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

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16 views

How can I know max power output of a power supply in a LED tv?

I would like to integrate an Atom mb inside a 22 inch tv. It fits there, I will take heat into consideration, etc. The mb will use a 12v DC pico psu. As the TV power source already supplies a 12V ...
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1answer
44 views

USB ports not powered when laptop is off?

I just bought a brand new ASUS ROG Strix GL502VY and none of the USB ports charge my phone while the laptop is off asleep, as expected and advertised. I've googled the issue and can't find anything ...
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2answers
85 views
+50

Having a rough estimate of energy consumption of the computer.

I'm developing an app which needs to know about the energy consumption on computers (On windows). I realized the OS has no functionalities to support this directly, so my workaround is collecting info ...
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0answers
29 views

Can I put a desktop Core-i3 CPU in a laptop?

This is a mirror-image of this question: Can I put a laptop Core i7 CPU in a desktop? I would like to buy a laptop that I will use mostly at home and at the office. I need a laptop rather than a ...
4
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2answers
33 views

Implications of AC power failure on suspended Linux box

My Linux box will be automatically shut down by the attached UPS if it is running and the AC power fails. If I have the Linux box suspended and the AC power fails, I assume the UPS can not shut it ...
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0answers
11 views

LAPTOP ports(VGA/USB) leaking current

My laptop battery is dead so i run my laptop on AC power.Whenever i place my laptop on my lap, i feel stinging sensation from VGA port time to time.It seems that the VGA port/usb port are leaking ...
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0answers
27 views

External Battery Packs for gaming laptops/high power laptops

I have a Lenovo Y50-70 and I want to buy an external battery pack to charge it when I'm outside to extend the battery life, I want something like a full day charge (8 to 10 hours on would be fine, I ...
2
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2answers
351 views

Combining multiple cables to increase current? (laptop charger)

I'm looking to use a simple USB power bank as a portable charger for my laptop (just to get a little extra boost if the battery starts running low at an inopportune time). My plan is to use something ...
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1answer
27 views

Does disabling SSID broadcasting lower a wifi antenna's total power transmission?

Does disabling SSID broadcasting lower a wifi antenna's total power transmitted to the surrounding environment? If yes or no , I would be glad if someone could give me any reference or measurements: ...
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11answers
8k views

Laptop sometimes shuts down when out of power causing me to lose my unsaved files

Why does it do this? Most of the time my laptop just goes to sleep when it gets to 0% power. But sometimes it completely shuts down and I lose my unsaved files. Is this a problem with my laptop? The ...
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2answers
55 views

Is it safe to use the 5v/2A charger on a device with 1.5A max input [closed]

I have a 8000 MAH rechargeable lantern with power bank, the max input is 1.5A. Based on my recent research, this is what I am concluding, please confirm if my finding 1, 2 are correct. #3 is a ...
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0answers
8 views

View laptop power consumption without running it on battery

My laptop has a bad battery (lasts 20 - 30 minutes of normal use) but I need to see the max power consumption.I tried running Prime95 + Furmark on battery with power saving off (which took 50 watts ...
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0answers
22 views

Server is not responding and accessible

A long power cut happened and I have one server with a weird behavior. It's an HP DL145 G2 without warranty :/ Impossible to make work a vga port or any usb port, same with PS/2 port Impossible to ...
0
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1answer
45 views

Laptop Battery Draining While Plugged In

I have a relatively new (<1yr.) Dell Inspiron 15 laptop, which stays plugged in all the time. It's connected to a flatscreen monitor via HDMI & I keep the lid shut, so that screen's off. ...
1
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2answers
104 views

plugged in, not charging + ONLY runs on AC power

Laptop Model: Acer Aspire V5-473P Laptop Age: 22 months OS: Windows 10 (Upgraded 6 months ago) Problem Occurred: 5 months ago. Problem Description: Battery icon suddenly started showing "...
1
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1answer
31 views

Hard power-off as a requirement. How to safely enable?

