging your Li-ion battery because this can strain the battery (though some suggested doing this ...
0
votes
0answers
13 views

Stacked transparent windows with program name tabs slid down screen while Windows 7 64-bit computer died

My Windows 7 64-bit Toshiba Satellite P755-5320 computer with 750 GB hard drive and 6 GB memory died after stacked transparent windows with tabs displaying program names slid one at a time to the ...
1
vote
2answers
50 views

Ran power through a USB port- am I out of luck?

I'd like to preface this by saying I'm an idiot. Long story short, I stuck my Acer Aspire V's power cable into one of its USB ports and the computer unceremoniously died. Plugging it in shows no ...
-3
votes
0answers
24 views

the more clock rate, the high power consumption? [duplicate]

Just a curious question. It is said that the higher clock rate chip, the higher power consumption will be. So we want to reduce power consumption, then we introduce multiple core. my question is why ...
0
votes
0answers
31 views

Why does my power supply switch off after half a second?

My computer has been working fine with an existing 650W power supply (Foxconn P55MX / intel i5 / 1 x SSD, Nvidia GTX 650). I tried to make it a bit more quiet by purchasing a 650W seasonic PSU. I ...
1
vote
1answer
45 views

Power Supply Rating versus Graphics Card requirement

Windows 8.1 64 bit Lepa N500 Power supply GTX Geforce 650 ti boost My Lepa N500 Power supply is rated at 500 watts. I read some about PSU's and it says that the overall rating isn't really what ...
0
votes
0answers
29 views

See power usage Win XP & 8

I actually have 2 questions, but as they are practically the same, I figured it would be handier to ask them all at once: 1. Is there a build-in tool on WIN XP to see your power usage? Or do I ...
0
votes
1answer
24 views

Remotely waking up my desktop through WiFi

I have a desktop computer with a WiFi adapter in a PCI slot. (It is currently unfeasible for me to get an ethernet line into my room.) 1) Suppose I leave my desktop in sleep mode (Windows 7). Is it ...
0
votes
2answers
42 views

Can Bluetooth headphones be powered solely by 3.5mm audio jack?

Is that possible for Bluetooth headphones to be powered solely by the 3.5mm audio jack? Especially if it runs out of juice? I am using Outdoor Tech OT1400 Bluetooth headphones and just wondering if I ...
0
votes
1answer
32 views

Will my laptop work in the U.S

I bought a PlayStation 3 from the us and when I moved it back to Egypt I had to use a stabilizer for it to work, do I have to do something similar for my laptop which I bought from Egypt (the normal ...
2
votes
1answer
283 views

Is it safe to use one 6 + 2 PCIe power cable to GPU

I will be installing a R9 290x that requires both a 6 pin PCIe power connector and a 6 + 2 PCIe power connector. Is it ok to use one PCIe 6 + 2 power cable from the PSU that splits into two 6 + 2 ...
1
vote
2answers
37 views

Immediate Restart After Power On - Before BIOS

When I originally built this PC, it had an issue with randomly restarting. I proceeded to try a bunch of things and ended up unplugging everything except the power switch and the cards I have in it. ...
0
votes
2answers
29 views

In Linux, how can I determine the power consumption of my HDD?

Is there a way to determine how much power my HDD(s) are using? I'm running typical (oldish) desktop with an 848P chipset and Debian GNU/Linux 7.6 (Wheezy).
2
votes
0answers
34 views

Computer wakes from sleep instantly. No lastwake information

My parents' computer wakes instantly when put to sleep. It spins down and then starts a second later. There are no devices set to wake, lastwake gives no information, eventvwr is empty, and the power ...
0
votes
0answers
23 views

Strange issue with electrical outages and charging my Asus Eee PC

I have an Asus Eee PC 1000H netbook: http://www.asus.com/Notebooks_Ultrabooks/Eee_PC_1000H/ Every now and then, during a storm or so, the electricity in my house will flicker and I'll get a power ...
0
votes
0answers
50 views

splitting 6 pin PCI-E cables

I am trying to add a second graphics card to a workstation. The machine already has a GTX970, and i have a spare GTX550Ti and GTX275 floating around. The 275 requires 2 PCI-E 6 pin connectors, the 550 ...
0
votes
0answers
27 views

Is something wrong with my ac adapter, or my laptop?

The green led light is on (the brick) when I plug it into an outlet. However, as soon as I plug the other end into the laptop, the light goes out and will not come back on until I disconnect it from ...
3
votes
1answer
63 views

is it true that UPSs act as bottleneck for computers' PSU?

