Questions tagged [power]

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

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How to measure instantaneous CPU power dissipation? [duplicate]

I would like to accurately measure the (instantaneous) electrical power that my laptop's CPU is dissipating. I don't want to measure the power draw of the entire machine using electrical measurement ...
george's user avatar
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Laptop randomly powers off; this does not seem to be caused by any of the common causes

This started happening yesterday: My laptop will shut down at random. Immediately after shutting down, it becomes difficult to turn back on (i.e., it'll sometimes turn on for a second, then shut off ...
AmagicalFishy's user avatar
11 votes
3 answers
26k views

How can I detect the USB-C power delivery voltage?

I have an HP laptop which I charge with a USB-C charger through the USB-C port. I have no idea which power delivery (PD) version it has and if it's PD-compliant at all. However, as the charging works, ...
Suncatcher's user avatar
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ASUS motherboard delayed power on, is this normal?

My new ASUS Prime Z590-A motherboard has a delay when I press the chassis power on button. After I press it, I see some leds light in the mobo, but then a 3-4 sec delay follows, not even the PSU (at ...
g.pickardou's user avatar
3 votes
5 answers
12k views

Intel NUC5i7RYH won't boot, displays nothing

I'm looking at an Intel NUC, model NUC5i7RYH. It was working fine until yesterday, running Windows 10. After being left alone for the night - it has entered a state in which: nothing is sent to the ...
einpoklum's user avatar
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2 answers
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old computer hang on vga or usb

my old desktop computer start to hang up then restart when display card stressed or even used for video display or irregularly without stressing VGA, I noticed if mouse and keyboard removed "both ...
Hamed's user avatar
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Any idea what is going on with the power button here? When the computer is on, sometimes the button restarts it. Sometimes it keeps it off

ny idea what is going on with the power button here? I have made these two videos.. no need to watch them all start to finish.. https://www.youtube.com/watch?v=qcC84J5jCa0 (weirdpower) 5min https://...
barlop's user avatar
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PC building: Do you have to plug in the 4-pin CPU connector?

My motherboard has a single 4-pin power connector next to the CPU. My power supply has a 8-pin CPU power connector but not a 4 pin one. Instead of going out and buying a 8-to-4 pin CPU power adapter ...
Artichoke's user avatar
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Simulate closed laptop on windows

I have an automation script that needs to use my mouse. This means that my laptop's display is always on. I would like a way to turn off the laptop screen such that the simulated mouse movements will ...
John Hon's user avatar
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How to open an app when the power button is pressed

I want to run an app when I press the power button. So that e.g. Notepad will open when I press the power button on my PC instead of just sending a signal to shutdown. How do I do that? Are there any ...
Head's user avatar
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How can I minimize the use of power button on my laptop?

I want to save the power button on my Laptop by using it the minimum number of times. I have to use my laptop several times on most days. On some days, I don't use it all. The best strategy I have ...
paki eng's user avatar
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How can I stop my keyboard's Power button from shutting down my PC without disabling my laptop's Power button?

I've got a Logitech K270 keyboard which, as shown in the image below, has a little "power" button on top of the row of F keys (the next-to-last key to the right on the top row). This is part ...
Felipe D.'s user avatar
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Replace Desktop Power supply with Adapter based Power supply

I have a nice basic desktop with Pentium G4560 with a Crucial DDR4 RAM & Samsung EVO SSD. It worked nice and avg power consumption of ~45 Watt. The Power supply comes with a cabinet which costed ...
Moons's user avatar
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Power usage in Task Manager says "very high"

I am running the next parts: SMPS 750W Ryzen 9 3900x RTX 3060 24 inches led monitor These parts are connected to 600 VA ups and wherever I run a software I see my power usage shoot up very high and ...
Jayant Mehta's user avatar
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1 answer
720 views

Laptop screen turns black when I unplug from charger

My laptop is Asus A555LF. Its over 5 years old. For the later part of those years, every time the laptop goes in battery mode, or when I unplug the charger form the laptop, the screen gones blank. The ...
Zaris Othoka's user avatar
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How to know if the computer is getting enough power?

I have a UPS (650VA) and connected few devices including a laptop to it. I need to know is there a software or any tool or any way that I can know the devices are getting enough power? And also is ...
Dave's user avatar
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1 answer
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Why did my UPS works as expected if unplugged from wall, but seemingly failed when an actual power disruption occurred?

