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

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pavillion dv6 fall &liquid damage

I have a HP pavillion dv6 with win7 a Phenom II 940 and I think 5650 dedicated graphics adapter. It sustained a bad fall and the screen is broken, and also may have had some liquid spill on it as the ...
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1answer
24 views

Do power adaptors need cooling?

I am thinking about moving all my wires into a box under my desk drawers and was wondering about the power adaptors for monitors and my xbox, laptop etc.. Do they need cooling or can it just get ...
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0answers
4 views

Reasons for display not turning off

My computer is set to turn its displays off after 10 minutes, yet it often does not. When I run powercfg -requests I get the following: DISPLAY: None. SYSTEM: None. AWAYMODE: None. EXECUTION: ...
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1answer
13 views

Panasonic Toughbook won't turn on

A Panasonic Toughbook, model CF-W8, fails to start. By mistake I tried to turn it on through another laptop charger which provides higher voltage; the Toughbook only uses 16 V.
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1answer
44 views

Non physical hardware switch

My laptop comes equipped with a hardware switch on its backside that connects/disconnects the battery. When I am connected to AC for example, I can thus avoid overcharging the battery. Yesterday ...
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1answer
24 views

Can I disable “write-cache buffer flushing” for an Intel 730 SSD on a desktop PC

Can I disable "write-cache buffer flushing" for an Intel 730 SSD on a desktop PC without UPS? This drive has capacitors for power-loss protection - is this enough to flush the buffers when a power ...
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0answers
20 views

Just curious about these pcie cables that comes with these power supplies

My corsair 850 died on me but I still have the cables that comes with it I ordered a evga supernova 1300 g2 and wondering if it's safe to use the corsair pcie 6+2 cables on a evga supernova or should ...
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1answer
40 views

CPU turns on then off if pins not removed

My computer's power on button's no longer working so my friend rewired it to use the restart button as a power on button. I don't know what happened but suddenly when I try to turn the computer on, it ...
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32 views

When laptop battery on “High Performance” it stops charging the battery

I'm using an ACER Aspire 5750G and my laptop specs are: Proccessor: Intel Core i7-2630QM Display: 15,6 LED LCD Nvidia GeForce GT 540M - 1GB - CUDA Memory: 8GB HDD: 750GB DVD Super Multi DL drive ...
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1answer
23 views

How does dual PSU setup work?

This just an academical question, I am not looking to buy anything, I would just like to understand how it works. There is a number of dual PSU servers, eg. they have 2 power supplies, each running ...
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1answer
49 views

Reduce power usage while computer is “off” [closed]

Recently I bought a device to measure the wattage from devices. To test the apparatus I measured 6 watts from an IKEA LED light bulb which was supposed to produce 6 watt usage and a few laptop ...
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0answers
25 views

Samsung SyncMaster SA850 won't turn back on

My wife have been using this monitor for 4 years with the same setting - Windows is set to turn it off after 20 minutes of inactivity. However, today, after the monitor was turned off automatically, ...
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1answer
58 views

DC-input motherboard How does HDD get power? — ASRock H81TM-ITX

This may be quite a simple question, but I do not know much of anything when it comes to building motherboards, voltages, wattages, and power. I am looking at this board - ASRock H81TM-ITX ...
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0answers
20 views

Lenovo t400 s7 cmos

Hi my battery is dying dead and now my ac power is intermittent. It will start and run on ac and battery for a few hours but dies. It will not run on ac alone, although the power light flashes. Now ...
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1answer
129 views

Can I charge my laptop using a power bank using my laptop charger?

I have a Dell XPS-1530 laptop with a 9 cell battery. It's working fine but I was just wondering whether I could use a power connector or something to plug my laptop charger's 3 pin plug into another ...
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0answers
28 views

Sata Power Connection Broken Off but Pins are ok

So, that crappy plastic connector holder on my hard drive broke off while I was moving drives around. Does anyone have any suggestion on a work around, I've tried crazy gluing a Sata Power plug to ...
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2answers
56 views

How to ensure an external DVD drive will receive sufficient power from a USB port - before purchase [closed]

There are various external USB drives, some require external power supplies, some have optional external power supplies, some have 2 USB plugs, 1 for power and 1 for power + data. If I have a device ...
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0answers
11 views

Monitors consistently powering on and off for roughly one hour after being turned on. What might be the culprit?

I connected 3 external monitors to a Surface Pro 2 (Windows 8) by placing the device in the Surface Docking Station, and connecting: One USB port to a single HDMI cable via an External Graphics Card ...
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1answer
32 views

Power Brick humming [duplicate]

When a power brick is humming is that a bad thing? What does it mean. Does having it plugged into the wall directly or in a UPS or in a daisy chain of power strips make a difference
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0answers
39 views

Laptop won't turn on, only power button lights up

My laptop is failing to turn on fully. The only thing that happens with the laptop is the power button lights up. It stops lighting up after about 8 seconds of me pressing it and once I release it, it ...
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1answer
31 views

MSI GX660 laptop power fluctuations

Okay. So my trusty laptop has come down with an issue. It won't always take my power supply, resulting in 2 cases. One is that it simply does not receive the power, the other is more peculiar. The ...
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1answer
112 views

Windows 7 - Change what closing the lid does, UTILITY/CMD

I wonder if anybody knows a utility, or command, which can change this setting in windows in one click. I often need to change it on my laptop whether I want it to do nothing when the lid is closed or ...
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0answers
25 views

Can I safely abort a Windows 8 update-restart?

My Windows 8.1 laptop is stuck in a bout of 50 updates. These are horrendously slow and are delaying my work. Can I safely interrupt the update process, i.e. issue an ACPI power off?
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33 views

Why is Erlang wasting my power? [closed]

I usually don't plug in my dev machine until sometime after lunch because mornings are very... Mobile? ...at my job. This is cool and all because mornings are also fairly short and my laptop has ...
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1answer
305 views

Windows 8.1 not activating screen saver, turning off monitor, or sleep mode

Any ideas on what would cause this? No applications that I actively run should be preventing this from happening: OneDrive, Steam, WhatPulse, puush, and f.lux. I have power options set to activate ...
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0answers
23 views

Laptop runs on battery but not running or charging from power adapter

I have a Lenovo Y470 on the bench. It runs off the battery till dead, has no power LED but power is present at mainboard from charger. So here are the existing conditions: Charger is good 19 volts ...
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1answer
106 views

Chance of data recovery from an unreadable microSD card

I have sent my dead microSD card to a data recovery company, but it could not help me. The following is the diagnosis by the company. Can the existing technology help rescue my data? ...
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1answer
13 views

Laptop cuts from external power when using too much energy

I have Acer Aspire 7750G and I've had this problem for some time now. I had problems with my display, it was going white for some reason. When I got it back from a repair shop, they said it was a ...
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0answers
56 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 ...
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5answers
2k 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
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1answer
61 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 ...
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33 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 ...
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1answer
55 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 ...
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3answers
31 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 ...
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0answers
27 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 ...
64
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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 ...
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2answers
59 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 ...
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4answers
378 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 ...
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18 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 ...
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2answers
58 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 ...
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0answers
45 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 ...
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1answer
145 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 ...
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0answers
30 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 ...
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1answer
43 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
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2answers
53 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 ...
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1answer
33 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 ...
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1answer
1k 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 ...
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2answers
41 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. ...
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2answers
45 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).
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0answers
44 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 ...