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

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10 views

Connecting an LCD display to msp430 launchpad?

So im trying to give my lcd display (Lumex 1602) 5v. Im trying to use the test pins on my msp430 launchpad TP1 and TP3. On the LCD pin 1 is gnd and pin 2 is power. for the launchpad TP1 is power and ...
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0answers
11 views

PowerVault Model CSEH 001

What does it mean when the exclamation Mark is on and it displays the number 6? Any help? I tried to search on google for an answer but I cant find anything that actually helps me.
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3answers
70 views

Will my hard drives be harmed if I hold down the power button for 5 seconds? [duplicate]

Sometimes I face the problems with my video card, so the system freezes. Reset button is broken, so the only way is to hold down power button for 5 secs. Guess that this action differs from power ...
-2
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0answers
20 views

Dead Laptop battery/Worked fine via powerplug/ As of late it randomly shuts off..[Acer Aspire] [closed]

I have reformatted and installed windows 7 on an old Acer aspire 5737z that ran windows vista, but now it seems to randomly shut off.. it ran fine when the power cable was plugged in. Any ideas as ...
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0answers
15 views

Allowing computer to turn off USB hub to save power - how much power?

Should the computer be allowed to turn off the usb hub? I have seen a solution suggested for slow USB recognition - to prevent the computer from turning off the usb hub. But there's a reason for it ...
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2answers
52 views

Computer Randomly Powers Off. What's The Cause?

I upgraded my computer a month or two ago now and now every so often, my computer will randomly shutdown (and then restart after about 5 seconds). To clarify, it usually shuts down when coming out of ...
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1answer
19 views

StoreJet 25M3 USB 3.0 1TB beeping?

So my storejet started beeping just now, the beeps only occur when I supply power via the a USB port, and the beeping only lasts for about 5 seconds and after that the beeping is gone and it just sits ...
2
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1answer
50 views

Coffee-damage via USB?

EDIT - Turns out coffee got into the case through the top fan... dripped down the back of the motherboard... Ho hum.... This morning my cat decided to chase absolutely nothing across my desk. This ...
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1answer
43 views

PC restarts on power outtage despite having a UPS

Unfortunately where I live I do not have 24/7 electricity. My new PC rig which is considered to be a high-end(gaming) system is connected to a brand new APS/UPS that have these specs: DC-AC ...
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1answer
20 views

Windows 8.1: Keep remote monitors/displays off during RDP

In the mornings, I leave my user account logged into my Windows 8.1 Pro desktop. My monitors power off a few minutes before I leave my home. Later, I RDP to that PC using the same username.. which ...
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0answers
20 views

no power after resseting cmos?

My computer wouldn't let my usb keyboard work on boot and i could not access BIOS. So, i did what i usually do and remove the battery from the mobo and put it back again.At first, it would turn on but ...
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0answers
28 views

Put computer to sleep, leave for 2+ hours, come back and its shutdown and won't turn on

I built my computer maybe 5 months ago, and it has been running fine up until a couple of weeks ago when I had it in suspend, and then it decided to shutdown and wouldn't turn back on. So I tried ...
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2answers
103 views

Whats the difference in power usage between a ball mouse and a laser mouse?

What I'm interested in finding out is if a ball mouse uses less power than a laser mouse and if so, is it significant enough to warrant carrying a ball mouse with my Ubuntu laptop to save battery? If ...
2
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1answer
34 views

my power supply died dramatically; is it safe to simply replace it? [duplicate]

my power supply died last night rather spectacularly: blue sparks, popping sounds, a smell of burning plastic. the computer shut down, then tried to start itself up again, and sparked and popped some ...
3
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1answer
143 views

Are there any good reasons for halting system without cutting power?

Are there any good reasons to halt a system without switching off power to the hardware? I mean using the halt command without using the -p switch. I haven’t been able to find an answer on the ...
0
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1answer
16 views

What aspects of running modern videogames cause most of the power consumption on GPU's?

A 3D game has to render polygons, their textures, detect collisions etc. and current GPU's eat an enormous amount of power. Which aspect(s) eat the majority of the power used on a GPU when a typical ...
1
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1answer
40 views

Why does my Dell Inspiron 14R N4010 laptop automatically power off after 2 hours? [closed]

I am having an problem with automatic power off problem on my Dell Inspiron 14R N4010 laptop. When I power on my laptop it’s running only for only 2 hours and after that it automatically powers off ...
2
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0answers
24 views

Computer won't start/react while new gpu is plugged in

I just upgraded my computer and changed almost everything except for the case and psu (650W). My parts: ASUS ROG MAXIMUS VII HERO Intel Core i7-4790K Kingston SSDNow V300 240GB 2.5" OEM Corsair ...
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1answer
59 views

Why does laptop's battery drain only when I am playing Minecraft?

I got a new power supply/cord for my Asus N550JV-CN191H, after my old one tore. The new one works fine, and the power indicator (Ubuntu 14.04) shows that the battery is charging, except when I play ...
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0answers
27 views

Power issue, turned off once will not turn back on [closed]

I have had this computer for less than a year, but I built it. It is my first rig. The computer has been performing well-- very well in fact, but just earlier today I tried shutting it off from the ...
0
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1answer
24 views

Laptop turned off without charged

I have a Asus N55SF laptop, and always when I unplug my device from the charger it immediately shuts down - the battery decreases from 100% to 1% in few seconds. Perhaps the problem is with my i7 ...
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0answers
24 views

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
27 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 ...
0
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0answers
6 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: ...
0
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1answer
24 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
47 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 ...
0
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1answer
69 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
41 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 ...
0
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2answers
77 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 ...
1
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1answer
29 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
54 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
50 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
96 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 ...
0
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0answers
23 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 ...
0
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1answer
430 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
40 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 ...
0
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2answers
95 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 ...
0
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0answers
12 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 ...
0
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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
0
votes
0answers
68 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 ...
0
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1answer
40 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 ...
0
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1answer
195 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 ...
0
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0answers
27 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?
1
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0answers
37 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 ...
0
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1answer
870 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 ...
0
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0answers
33 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 ...
0
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1answer
155 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
15 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 ...
0
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0answers
85 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 ...