Electrical power is essential to the operation of any computer and any of its components or peripherals.
0
votes
0answers
8 views
Xfce 4 LCD brightness control granularity
In Xfce 4 (version 4.8 to be specific) is there a way to adjust the granularity of the on-screen brightness control that shows up when I press the appropriate hardware key on a laptop? The brightness ...
2
votes
1answer
29 views
PSU cannot provide enough power
I've semi-recently built a new Linux rig for A/V editing and the occasional gaming. On some games I've experienced consistent reboots with high graphics settings that, I believe, are due to PSU ...
4
votes
2answers
72 views
How to turn on computer via USB Keyboard [closed]
I have an interesting query, my cat can turn on my computer by walking/laying on my keyboard when it is powered off, but I cannot find a way to do this intentionally.
I have tried to google it, but I ...
0
votes
1answer
25 views
how to automate pc shutdown & power off?
How could I automate the nightly shutdown and power off of my computer at the mains. That is aiming to use zero electricity during the night.
Requirements
Can configure time you want shutdown ...
0
votes
0answers
23 views
Power-on button takes a long time to work after PSU is turned on
I have a four-year-old Dell Inspiron 530 desktop with onboard video and recently it started to show this weird behavior (sorry, it’s a long post…).
The computer is connected to a voltage regulator, ...
0
votes
0answers
12 views
What size UPS do I need? [duplicate]
Trying to figure out what size Uninterrupted Power Supply (UPS) I need to keep my machine on in the event of a power outage (or on long enough to save what I'm doing before shutting down).
Needs to ...
0
votes
2answers
35 views
USB hard drive with 2 connectors; can I plug one into the wall for power?
I've got a USB 2.0 hard drive enclosure which came with a cable with 2 plugs on it. I know that this is done so that it can draw more power if necessary.
If the hard drive can't draw enough power ...
0
votes
0answers
22 views
Tips, tricks or products to organize SATA data and power cables in a small ITX case [closed]
I recently purchased a Fractal Design Node 304.
As far as mini ITX cases go, it's fantastic. Probably one of the best mini cases I've ever dealt with. I've built computers now for about 15 years ...
2
votes
1answer
35 views
Power cycle on reboot?
I have two identical computers (same mobo, memory, and peripherals) both running Ubuntu 12.10. The only difference is one has an Intel Core i7-3770K and the other has an Intel Core i7-3770S. I have ...
1
vote
2answers
63 views
My Computer Doesn't Start Up
I'm using an Acer Aspire L320(Windows Vista) and have no idea what happened to it! It doesn't start up (no visual on my monitor at all) and although the power button LED light still comes on, the ...
0
votes
1answer
45 views
Laptop does not start anymore because of power issues
I had power issues with my laptop (HP Pavilion dv7 1040ef) for awhile (two dead accumutators, some shutdowns for no reason), but now my computer won't load anymore. I can still start it on ...
11
votes
5answers
718 views
Power consumption: SSD vs HDD
In questions like this one and in websites everywhere it's noted that SSDs use much less power than HDDs... usually citing ~2 W vs ~6 W for HDDs, my question (and sorry if its stupid just need to be ...
1
vote
1answer
58 views
AC Adapter burnt due to voltage fluctuation
The voltage in our area went high.
The laptop stopped working,the little bulb in the refrigerator stopped working as well as an AC.
When i touched the laptop i felt a current from the metal lining ...
0
votes
2answers
35 views
USB devices prevent computer to turn on
I have a dell optiplex 960. If I plug in 3 usb devices (keyboard, mouse, printer) all to 3 usb ports next to each other (there is a row of 4 and a row of 3 on the back of the computer), It will not ...
3
votes
2answers
55 views
Autonomous powered RAM units
We all know that RAM is alive only when it is supplied by power, because the data need to be refreshed every couple of milliseconds. My question is, if there are any RAM units for regular PC's that ...
0
votes
0answers
29 views
How to calcuate amount of electricity required for cooling x watts of equipment in DC?
I have a rack which totals 8000 watts, now based upon this number I want to calculate the amount of electricity that goes into cooling the heat dissipated from this rack?
Is there any calculation, I ...
0
votes
1answer
34 views
Kernel panic after power loss
I have some PC systems meant for exhibition use, that are switched off by power loss some times. The systems use a vanilla Lubuntu Linux from SATA attached IDE drives. Now quite frequently, the ...