I need to configure a Ubuntu 16.04 Linux system such that it withstands being hard powered-off regularly. For regular operation there's basically no writing going on, so a read-only file system might ...
0
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0answers
24 views

ASUS K52J Laptop not turning on, no indicator lights, charger is good, battery is good

I have an ASUS K52J. The charger is good (tested on a second identical laptop). The battery is good (ditto). When the charger is plugged into the laptop, the charging indicator light won't turn on (...
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1answer
32 views

Delay action for holding power button

So basically what happened is that sometimes accidentally press power button and it shuts down my PC. I went to Power options and pressed "Change what the power buttons do" and I can only change ...
3
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2answers
92 views

How to disable a USB port

For our RF Test Positioner System (illustrative example) I need to add a software-controlled fan. I would like to add a fan like this and simply turn off it's USB-power to turn the fan on & off. ...
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0answers
116 views

Windows 10 Will Not Shut Down

So I've got an issue that may sound like some of the others, but is actually different... I noticed a few days ago that my Windows 10 computer (updated from Win7 when 10 came out) will not shut down. ...
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0answers
14 views

HP Laptop not charging when working, doesn't start without battery - Windows 10

I have a HP laptop and yesterday I accidentally hit the laptop on the table. It was fine but when I charged it, it didn't charge at all. When it had 60% remains, the charging indicator showed white- ...
2
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1answer
37 views

Should i use an old PSU for my new PC?

I have an old Antec Quattro 850w power supply which already has 6 years. I used the PC that this PSU was installed like 2/3 hours every day for 6 years, mainly for gaming. I have a tight budget for ...
2
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1answer
64 views

Fixing a Cut PSU Wire

Whilst replacing my PSU I had to cut a few cable ties and accidentaly cut into the cable that connects the power button to the motherboard. Is it possible to solder iron the cables and it work? Or do ...
0
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1answer
104 views

Is it absolutely safe to turn off a computer in hybrid sleep mode?

In Windows 7 there's a hybrid sleep mode, in which the contents of memory is saved on disk and maintained in RAM as well. My question is can I be absolutely sure that nothing will go wrong when I cut ...
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0answers
19 views

how become an administrator in windows 10 if there is no administrator [duplicate]

Two or three days before I was administrator and it was running properly and my younger brother have another accounts , he was also administrator . I don't know what he did with this , when I heard ...
1
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1answer
32 views

Use TDP to size power supply wattage?

I'm running an A1SRi-2758F motherboard with an Octacore Intel Avoton CPU. The CPU is advertised as 20W TDP (Thermal Design Power.) Is my assumption correct that when the CPU generates 20W TDP, it the ...
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0answers
43 views

Windows 10 sleeps fine from menu, won't sleep from timeout

I have a power meter on a Windows 10 box. If I sleep from the menu or the power button, it drops down to about 3 watts. If I wait for a timeout (set at two minutes) it blanks the screen but keeps ...
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2answers
74 views

USB 3.0 port as 20v power supply [closed]

I'm looking for a way to get the stated 20V 5A out of an USB 3.0 port to power an amplifier. Found power supplies but no easy USB 3.0 cable to DC power jack/connector (20V). Does it exist either or ...
4
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2answers
132 views

What happens during a hard reset?

What exactly happens when you hold down the power button and perform a hard reset? Does it involve only hardware, in the sense that it shuts down power and everything crashes in its current state? ...
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0answers
16 views

Toshiba Satellite L850 power adapter

My Toshiba Satellite L850 power adapter gets extremely hot when I am using my laptop. I have noticed recently it seems to be getting worse. I make a point of unplugging it from the mains in case it ...
2
votes
2answers
39 views

How to measure a CPU overheating process when in Idle Mode?

Every time my PC is idle for an hour, I return to find the fan at maximum speed and the CPU at 51-52 degrees. It's Windows 7 on an 8150 octocore from AMD. The task manager shows that two of the cores ...
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0answers
40 views

Laptop charger voltage fluctuation

I had sent my laptop(Dell inspiron 5520) for repair as it wasn't getting charged at all. The battery was working fine though. The technicians at the service centre told me that the voltage ...
0
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0answers
33 views

Computer doesn't start unless case is opened

The power button just does nothing. The cord is fine, the outlet is fine, the power switch is on. Literally the only thing that fixes it is to: open the case pull the power supply out (without ...
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2answers
51 views

How to ground a laptop which does not have an earth pin

I have a laptop which does not have an earth pin on its plug. Because of this whenever I try to record audio using an external microphone there is a terrible buzzing sound. How can I fix this problem
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0answers
74 views

Windows 10 Professional: Doesn't Boot after Power Outage

I have a Windows 10 Pro tower (Lenovo ThinkServer 440) which has two SSD drives setup as Raid 1 (mirror). The computer is super fast and stable! Except when there is a power outage. And here is ...
0
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3answers
101 views

How does ethernet, coax, and telephone surge protection work?