I've got several UPS units protecting my various devices. Today the room lights flickered for a minute, I heard a UPS "clicking" sound, and got notifications from my Mac that a few of my ...
mlevin77's user avatar
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58 views

ASUS Laptop Screen Hertz Issue

I currently have an issue with my ASUS laptop. When the power is unplugged the screen refresh rate drops down to 48 hertz from 120 hertz This caused the screen to glich and cut in half so that the ...
KyleStranger's user avatar
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2 answers
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PATA connectors looks like MOLEX in my power-supply-unit

I have installed this Corsair CV550 PSU in my computer. In the specification it says it has 2 PATA connector in single cable. Check the following image: As I don't have or need any PATA powered ...
AL-zami's user avatar
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Laptop only recognizes (Intel SSD 660p Series) NVMe disk when external monitors are disconnected

I'm facing this most strange issue with my laptop. My laptop has 3 video ports: 2 mini display port 1 hdmi port On which I connect 3 external monitors. When I turn on the computer, it boots ...
Lucas Bustamante's user avatar
1 vote
1 answer
359 views

Computer Restarts while on UPS

I am using a 650va ups (not a good brand) My previous pc had 400w psu and it worked fine. Now i am using a new pc (i5 10400f, gtx 1660ti oc, 550w 80bronze psu) Whenever the electricity goes off, trip ...
Dushan Sen's user avatar
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1 answer
1k views

Computer monitor shuts off temporarily when the window AC kicks on

When my window AC kicks on, one of my two monitors kicks off for a couple seconds. It's never the same monitor when it happens. I installed a very large UPS thinking it was power drops, but it doesn't ...
Steve's user avatar
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3 answers
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Unplug power cable of my monitor

Is it oké that I unplug my power cable of the monitor every night? Or is it bad for the monitor? Thanks
user1525482's user avatar
1 vote
3 answers
5k views

Can a Desktop Computer run off of a dc battery directly?

so I have my room setup to run off a dc battery, and the battery itself is charged via a solar panel. I currently use an inverter to power my pc setup but I would love to know if I can eliminate the ...
Nura's user avatar
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3 votes
1 answer
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How to prevent Windows 10 from immediately waking after shutdown or sleep?

After newly setting up Windows 10 on a new SSD, it always immediately wakes up again if I shut it down or send it to sleep. The only way to keep it off (aside from cutting the power supply) is to ...
Sten cal Dabran's user avatar
1 vote
1 answer
2k views

Can a 97W Macbook Pro charger be used to charge an 86W XPS 15"

I am moving over from a MacBook Pro 2019 to a dell XPS 15" and so will be selling my MacBook Pro and not sure if to sell it with my spare charger. Would I be able to use my spare 97W MacBook Pro ...
iProgram's user avatar
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1 answer
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Computer not starting due to humidity?

A while ago I've asked a question about my computer not starting when pressing the power button. There has been a new developement: I've noticed that my computer won't start when there's been heavy ...
user1785730's user avatar
0 votes
1 answer
664 views

Can't start desktop PC unless motherboard is plugged in to PSU with PSU on

A weird issue appeared on my desktop computer. After a few reboots via reset button in a row (was fiddling with bootable USB stick etc), PC refused to boot. Thought it was the PSU, but no. Then after ...
Alexander's user avatar
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My HP-Z440 Tower workstation does not power on

I have a weird issue. My HPZ440 workstation does not power on. When i hand it over for troubleshooting, the guy tells me that it doesn't have any problem and is working fine. Then it works for a day ...
Asad Hayat's user avatar
0 votes
1 answer
2k views

Lenovo Ideapad Flex 5 15IIL05 Won't Charge

Just over a year ago, I bought a Lenovo Ideapad Flex 5 15IIL05. Unfortunately, it has recently started having issues, possibly with the battery. First, several months ago it started randomly ...
Ben Simmons's user avatar
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0 answers
32 views

How do I keep my laptop on after closing it and then unplugging it?

Until the Windows 11 update, I had my power options set up so that my laptop would stay on when the lid was closed while it was plugged in. I could then unplug it and it would remain on, which I used ...
robbie's user avatar
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1 answer
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Laptop doesn't start if charger is not plugged in

I got an old Lenovo z50-70. It was mostly used with a charger as previous owner says. The issue is: it doesnt start if the charger is not plugged in. Whenever I try to start it without charger, it ...
EmptyPotato's user avatar
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0 answers
73 views

Old FreeNAS server shutdowns every day after being moved. Why?