1
vote
0answers
58 views
Why is my hardware switching on a smart power strip if the desktop is off?
I bought a smart power strip to manage my electricity usage at home. I have a large desktop machine that is my main computer during the times when I am at home. I have my main power supply hooked up ...
0
votes
1answer
54 views
How to calculate total / max electricity consumpton for a server / or hardware equipment.?
Consider I have in the cisco 2911-sec/k9 data sheet with following power values
Maximum Power with AC Power Supply (Watts) 210
With this given value how can one calculate total electricity ...
0
votes
2answers
47 views
cannot turn on hp mini 210
I trying to switch on my hp mini 210 laptop and nothing appear on the screen(black screen). I also cannot see the bios setup as usual. So what action should i take to make my laptop work again?
2
votes
2answers
93 views
dell inspirion 545 desktop will not power on. possible solutions?
for a few weeks now I've had an issue where I have to unplug the power lead for 30 seconds then plug it back in and hit the power button before the pc will turn on /come out of hibernation. Now this ...
0
votes
0answers
26 views
Hp pavilion dv600 low battery signal randomly with AC plugedin
Pavilion DVD 600 battery is low but I have been working it with its AC adaptor without any problem. Now, after some time, battery low warning comes on and the laptop shuts down even with AC plugged ...
0
votes
3answers
127 views
Hibernate or shutdown computer? When power breaks
My last computer had one of too many power breaks - the electricity popped, and eventually had my hard-drive corrupted (probably). After reading a few articles about hibernation, I'm yet to understand ...
0
votes
0answers
56 views
PC crashes with Power LED Blinking at 1 Second Interval
I have a "server" that recently has started crashing around once a week. I have yet to find a reason for the crashing but the nonrecoverable nature of the crash is unusual. The machine is standard ...
0
votes
0answers
41 views
Monitor power consumption of a USB port
I have a device attached to a Usb port and want to run some tests to see the power required for the device to function correctly. I wanted to know if there is any software which will tell me how much ...
0
votes
1answer
35 views
Pmset multiple repeating schedule pairs
Can the pmset bash command be used with more than one repeating action pair?
For example:
Wake or Power on at 13:00, Sleep at 17:00
and
Wake at 18:00, Shutdown at 20:00
If not, is there an ...
0
votes
1answer
34 views
Server Power Management
I am making a single ssh server, and unfortunately, my area suffers from frequent weather-related power outages. This is going to be a bit of a problem if I want to have a server running unless:
a) I ...
-1
votes
1answer
46 views
IBM ThinkCenter doesn't power up?
My old ThinkCenter M-8143 doesn't boot. When I press the power button nothing happens. It's a brand new power supply, so can't be an issue with the PSU.
*If I remove the 4-pin CPU power connector ...
1
vote
4answers
129 views
What is 80PLUS?
Looking at various power supplies I see some of them listed as 80PLUS with various metal combinations. What does the 80PLUS label represent and how more efficient are they compared to ones without the ...
0
votes
2answers
152 views
Dell laptop dies when unplugged but the battery appears fully charged
To expand on what I mean, I checked the voltages of each cell in the battery pack and they each read about 4.0v ea (6 green Li-ion cells in a 11.1v 53WH battery) and the total voltage reads 12.4v.
At ...
0
votes
1answer
65 views
Thinkpad X220 power manager ubuntu
I'm running xubuntu on a thinkpad x220, with a 9 cell battery and i'm only getting 7 hours with chromium running, browsing the web. Powertop says that i'm using around 11 Watts at this state. Are ...
-2
votes
1answer
58 views
Grounding and why charge leakage occurs [closed]
A tiny nugget of info is missing in my end-to-end picture of how grounding works and why it's important. When a voltage is applied in a circuit the electric current starts flowing (or the field ...
2
votes
2answers
72 views
Is there a differnce between removing the power source cable from the computer or removing it from the wall outlet?
Reading about computer related crimes and how law enforcement policies are lagging adjusting to the digital age, I came across this document which is a manual of sorts, recommendations for the first ...
3
votes
1answer
135 views
Do high-end video cards consume more power during regular PC usage?