So I'm planning on buying a UPS and I see that they have ports for protection of ethernet, coax, and telephone lines. I've read answers on these three questions, but none of them address this question....
0
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1answer
56 views

Lenovo laptop, Windows 10 not charging battery

I have a Lenovo G500s. It came with Windows 8.1 pre-installed with the battery working fine. I've installed Windows 10 on the laptop now and suddenly the battery is not recognized anymore. It says "0% ...
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0answers
54 views

How can I repair a power supply for a Apple's Power Mac G4?

This is an attempt to gather a reference page for anyone trying to replace a failing PSU from a Power Mac G4 with an equivalent ATX in the future. There are still a couple of pages -luckily- ...
0
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1answer
29 views

Powered Laptop Automatically Starting Up (Unintended)

I recently had a hardware failure and replaced my hard drive with a new one. Then having done a fresh install of Windows 8.1 (which then was upgraded to Windows 10). I'm having the same issue ...
0
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3answers
57 views

Can i split a microUSB to plug into the wall and computer

A USB has 2 power cables and 2 data ones afaik. If i were to split these and re solder them to make essentially a Y cable with one USB A for power and one for data, and then plug the power into wall ...
0
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0answers
57 views

auto power on after power loss after orderly shutdown

I configured my computer to auto power on after electricity power loss, through bios. But, I also want to auto power on my pc after electricity power loss after an orderly shutdown. for example if : ...
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0answers
26 views

Lenovo Y50 SSD upgrade - powering on issues

I recently upgrade my laptop (Lenovo Y50) from a 1TB HDD to an equivalent 1TB SSD from Samsung. I used EaseUS ToDo copying tool. When the computer boots up, everything works BEAUTIFULLY! Better than I ...
0
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1answer
30 views

Can I schedule a task when I hit power button on windows 8.1 tablet

I want to run a application before my windows tablet go to sleep/hibernate mode when I hit power button. Actually it should be triggered before entering sleep/hibernate mode but I'm ok if hooks power ...
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1answer
91 views

Is it safe to plug in a computer to a surge protector or a outlet? [closed]

I noticed that my old psu connector cable blew up beacuse of unplugging it correctly like pulling the connector off it was just the rubber peelling off and other rubbers with metal inside with ...
1
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2answers
76 views

Force laptop to use battery, not charger

I was wondering if it was possible to force a laptop running Windows to use its battery as the power source even when a charger is plugged in? If so, is it possible to switch between power sources ...
0
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1answer
40 views

Battery is shown as fully charged but does not feed the laptop

My laptop is a young Acer V11 Touch (V3-112P-P2E7). Yesterday I used it regularly on battery mode and I left it charging overnight. This morning's surprise is that the laptop only works when connected ...
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0answers
15 views

Turn off power to single USB port… Temporarily [duplicate]

I have a desktop running Windows 10. I have an led strip that is powered via USB. I would like to set this on a clock to turn on at a certain time and turn off at a certain time. Is it possible to ...
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1answer
33 views

Rename power plans in Windows 7?

Is there a reliable way to rename power plans in Windows 7? Creating new ones with a new names is not too hard, but some systems have dozens of power settings (including advanced settings) in each ...
0
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1answer
59 views

UPS suddenly restarting, what might be the cause?

Background My UPS has a backup of about 10 mins, thus, it's battery life is good. No problems detectable. My CPU, on the other hand, is also fine with no major hardware problems (as it looks so) ...
0
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1answer
41 views

Power supply or motherboard busted. How can I fix it quick?

A few days ago, my desktop PC just stopped turning on. Pressing the power switch elicits no response altogether. This is the sum total of the troubleshooting steps I've done: Super-newbily switched ...