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

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1answer
32 views

What are some ways to save major amounts of power on Desktop Computer?

What are some ways to save major amounts of power on Desktop Computer? Also, I have a question about the Minimum and Maximum processor state. If I set both Minimum and Maximum processor state to 0 ...
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4answers
38 views

power button.Wont turn pc on or off

I have a custom made desktop which is 5 1/2 years old. The computer was working perfectly until I moved. After I set up the PC again, I couldn't consistently turn it on and off. When I did get it on, ...
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0answers
20 views

Computer shutdown, will not power back on

The first day with my new PC, and im already having a problem. Was playing World of Tanks on max settings when the PC shuts down automatically. I assumed it overheated because the top light started ...
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0answers
22 views

USB Root Hub power surge with weird SSD behavior

My new laptop seems to be having USB issues. It keeps telling me that there was a "Power surge on hub port" and that a device has "exceeded the power limits of its hub port." Also weird is that in ...
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2answers
28 views

Converting a computer PSU to a bench power supply

)I have read a number of articles dealing with the conversion process and think I can manage to get there if I am careful and take it step by step. However my starting point is a box of PSUs that I ...
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1answer
21 views

Is it safe to connect a 10amp cable to my laptop brick if it came with 7amp

The standard figure-8 section of my power cable is broken, and it's marked as 7amp/125volt. I haven't been able to find any others marked for 7amp, so would it be safe to connect a similarly shaped ...
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0answers
36 views

PicoPSU problems with BioStar A68N-5000

I build myself a low power NAS system and I'm trying to power it with a PicoPSU and an external brick power supply. When I turn on the power the case fan starts turning for a second and then stops ...
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0answers
25 views

Would intermittent contact with the service voltage and capacitors in a power supply (inrush current) damage a computer?

If I plugged my laptop AC Adapter power cable into a UPS, causing sparks to blast out (and being unable to insert it due to the UPS being seemingly not designed for this type of plug, for whatever ...
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0answers
60 views

Agghhh! UPS Back-Up, Laptop Charger, Sparks

Boy… ok. This is so frustrating! Ok so, I've been getting a whole lot of problems with the electrical grid here lately: spikes, surges, lows, brown-outs, all kinds of problems, it's terrible, ...
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0answers
17 views

Computer starts and shuts down. After pushing the power on, it functions normally

Enviroment: * I have a working room with a common power switch for all the room. Every time I leave the room I switch the power off. * In this room I have a Fujitsu Siemens computer running Windows ...
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3answers
784 views

Laptop Either Shows 100% or 0% Charge

I have a strange issue with my Compaq CQ 61 running Windows 2012 (server) and I have Googled for it really long and hard and also searched other questions here but in vain. I believe my problem is a ...
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1answer
44 views

Battery Meter in Windows 8.1 keeps showing “Balanced” a the top

I often use High Performance and Power Saver, but the "Balanced" power plan keeps staying at the top and I can't rearrange. How I can change what plans should be shown so I don't have to go to Power ...
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0answers
27 views

Why is my laptop downclocking when it is not connected to power?

I have a Sony Vaio VPCF22L1/E. Regardless of the OS I use (I have both Ubuntu 12.04 and Windows 8 installed (dual boot)), the CPU downclocks itself when the laptop is not connected to power. At ...
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0answers
21 views

Mac Keyboard Power Button Scan Code?

Does anyone know the scan code sent by the Mac keyboard power button? I would like to control the power on my Mac from an microcontroller.
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0answers
11 views

pulseaudio / snd_hda_intel power usage

On an idle system, the two items highest on the powertop list are pulseaudio and snd_hda_intel (>70 events/s each, twice as high as the next item). This is the case even when nothing is using the ...
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0answers
20 views

git corrupted on ubuntu vbox, power failure with proper shutdown

i use git on ubuntu headless server on virtualbox on my laptop. when i shut down the pc, i don't bother shutting down the virtualbox, i just shutdown the pc. it never was a problem. it was fine since ...
0
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1answer
32 views

Microsoft Surface Pro Earthing Issue

I have the original 128GB Microsoft Surface Pro. However, when I plug it in to charge, I get small electric shocks from the corners of the device. I have already tried different power supplies. Could ...
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0answers
17 views

PowerBook 1400cs/166 won't power on

I recently came into possession of an Apple PowerBook 1400cs/166. When I got it today, it was working, but I had to take it apart in order to repair some case damage. After putting it back together, I ...
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2answers
52 views

Dangers of using external power source with internal hard drive

Is it okay to connect a internal hard drive (IDE/SATA/SCSI) to an internal controller (e.g. on-board the motherboard) and supply the power via another power supply or an external unit like the one ...
39
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13answers
5k views

Is it safe to power on a motherboard outside of its case?

