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

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3answers
42 views

Shutting Down or Hibernating Overnight?

This question is for the all important reason of winning a bet. Which of the following is more energy efficient? Leave a Windows 7 computer sleeping overnight Leave a Windows 7 computer hibernating ...
2
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0answers
64 views

Is it possible to combine fanless, flex-form and a power output more than 300 Watt in a ATX PSU? [closed]

For the construction of an embedded System I look for a fanless ATX Power Supply that is build in flex form-factor and has a power output more than 300 Watt. On the Internet I found a few power ...
1
vote
0answers
10 views

Cursor hangs for a second when turning off sound system from the powerstrip

I have a curios hardware issue that I'm worried about. I have my desktop plugged into a regular power strip without surge protection or on/off switches. In one of its plugs there's another power strip ...
0
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2answers
31 views

Does a graphics card need leeway power?

So I'm looking to buy a new graphics card that says it needs 150 watts to run, the AMD Radeon 270. I can get it the 150 watts, but does it need some extra power as leeway or will it be just fine on ...
0
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1answer
32 views

Visual Studio corrupted my Windows 7 after power failure, in the middle of installation

I was at the middle of Visual Studio 2012 installation that the power went off! after I turned my computer on, Windows 7 boots up with welcome screen and an empty dialog like the picture below: ...
0
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1answer
34 views

Does turning off the monitor drop GPU power consumption?

When I manually switch one of my monitors off in a dual monitor setup does the GPU drop power consumption and stop sending a signal to the monitor? Does it work the same way when Windows turns off ...
0
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1answer
32 views

What are the consequences of using a smaller power brick on a laptop?

I have found many similar questions, but no one fully satisfying. Please correct me if wrong, but from what I understand the Voltage of the power supply should match closely the specs, while the ...
-1
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0answers
24 views

Sony Vaio Laptop does not power up. Power goes to the motherboard

I am trying to fix my sister's laptop. It's an old Sony Vaio ( like 2006-7 ). 2 weeks ago I was cleaning it and after that it was working only on battery. I was told to change the DC jack, so I did, ...
0
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1answer
21 views

PC not going to sleep windows 7

PC not going to sleep windows 7... Please help me come from this issue. Tried many basic steps to resolve this. But some services are stopping the PC not to sleep mode. For ex : In my org, we have ...
0
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0answers
22 views

Laptop battery won't charge past 68% after dc jack replacement?

Sony Vaio FW41E laptop / Vista I experienced charging problems when the prongs on the original dc jack loosened. I have replaced the dc jack and cable, making sure I ordered a compatible part. ...
0
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1answer
54 views

Can you charge a tablet and use a USB device at the same time?

Most tablets only have a single Micro USB port that is used to charge the tablet, or can be used to plug in regular USB devices like a keyboard/mouse using USB OTG. I would like to charge/power my ...
0
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1answer
30 views

Lenovo W510 randomly shuts down, won't boot

Today I went to turn on my Lenovo w510 and it wouldn't stay on long enough to boot. I tried it plugged into AC power (with and without the battery) and on battery power alone. All attempts yielded the ...
0
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0answers
32 views

Randomly loosing power to all USB ports than forced to reboot

This is going on since about 2 months now. A wrong mouse move and everything stops. All USB ports loose power. My first thought was acceleration , or combo between Skype and Adobe Suite. Wrong. ...
0
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0answers
37 views

i can't turn on system power icon in win 8.1

The power icon in the system tray is missing. I have tried right clicking the taskbar then selecting properies and then 'turn system icons on or off' the power icon options are greyed out and set to ...
0
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1answer
33 views

Can a complete blackout damage a computer?

just last night a blackout occurred while I was watching a video on the web. I've got my monitor and desktop computer plugged into an extension cord and then into a power strip/surge protector. Both ...
0
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2answers
44 views

Can a power strip being turned off and on again damage a computer?

I have both my computer and monitor plugged into an extension cord and then into a power strip (I've checked, and both the extension cord and the strip can handle the load and have been handling it ...
0
votes
1answer
28 views

Toshiba satallite r830 won't start, only orange flashing power symbol.

My Satallite R830 won't turn on. The power symbol flashes orange 8 times then pauses and restarts. there are 6 quick flashes followed by a longer one on the 7th flash then another quick one. The ...
0
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0answers
32 views

Dell inspiron n4010 battery won't charge

I'm having a dell inspiron n4010 laptop. The battery was getting weak day by day and one day I used the battery to full of its capacity. From next day on wards the laptop won't power up with the ...
0
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0answers
48 views

Is there any way to “Wake on LAN” a MS Surface Pro 2?

I have a Microsoft Surface Pro 2 that is embedded in an exhibit where it is difficult to access the physical power button. The exhibit space is only open for 8 hours of the day and I would like to ...
2
votes
1answer
58 views

Multiple cable adapter setup not working - VGA to smartphone. All cables tested and work

Issue Pictured overhead projector setup does not work. #1 -> #2 -> #3 -> Phone. All cables are tested and work! The issue is the HDMI connection between cable #2 and #3. With all other cables, the ...
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1answer
22 views

What are the impact on underpowering my motherboard/graphic card?

I recently had to change my PSU and the one that was given to me has not enough power cables to fully plug every plug in the motherboard and the graphic card. It seems to work just fine though, and ...
0
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0answers
21 views

Computer can't boot

I have a 1 year old PC and the last weeks, when I press the ON button the PC doesn't power on ( Like I didn't press the ON button ). I have to plug and unplug a few times the power cord in order to ...
0
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0answers
4 views

LG Nexus 4 E960 red light of death [migrated]

I brought my LG Nexus 4 E960 from India when I came to study here in the US. The charger didn't work well (it charged on the USB mode when I plugged it with the help of an adapter), so I bought a new ...
0
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0answers
23 views

How to measure power consumption in Windows 8

I want to measure real time overall power consumption of my laptop and I would do it with a software. After some searchs on the web I found out that Microsoft developed Joulemeter, a software able to ...
0
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1answer
25 views

Using a line conditioner to improve network performance

I have been reading on many A/V forums that people use line conditioners to improve the quality of the video and sound in their entertainment systems. And this got me thinking. Would adding a line ...
0
votes
2answers
40 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
41 views

My laptop battery doesn't charge [on hold]

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
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1answer
25 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 ...
1
vote
2answers
36 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
23 views

Packard Bell iPower Desktop Won't boot [on hold]

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
19 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
31 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
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2answers
75 views

How to determine if it's a motherboard or CPU issue? [on hold]

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
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1answer
47 views

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

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
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4answers
55 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, ...
0
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0answers
44 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
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3answers
79 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
28 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
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0answers
210 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
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0answers
33 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
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0answers
72 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
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0answers
37 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
831 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
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1answer
92 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
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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
54 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
24 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 ...
1
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0answers
38 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
68 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
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0answers
26 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 ...