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

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2
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1answer
22 views

Will a 800va UPS output 800va after 3 years of usage?

I have been using an apolo 800va UPS for three years for my desktop. During a power outage will the UPS supply 800va to my PC? When a UPS ages it will decrease the battery backup time but will the ...
0
votes
1answer
17 views

Finding Power Supply for laptop [duplicate]

I have a HP laptop that came with an 18.5V power supply. Is this power supply unique to the point I have to go back to HP to get one or can I get one from say Radio Shack?
2
votes
1answer
20 views

can i connect my usb powered speakers to my phone charger? [duplicate]

I have got a 2.0 USB powered speakers which are supposed to be connected to the PC USB port. But that port creates noise in the speakers and is not very convenient. I have a phone charger of output dc ...
9
votes
2answers
385 views

What happens when laptops reach 100% charge?

I have been reading alot of mixed views on how Lithium Ion batteries work when it comes to laptops. I have the new dell xps 15, with an intel i7 cpu, 16gb ram, and a 512gb ssd. Is it bad for the ...
0
votes
1answer
14 views

Automatic power on my server

I have a problem with electricity in my company (common cuts) how can I make my server (DELL POWEREDGE 2900) starts automatically when the electricity is restored and I'm not there
0
votes
1answer
20 views

Laptop goes to sleep when lid is closed and disconnected from power

I am trying to work with my computer (Macbook Pro) attached to an external monitor, while the lid is closed. I can work on it when the laptop is connected to power, but when I disconnect it from the ...
0
votes
1answer
33 views

PC powers down randomly

My PC powers down and freezes randomly when on windows 7. It works fine on linux. I tried to run memtest and it powered down during(at about 12 %, 0 errors reported till then). On linux mint it runs ...
3
votes
0answers
23 views

PC only turns on when it wants to

I think my PC is possessed; it only turns on when it wants to. ...Jokes aside, my PC is not turning on and the symptoms are very strange and, to some extent, apparently random. I need help ...
0
votes
0answers
6 views

Asus Vivo Mouse - Touch Pad Not Reacting After a Few Seconds

I'm having an Asus Vivo Mouse which combines a regular mouse with a touch pad. Anyway, everything works just fine. But when I position the mouse steady and only use the touchpad, it sometimes just ...
1
vote
0answers
12 views

HP Mini won't work with battery alone without an AC power

What to do with HP Mini netbook that doesn't work without AC adapter? Even if the battery is attached and with 80%-up power charged. I consider that maybe need replacement and I did with the working ...
-1
votes
1answer
26 views

Can i W PSU on 0660W UPSrun 60 [closed]

Is 600 watt Power supply takes more input voltage than 350 watt power supply?.
0
votes
2answers
34 views

Is it fine to run a dc motor through USB cable connected to my laptop?

I have a dc motor which needs more than 10V to run efficiently, so instead of running it on electric cells, I usually run it using my laptop's power. I connect a USB cable to my laptop and the other ...
0
votes
2answers
49 views

Computer not booting up after reconnecting to electricity

Recently I started having problems with a bit older PC (quadcore with 4gigs of ram). When I disconnect it from electricity for few minutes/hours for example when I want to clean it from dust or move ...
-2
votes
0answers
17 views

Which components to get for x54c? [on hold]

I have accidentally damaged my motherboard and power switch board while cleaning the computer fan. I want to purchase a used motherboard and power switch board of ebay. My MB has this number ...
0
votes
1answer
52 views

PC doesn't turn on on first try on the power button

Every morning when I try to turn on my computer, it doesn't boot. It will only boot after several tries on pushing the power button. The PSU is alright as it powers the other fans immediately. When ...
0
votes
1answer
19 views

Can the USB ports on a Lenovo Yoga 3 laptop stay powered when Ubuntu 15.04 suspends?

I can't find a BIOS setting to keep the USB ports powered on suspend. Wondering if Ubuntu can keep them alive? I just want them powered so some devices (phone) attached to the ports can carry on ...
0
votes
1answer
18 views

Identify last linux shutdown time

We have a server running RHEL 5. Sometimes the power cuts and the server is down (the UPS handles only 30 min). I want to be able to to identify the time of the shutdown, in an other term the last ...
0
votes
0answers
23 views

Diagnosing hardware issue/Laptop won't boot

My (discontinued) HP Pavillion Notebook won't turn on. I encountered this issue RIGHT after the cord connecting my ac adapter to the wall outlet was unplugged (not the plug in the wall, but the ...
22
votes
4answers
1k views

When do I need a pure sine wave UPS?

I would like to buy a rack UPS that would support all the IT related electronics in a SOHO room. This include switches, routers, PCs, servers, NAS. During my research I found out that there are ...
0
votes
0answers
21 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 ...
0
votes
0answers
15 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.
0
votes
3answers
76 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 ...
0
votes
0answers
20 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 ...
1
vote
2answers
56 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 ...
0
votes
1answer
20 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
votes
1answer
51 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 ...
0
votes
1answer
48 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 ...
1
vote
1answer
22 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 ...
1
vote
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 ...
1
vote
0answers
30 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 ...
2
votes
2answers
115 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
votes
1answer
37 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 ...
4
votes
1answer
160 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
votes
1answer
17 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
vote
1answer
46 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
votes
0answers
26 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 ...
1
vote
1answer
63 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 ...
1
vote
0answers
28 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
votes
1answer
30 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 ...
0
votes
0answers
26 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 ...
1
vote
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
votes
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
votes
1answer
35 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.
0
votes
1answer
49 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
votes
1answer
89 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 ...
0
votes
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 ...
0
votes
1answer
42 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
votes
2answers
103 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 SSD: 250GB Acer Nptity ...
1
vote
1answer
38 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 ...
1
vote
1answer
56 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 ...