Once one told me that having a low-wattage UPS would make useless my PC's trillion-watts bad-ass PSU. Is this true? Is this true even for normal plugged usage?
0
votes
0answers
17 views

No Multimedia Settings in advanced power options

my laptop is lagging when running 3D application while i plug my charge. and i found the solution. i don't know if it's working or nut but i want to try it. it says " open the power settings, then ...
0
votes
1answer
44 views

How long does it take for a new laptop battery to get charged? [closed]

I just bought a new 6 cell Lenovo battery for my Ideapad. But it doesn't seem to get chraged. It's been an hour but there is no change in charge percentage. Is it normal for a new battery. At first I ...
0
votes
1answer
8 views

Strange behaviour on LCD monitor that doesn't turn on

This monitor will only turn on on 1 out of 8 or 10 attempts at pressing the "power" button, only after I had disconnected and reconnected it to the power line before each attempt, i.e.: Connect the ...
0
votes
0answers
23 views

Installed graphics card, which color wires connect

I just installed this graphics card, I am unsure of whether to connect the graphics card 3 black and 2 yellow pin to my white plastic power supply pin which has 4 black 2 yellow and 2 red. I am ...
1
vote
4answers
143 views

Shut down PC at a determined time

I have a software (calibre ebook manager) that fetches news at 6 am. I want to do the following : Wake computer at 5:50 if not already on.(easily done in bios) A scheduler opens calibre at 5:55 ...
0
votes
1answer
31 views

Do graphics cards, HDs, and other components use different amounts of power even if they use the same slot?

I’ve had this question in my head for a while, and was finally prompted to ask after reading this question which partially hinges on the answer. My question is: does the amount of power used—and ...
0
votes
1answer
52 views

External batteries and maximum output (Multiple devices)

I'm about to buy an external battery with this output specs: AC 230V/ 50Hz. 65Watt (max 85 Watt). It would be similar to this one; picture below for reference: I’m used to see amperage ...
1
vote
0answers
68 views

USB hubs that actually implements Hub Port Power Control? [closed]

No USB hub I have tried actually seems to support "Hub Port Power Control" properly that is required for USB 2.0 compliance. The USB 2.0 standard states that : Self-powered hubs may have power ...
1
vote
0answers
66 views

What about placing a voltage regulator behind an UPS with modified sine output, to protect an active pfc psu?

I moved to an area/building where there are quite some problems with the wall-power supply. Primaraly I would like to protect my computers, secondary I would like have some affordable UPS for some of ...
0
votes
0answers
41 views

Peripherals won't start

First off sorry for terrible grammar, I'm writing this from my phone. Anyway, I've had an interesting problem with my PC ever since I moved it to a different location around six months ago now. When ...
0
votes
1answer
50 views

What do I need to do in order to protect my hardware from electrical damage? [closed]

The Specifics I've just recently started using more equipment. My set-up consists of two external monitors powered by a laptop (15" late 2011 MacBook Pro if that matters). I have a docking station, ...
1
vote
0answers
44 views

How to run an application in linux just before poweroff and after linux shutdowned itself

I have a embedded system that needs to be power off itself after shutdown. To power off, the Linux should send a command via an i2c to another device to power off the Linux board. So to shutdown and ...
0
votes
1answer
72 views

Why does my Samsung laptop computer think it is unplugged?

Samsung laptop, purchased new in 2012. Windows 7 64-bit. 8GB RAM. Model NP300V5A. I woke up one morning and woke the laptop. I had left it plugged in to the wall the night before. When it woke, it ...
0
votes
2answers
171 views

Are there 3-pin to 2-pin power connectors for motherboards

My (old) case front panel has a 3-pin power led connector (inc. one empty slot in the middle). My (new) motherboard has a 2-pin power led connector. How do I connect the two? If I try to connect the ...
0
votes
1answer
79 views

Asus laptop doesn't turn on

My girlfriend has an Asus laptop with a battery that dosen't work, so she uses it while it's connected to the wall. This laptop has been in use for 2 years+ I think, and today suddenly, it stoped ...
1
vote
2answers
1k views

Can a power bank work as a laptop battery alternative?

So here's the thing. My laptops battery is almost dead and I'm planning to buy a new one. The problem is that where I live, the power shortage is a very normal issue. I have a 15 inch basic laptop. ...
3
votes
1answer
87 views

Computer won't start unless power is removed for ~2 hours

About 6 months ago I built myself a desktop. A few weeks ago the computer started to act strange, for example it wouldn't always give a video signal when it came out of sleep. Now the issue has ...
1
vote
0answers
24 views

Prepare Debian/Raspian for Power Loss

My school is in the process of buying two Raspberry Pis for use in the commons to display the news. I'll be creating a startup script to automatically a USB flash drive with a video on it, and to have ...
5
votes
2answers
514 views

AC not working properly

Yesterday evening i used my laptop without any issue, this morning i went to work and i have noticed that the AC charger is not working properly. This is the behavior: If i connect the laptop to ...
0
votes
1answer
32 views

Laptop not powering on

Two days ago, I was hurrying to an exam and had to walk in the rain, resulting to my backpack getting rained on. When I got home, there was a tiny amount of water on the side of my laptop, but it ...
0
votes
0answers
36 views

Bluetooth Speakers Turn Off Suddenly Windows 8.1

When my computer which is using Windows 8.1 goes to sleep mode, my bluetooth speakers turn off. Is there a setting to keep the speakers from turning off when the computer goes to sleep mode? Thanks.