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

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13 views

Reducing idle power usage of DDR3 SDRAM

I'd like to reduce the idle power consumption of my computer, with the goal of keeping it always on without a large impact on my energy bill (energy is quite expensive over here.) Using HWMonitor I ...
0
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0answers
7 views

Asus 501JW computer wont start

I have an ASUS ROG 501JW, I put it to sleep and after trying to wake it up, the ASUStek application said it was erasing everything from the flash drive, panicking at the imminent loss of information, ...
0
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0answers
31 views

Determine which component failed on a motherboard

Laptop powers up from the battery but it does not from the charger and it doesn't charge the battery either. I have measured voltages on power circuit components (see in the attached image). ...
-1
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0answers
13 views

Power Issue- Not charging

I have an Acer Aspire V5-571 that is not registering the charger is plugged in. The ac adapter is in perfect known working condition. I have replaced the power jack thinking that was the problem, to ...
-1
votes
1answer
23 views

Is it possible to make a laptop behave as if it is working on battery?

Is it possible to make a laptop behave as if it is working on battery, while in fact it would be working on AC power? I have some HW problem with my laptop. It reboots for unknown reason every time ...
0
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0answers
13 views

U2442 laptop no power

I have a gigabyte U2442V that does not power up when I press power button... No LEDs are on. For some reason before its death I had to keep doing static discharges to make it work... A while after ...
-5
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0answers
23 views

solar system is really free? [closed]

one of my friend said he has solar system on the roof of his house and it is free installation and no payment on the system. Just pay set amount monthly to solar company. I did not believe. Is there ...
0
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0answers
14 views

How can I fix my pc after power failure during windows updates?

I was executing windows updates on my pc. The power failure was caused by the main motherboard power connector. A prong on this connector was bent enough that it was wedged into the motherboard and ...
-1
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1answer
33 views

Does an external hard drive draw more current writing or deleting files?

I have an external hard drive that is powered off of the usb connection to my Raspberry Pi. I use it for Time Machine back ups so it is almost always writing data to the external hard drive. However, ...
0
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0answers
20 views

Restore open applications and files after a manual restart

Sometimes when I log in to my pc in the morning it has restarted (possibly to power cut or updates?) and all my applications such as SQL Management Studio, Visual Studio(s) etc re-open any queries, ...
2
votes
1answer
26 views

Surge Protecter's Grounded Light Turning Off

I've got a new PC setup in a new apartment (built before 1980s), however the surge protector I have is doing some funny things. Any help would be appreciated. When I plug the surge protector into a ...
0
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0answers
23 views

How do I turn off that annoying sound when power is connected on a Xperia Z3 Compact? [migrated]

Is it possible to turn off that annoying sound when power is connected? I have got the answer from Sony Support that this is a "feature".
0
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0answers
30 views

Computer power supply fault

This is my first post to the site; it's been a great resource to me in both my professional and personal lives. It's about time I registered! So I went to boot up my desktop this morning and nothing ...
0
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1answer
26 views

Overloaded UPS, might it have damaged connected hardware?

I have an APC Back-UPS ES 400, and during a brief power failure (less than a minute), its buzzer sounded continuously. Looking up the manual, this apparently indicates an overload. It's rated to 240W, ...
1
vote
0answers
18 views

PC Won't Sustain Power

I've been using this system almost every day for the past 7 months. It has worked completely fine with no indication of error at all, but now it will not power on. Whether I use the casr button, the ...
0
votes
2answers
60 views

PC reboot at boot time [closed]

My PC keep rebooting every time I try to boot on my HDD. No BSOD, nothing. It just shut then reboot. I can go into bios and change setting, restore default setting or whatever. Nothing work. I have ...
1
vote
1answer
59 views

I'm in the US and computer only works when power supply is in 230V position. How do I diagnose this?

So, I replaced a computer PSU about six months ago. And, the computer power down intermittently. I've found: it's not over heating. Monitor shows it running cool. it's not graphics related. ...
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votes
0answers
25 views

Dell Computer Power Supply

i have a damaged DEll power supply with 8 pin i bought an otherone with 24 pin and want to creat the 8pin the problem just one cable 12 Volt Standby 1.67A ,on dell but NOT present on ATX there just ...
4
votes
2answers
35 views

Does an INTERNAL USB hub affect performance?

I searched a little bit on the subject, but I couldn't find any clear answers, so I'm asking this question: Will the performance of a USB hub connected directly to the motherboard be shared between ...
1
vote
0answers
40 views

Power supply needed? can I use the same size because old one is near end of life or do I need a larger one [closed]

Symptoms, my computer when it gets going the power will just cut, the power indicator stays lit but everything else dies, all the fans, the screens go dead it does not respond on the network (ssh ...
0
votes
0answers
17 views

How to reduce number of wakeups/seconds due to timers?

I'm trying to reduce power consumption on one of my server. The machine is idle a lot of the time. I have monitored the number of wakeups/seconds with powertop and I see something strange: Summary: ...
2
votes
2answers
40 views

Is it not unsafe for a laptop to hibernate/suspend while an SD card is mounted?

I have been witnessing for years my Dell laptop freezes as it resumes from hibernating while an SD card is inserted in the slot and mounted. It of course took me some time to figure that out, but I ...
0
votes
1answer
58 views

How to know how much electric power a laptop is consuming?