I have a new motherboard which needs a BIOS update to support a new CPU. Thankfully I have an old (compatible) CPU handy. My plan is to install the old CPU, update the BIOS, then install the new ...
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0answers
31 views

Computer shutdown when holding keys for too long

I'm using a Manjaro Linux with an XMonad desktop. I'm still not able to reproduce the exact conditions of the bug but very ofter when holding a key for very long, the keyboard will freeze (just that, ...
0
votes
1answer
85 views

Can't a USB hub power keyboard and mouse at same time?

I'm trying to use a Dell mouse and keyboard via a single USB port using the USB splitter hub, but the devices seem to misbehave. Just one of the devices work when I connect both. I figured out it's a ...
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1answer
51 views

Whats the name of the device on a laptop that turns the monitor on and off when the lid is opened or closed?

What's the name of the hardware device on a laptop that turns the monitor on and off when the lid is opened or closed? My dv9000 laptop screen won't come on due to this 'switch' and I want to replace ...
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1answer
67 views

Can Current Backflow from Powered Hub's Adapter & cause PC Damage?

Getting this short: Can current flow from a powered USB hub's power adapter (lying 10 Meter away) back to computer via usb port and cause damage to Computer components like mobo, etc? What should be ...
0
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1answer
50 views

Laptop shuts off unexpectedly while in motion

Recently I've been encountering a very annoying problem during my commute in which my laptop unexpectedly powers off. I am using a Dell Inspiron 15 with a touchscreen. The laptop is just a bit over a ...
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0answers
39 views

Laptop turning on when touched

I'm trying to help a friend fix their Toshiba Satellite A665 because its been shutting itself off at random times until it got so bad that it doesn't make it past the BIOS screen before shutting off ...
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0answers
13 views

HDD Power Controller with API?

I just saw a new advertisement from Asrock. It said they created a "revolutionary" feature that their motherboards let users turn on/off HDD power (software-controllable). But this is basically what I ...
0
votes
1answer
54 views

Gaming keyboard G265 not responsive and backlight keeps flashing

My new Genius G265 gaming keyboard is not responsive and keeps flashing the backlight. In Windows I hear repeating ding sounds as if I removed the keyboard and plugged it back in. If I manage to turn ...
2
votes
1answer
98 views

Power capabilities of USB 3.0 vs 2.0?

I'm currently buying some new USB micro cables for my Samsung Galaxy S5. It supports both USB 2.0 micro and USB 3.0 micro connectors. Will I see better charging times when using the USB 3.0 cable ...
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0answers
27 views

Safety of higher POE voltage

I recently got 2 TP-LINK 5.0 GHz radios, to extend my internet connection to an area, 100~150 meters away. It comes with an adapter, and a POE switch. I tested them on ground, everything worked ...
9
votes
6answers
2k views

USB backlit keyboard power consumption

Does someone know the power consumption of an USB backlit keyboard like the SteelSeries Apex? I'd like to connect it to a Keyboard/Mouse USB Switch that goes to PC by one USB 2.0 cable. The mouse I'm ...
0
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0answers
59 views

windows 8 - how to stop secondary hard drives from powering down when primary is SSD

I have windows 8 running on SSD. It keeps cycling off my secondary hard drive which is not SSD. When I go to power plan I am unable to change HARD DISK > TURN OFF HARD DISK AFTER > SETTING MINUTES. ...
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2answers
66 views

Laptop battery will not hold charge after spillage

I had a spillage on my laptop (white wine if you're interested). Thankfully the laptop seems to have survived however the battery no longer holds a charge. What makes this unique (from searching ...
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0answers
69 views

Why would my notebook only turn on after several attempts?

