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

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2answers
20 views

Can dedicated video cards be deactivated in laptops? [on hold]

Let's say the computer has the integrated Intel HD Graphics 4600 thingy, and nVidia GeForce GTX 760M 2GB. What if I don't want the nVidia graphics, but I have to buy the computer because there isn't ...
0
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2answers
26 views

Does running a laptop without the battery cause it to consume more power?

If I am using a laptop without battery and running it on direct charging, does it consume more power or same as with battery?
0
votes
1answer
30 views

My laptop battery doesn't charge

my laptop battery is nearly dead (it lasts only 10 minutes), but the major problem is that MANY times (not all) when i put the charger, the system says that there is power but the battery is not ...
0
votes
1answer
18 views

just bought universal power supply, how adapt it to my laptop

i just bought an universal power charger but does not adapt to the right voltage. The original charger is 19.5 v and 6.15 a, and the charger i bought is 12/15/16/18/19/20/24 v and 4.5 a. What should i ...
0
votes
0answers
24 views

Power consumption of a computer pre-purchase

Searching for methods of calculating the power consumption of a system, I only ever find methods of testing it, i.e. when you already have the machine. The issue is that I want to buy a cheap server ...
1
vote
2answers
21 views

Is MicroUSB powerful enough to charge MiniUSB devices?

I have a few MiniUSB devices, living in a very MicroUSB-dominated world. It would be much more convenient for me to leave a MicroUSB charger plugged in all the time, and just throw on an adapter when ...
0
votes
1answer
19 views

Packard Bell iPower Desktop Won't boot

This computer has been working perfectly until ten minutes ago, no changes or anything done at all to it since it last booted perfectly with a clean shutdown. Now, when I go to start it up, the blue ...
0
votes
1answer
15 views

When I put my computer to sleep I can't turn it back on without me manually shutting it down and turning it back on

It is a Lenovo G510s Touch, and it is a very annoying issue. I tried going into the control panel and changing what the power button does, but that has not worked. I have no idea what the problem is. ...
-1
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0answers
33 views

Computer has been crashing randomly with no dumps

This has been happening for a long time, but I've finally narrowed it down to specific combinations of hardware. First, the specs: Intel Core 2 Quad Q6600 2.4Ghz ASUS P5QL-VM DO (ICH10) 6GB OCZ ...
1
vote
0answers
29 views

mild electric current on the table and case

I have a UPS to which the case, monitor, etc. are attached. The problem is that when I plug the case (SMPS) power supply cable into the UPS touching the case and the table (on which the computer is ...
0
votes
2answers
47 views

How to determine if it's a motherboard or CPU issue?

Note that I read the main suggested question and my situation is different, so that's why I'm asking again. I'll explain everything in detail (this will be a little long, but I'll make it as short ...
0
votes
1answer
46 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 ...
0
votes
4answers
48 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, ...
-1
votes
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 ...
0
votes
0answers
26 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 ...
1
vote
3answers
57 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 ...
1
vote
1answer
24 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 ...
1
vote
0answers
89 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 ...
0
votes
0answers
28 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 ...
0
votes
0answers
63 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, ...
0
votes
0answers
20 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 ...
12
votes
3answers
798 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 ...
0
votes
1answer
56 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 ...
0
votes
0answers
29 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 ...
0
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0answers
25 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.
0
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0answers
15 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 ...
0
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0answers
24 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
votes
1answer
42 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 ...
0
votes
0answers
20 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 ...
2
votes
2answers
57 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 ...
40
votes
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 ...
0
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0answers
32 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
213 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 ...
1
vote
1answer
57 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 ...
1
vote
1answer
82 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
votes
1answer
77 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 ...
1
vote
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 ...
0
votes
0answers
14 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
58 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
142 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 ...
0
votes
0answers
29 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
votes
0answers
74 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. ...
0
votes
2answers
71 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 ...
2
votes
0answers
72 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
179 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
votes
0answers
31 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
146 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
votes
2answers
836 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
230 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 ...