On a laptop charger adapter it is written '65 Watt'. When I am using that laptop plugged into an AC socket, does it mean that it consumes 65 watt per second? I think it actually depends on usage. ...
1
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2answers
84 views

How many HDD's off 1 Molex? PICOPSU

First question here. I saw some posts about powering 2 HDD's from one molex, but I want to power 3-4 drives. I want to use a single molex and use splitters for the rest of the drives. Below is an ...
0
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1answer
66 views

ALFA AWUS036NH TX power vs USB current usage

I have ALFA AWUS036NH network adapter on raspberry pi model 2B running the latest raspbian. ALFA AWUS036NH should be capable of delivering up to 2W of power according to specs. Following some ...
0
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0answers
60 views

Battery does not resume charging after power interruption, if brand new HP Envy notebook is powered off

I got this laptop just yesterday, and I have a weird problem. Configuration of laptop: CPU: Intel Core i7 5500U @ 2.4GHz (Turbo 3.0 GHz). CPU: Nvidia GeForce GTX 850M (4GB dedicated). RAM: 8GB ...
1
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1answer
18 views

wireless router power adapter replacement 0.5a vs 0.6a

i have a wireless router with no power adapter, it needs a 9 volts 0.6 amperes adapter but i only have 9 volts 0.5 amperes power adapter. Will 9 volts 0.5 amperes power adapter damage my wireless ...
0
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0answers
24 views

ASUS monitor turns off, replacing the power cord works for a while then it happens again

My ASUS monitor is turning off a couple of times a day and is unable to be turned back on. I discovered that replacing the power cord allows it to turn on again, and in fact if I just plug in another ...
0
votes
0answers
12 views

Power plan switching brokes

I have ASUS U36S notebook and sometimes everything works fine. But sometimes power plan switching stop working. So for example CPU speed fixes on 34% of normal and I can't change it. This can be ...
1
vote
2answers
50 views

Acer Aspire V7 - Power Button and Lid Closed

I want to use my laptop with the lid closed with external screen, keyboard and mouse. I would like to turn on or take out of sleep/hibernation but the machine not allow this as long as the lid is ...
1
vote
2answers
50 views

How well is computer hardware protected from sudden power loss? [closed]

I always wondered how well the computer components can handle sudden power outages due to janitor accidentally pulling the power cord, whole city block power outage or power generator failure. Are ...
2
votes
1answer
43 views

How to put Windows Server into something like “Standby mode” so I can safely pull the plug off of it?

I have an interesting problem - we are going to test our UPS backup system by pulling the plug in our server room for a short time. Ideally the UPS will kick in and nothing interesting will happen, ...
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votes
1answer
47 views

should I remove an old laptop battery to save energy?

Does the old battery of an old laptop use a lot of energy when the laptop is connected to AC? Does the power supply waste electricity trying to continually charge an old battery? If I remove the ...
-1
votes
3answers
50 views

Is it ok if I charge my IPad with the power adapter that I use for my Samsung Tablet?

My iPad version details are as follows: Model A1460 Complies with the Canadian ICES-003 Class B specifications FCC ID: BCGA1460 and IC: 579C-A1460 Serial: DMPKF3F4F18Y There is something wrong ...
0
votes
1answer
48 views

Windows Power Options - Turn off the display - HDMI not saving energy

I recently purchased a BenQ GL2760H Monitor which has both HDMI/VGA/DVI inputs. I have a Dell Desktop with Window 7 which has a built-in Intel graphics card with just HDMI and VGA outputs. I also ...
0
votes
1answer
64 views

How transmit power affects power consumption of Wi-Fi router?

I wonder how Transmit Power affects power consumption and heating of my home wireless router. Below you can see a screenshot from router control panel. I can easily set it to 50% and on Windows 8 ...
1
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1answer
28 views

How to format the size of multiple link images in a power point simultaneous (2007)?

I've a powerpoint with one link image on each slide. I must update these images regularly but when I do, the size format of each link image changes. Can someone tell me, without using a macro, a ...
-1
votes
1answer
86 views

USB flash drive disconnecting and reconnecting continuously [closed]

I have almost the exact same issue as described here with my flash drive, but on Windows 7. My flash drive disconnects and reconnects continuously every few seconds, on the USB 2.0 ports, BUT on my ...
0
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1answer
41 views

Can I Swap Out Dell Desktop Power Cable

I accidentally stepped on my desktop power cable on my Dell XPS desktop. The warning on the insert (not the manual) said to replace it if damaged. Can I use the power cable from my old desktop ...
0
votes
1answer
34 views

Intel Broadwell Power Consumption and Clock Speed

I'm configuring a new MacBook Pro 15″ 2015 and wanted to know if the processor speed affects the battery life (power consumption) assuming that the work load is identical? 2.5GHz Quad-core Intel Core ...
0
votes
1answer
84 views

Lenovo Yoga Unable to Power On

So I was watching some YouTube videos earlier and my computer suddenly shut off, similarly to what you would expect if it had overheated. I don't expect that it did overheat: I wasn't actively ...
3
votes
1answer
47 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
23 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
194 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 ...
10
votes
2answers
588 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
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1answer
23 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
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1answer
43 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
36 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
2answers
70 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
22 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 ...