It was working perfectly fine until I changed it's Celeron processor for a Core 2 Duo today. Now it only turns on 1 out of 5 or 6 attempts. Sometimes at the 1st or 2nd attempt. It's pretty random by ...
3
votes
1answer
148 views

How to draw 12W DC output from PC motherboard/PSU/USB?

I recently bought a Dell AX510 Soundbar speaker that fits snugly under my monitor. However, my monitor, Dell IN2030M is a budget model, and while it does have the plastic grooves to fit the ...
0
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0answers
27 views

ATX PSU: Pin 9 reads a lower voltage when plugged into motherboard

I'm pretty confident that the PSU is bad in this computer, but I want to understand what my multimeter is telling me. With the PSU plugged into the wall only, the multimeter says that pin 9 is a ...
2
votes
2answers
126 views

Can using a under powered laptop charger make my notebook shut down under heavy load?

I have a XMG P501 gaming laptop based on Clevo P150HM models at the moment connected to an under powered laptop charger. It is shutting down when under heavy load (3dmark, some games in particular) ...
15
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2answers
831 views

Identify AC Power Cord with rotated pins

Is this AC power cord connector a standard one? The pins seems to be rotated 90 degrees. This ATX power supply unit (Silverstone ST1500) did not come with the cord and I am hoping to be able to get ...
0
votes
1answer
174 views

Show power icon in tray on desktop PC [duplicate]

I have many power plans in my desktop PC - one is optimized for downloading (PC doesn't sleep but turns the display off), one for reading, one for games and so on. But the problem is that I have no ...
0
votes
1answer
92 views

Can a laptop power adapter bought with a UK power cord be used with a US power cord?

I bought a Lenovo laptop here in the UK and am shipping it off to my girlfriend in the US. Can she use a standard US power lead for the lead that goes from the laptop power adapter to the wall outlet ...
0
votes
1answer
36 views

Aero failure and errors after power loss

After a recent power loss I experienced, I rebooted (more slowly than usual) to find that Windows Aero failed to load (a High Contrast theme was loaded similar to Windows Classic and Aero themes were ...
1
vote
1answer
138 views

-48VDC power required: How to make it work with 110VAC input

I recently bought a used NetOptics TP-GCU-48V network tap on eBay for use on my home net. This is one of their earlier models and has been discontinued for a number of years. They have two versions ...
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2answers
63 views

Do power adaptors automatically adjust current and voltage?

I purchased a new power adaptor (19.5 V, 3.33 A, 65 W) for my Compaq Presario v3000 laptop, as replacement for the old one (18.5, 3.5 A, 65 W). It is listed as compatible with my laptop model. Does ...
2
votes
1answer
229 views

Why has my Battery Icon stopped updating in Linux?

I noticed something funky happening over the past week. My battery icon stopped updating. For a more specific definition, here's the expected and current behavior in detail: Expected Behavior ...
0
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0answers
15 views

Allow monitor to turn off during youtube playback

I have a HTPC hooked up to my Plasma TV. I occasionally like to turn on a youtube playlist, minimize chrome, and listen. The video playback, even though it's minimized, keeps the screen from turning ...
0
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0answers
11 views

Debugging power on issue

First off I don't know if this is the correct fora, for this kind of question. My personal Acer Aspire 5745G has an issue, namely that it usually has issues powering on. The issue is that when the ...
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0answers
22 views

How to automatically turn off the monitor regardless of inactivity? (Windows XP) [duplicate]

I'm aware of the power options in windows. But I don't want it to switch off after I've been idle for some time. What I want it do is to switch off on its own at regular intervals (say, 20 mins), ...
22
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3answers
1k views

Detecting when a server is running on UPS battery

I have a home server (HP Proliant ML310 G4) that I bought from my employer a month or so ago. The server runs Debian Linux and I use it for just about everything. I can get away with doing this ...
0
votes
1answer
20 views

How to monitor power usage of a machine without unplugging it?

My APC ES 700 UPS keeps beeping but I don't know why. I'm wondering if I'm overloading it and I'm also curious to know how much power my various devices consume. I'm thinking of buying a power ...
0
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0answers
537 views

Kernel-power event ID 41 task category 63

I have been having problems recently with my Asus N53Sv laptop, it will randomly shut off even at high battery levels (I even bought a new battery thinking it was the problem) It even dies when I log ...