For things like coding and web browsing, does a high-end GPU (NVIDIA GeForce GTX 660 Ti) consume more power than a low/mid-range GPU (NVIDIA GeForce 9800 GT)?
The reason I ask is because the 9800 ...
0
votes
1answer
40 views
HP Pavillion A6603W will not turn on when power button pressed [closed]
Why will my computer not turn on> I had shut down and unplugged my computer when away on a vacation.I am trying to turn the power on using the power button and it will not power up. I cannot find a ...
2
votes
0answers
95 views
Kernel Event ID 41. My system keeps shutting off during games
here's hoping you guys can help me. This is a homebuilt system I put together myself. This is the build (I got a 7870 instead of a 7850, though):
http://pcpartpicker.com/p/eZgE
This error has ...
1
vote
2answers
110 views
Computer shuts down after a few seconds in Windows (power issue?)
I built a computer for a friend about 3 years ago. A few days ago the computer crashed to bluescreen and then shut down. When booting the next time, there were artefacts all over the screen. The ...
1
vote
2answers
38 views
How to verify that a surge protector actually works?
I need surge protectors to prevent expensive equipment from exploding. Manufacturers of these devices obviously make a lot of fantastic claims about features and performance, but how can I trust them ...
2
votes
1answer
57 views
Computer Randomly Crashes to Black Screen, sometimes fails to post
my computer started crashing to a completely black display where it would try and restart immediately. First it was happening during a game only and i thought it was some memory leak within the game ...
0
votes
0answers
198 views
Asus P8H61-M LX won't power up after clearing RTC
I used to have problems with my new Asus P8H61-M LX motherboard: the keyboard wouldn't work properly, I could not boot in windows, it took 3-4 computer boots to get an image on my screen (using the ...
1
vote
1answer
55 views
Repeatedly wake up, perform task, hibernate for hardware troubleshooting
I'm currently trying to prove a hardware malfunction to the hardware vendor. The system occasionally performs a hard shutdown (like a power loss), with batteries fully loaded.
The problem seems to be ...
0
votes
1answer
469 views
dell optiplex 755 power button flashing orange
i have a Dell Optiplex 755 when i turn it on i just get a flashing orange light from the power button.
I know there is power going to the motherboard as there is an orange light that is on.
i have ...
2
votes
1answer
169 views
My computer doesn't start - it is stuck in a turn-on, turn-off loop
When pressing the power button, my computer starts making start-up noises, but after a few seconds it shuts down. Then, after 2-3 seconds, it automatically starts turning on again and a few seconds ...
1
vote
0answers
24 views
How do I change power settings on my laptop to hear audio while running on battery?
I have a Lenovo ThinkPad with Windows 7.
I can hear sound when my laptop is powered up on AC power. While on battery power I can not hear streaming media, such as YouTube.
I was informed that I ...
0
votes
0answers
53 views
Older Dell monitor takes many minutes to turn on
I have an older Dell 24" monitor that's been acting up about a year or so. I've Googled extensively but can't seem to find anyone having the same issue.
I have 3 monitors. I leave my desktop on at ...
0
votes
1answer
97 views
Do discrete GPUs auto turn off while not in use? [duplicate]
I am planning to buy a desktop PC with a discrete GPU. I will use a 1080p monitor connected via HDMI. My workflow requires the PC to be kept on with the monitor turned off for more than 10 hrs daily. ...
0
votes
0answers
70 views
Sony Vaio will not turn back on without reseating the battery
I have a Sony Vaio E Series laptop (SVE14112FXP). Whenever it is powered off, it will not turn back on unless it is unplugged and I remove and re-insert the battery. The power button no longer works ...
0
votes
0answers
37 views
The idle power changes after restarts
I have this odd behavior that the idle power is either high or low. E.g. sometimes it is 20 W and sometimes 10 W. It stays there until rebooted of suspend/rewake.
All parameters that I know of like ...
2
votes
2answers
54 views
Monitor with light switch controlled outlet, harmful?
I have a power outlet tied into one of my lightswitches. I currently have a lamp plugged into it, but was thinking about plugging my monitors into it as well so that I could easily turn them off when ...
2
votes
1answer
73 views
Fast and reliable reboot after power loss
What is the best way to harden a linux system to power cycling? I often came upon systems used in shops, public, exhibitions, by several people where no one is responsible for. Usually those systems ...