This is probably something obvious, but I have an old HP machine that we've been using for 9 years as a file server (it uses FreeNAS 9.2). It's been working fine, but I recently moved it to another ...
daveslab's user avatar
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1 answer
123 views

Power Fluctuations in My Area and Restarting of the iMac

I live in a place with a lot of thunderstorms. Usually 3-5 times a month the power fluctuates restarting all my devices including iMac. Is there anyway I can protect my iMac and maybe some other ...
Mary Doe's user avatar
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1 answer
2k views

Do laptop chargers still consume electricity when the laptop is turned off (shut down) and the charger is plugged in [duplicate]

I tend to forget that I am charging my laptop when I turn it off and leave it overnight charging, even though it is turned off. I'm wondering, does it still consume electricity?
Michael Tejada's user avatar
1 vote
2 answers
3k views

UPS getting overload when PC is connected

I have a UPS with 600VA. When I connect it to my small laptop and a monitor, the total wattage amounting to 40W approximately (to the higher side), the ups on backup runs for 40-50 minutes. **But when ...
Robert's user avatar
  • 219
0 votes
1 answer
721 views

Laptop Hibernate every time switch to "not charging" because of wrecked battery (0% available)

Recently, my Asus laptop's battery wrecked: 2 days ago, my battery reached 79%, I thought the battery led indicator would turn from red to white soon, but then boom, battery turned to 0%, then I knew ...
123iamking's user avatar
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1 answer
503 views

SQL QUERY not picking up EXCEL date parameter not functional

I have an overnight data set that needs refreshing everyday. I used today's date with format =NOW() and tomorrow's date as =NOW()+1. The query is not pulling up the date from cell reference despite ...
Teodros IV's user avatar
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0 answers
45 views

Is it possible to disable Minimum Performance Percentage or Low Frequency Mode?

I have a Dell Inspiron 3551 going on 8 years old laptop. Just recently I accidentally caught the AC cord and damaged the tip of the cord as well as the socket, which resulted in not being able to move ...
reflexx's user avatar
1 vote
0 answers
511 views

Why are most laptops double-insulated while desktop PC's aren't?

As the title suggests, I'm curious why double insulation isn't considered an important factor when building a PC. I know most PSU's feature a third-prong for ground connection to avoid electrical ...
Kosho E's user avatar
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7 votes
4 answers
5k views

Can a 3.5" hard drive use USB-C as its only power input?

Can a 3.5" HDD be enclosed in an external USB-C enclosure with USB-C Power Delivery (PD) and have a USB-C cable from the computer as the only power source to avoid a second power cable? Does such ...
bolino's user avatar
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1 answer
994 views

Computer doesn't turn on when pressing the power button

It's not that it doesn't boot, but that the computer simply doesn't turn on. Absolutely nothing happens when I press the power button. Strangely enough, at some point it does turn on. This time it ...
user1785730's user avatar
0 votes
0 answers
165 views

Computer draws more watts when electricity in house isn't stable?

I have an i7 5960x (8-core, 16 threads) and two GTX 970s that are all running at full load 24/7. The total system power usage is typically around 450-550 watts when everything is under load. It has a ...
EllipticalInitial's user avatar
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0 answers
3k views

How many SATA Drives can be safely connected to SATA power connector?

SATA can handle up to 4.5A https://i.stack.imgur.com/pBoXr.jpg However a 3.5" drive typically uses power from both the +5V rail (for its circuit board) and +12V rail (for its motor) from the PSU (...
avg9957's user avatar
  • 599
0 votes
3 answers
3k views

How to autostart notebook on electric power is connected?

Have a arcade machine and a hp elitebook (8440p). How to start notebook automaticaly when plug the energy?, I want to avoid soldering the part of the power button to have an external button, I prefer ...
e-info128's user avatar
  • 162
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0 answers
300 views

Windows 10 shuts down/powers off randomly in sleep mode for no reason

My Windows 10 laptop (a Dell Inspiron 5491 2n1) shuts down randomly during sleep. It does not hibernate, nor perform a clean shutdown, it (seems to) simply power off. This also deletes all saved work. ...
Jackson Seven Delta's user avatar
0 votes
0 answers
511 views

Is It possible to use a 5V/3A power supply to only power a PD USB Type C Hub and not the laptop?

Situation: I require a powered USB hub because I need to expand a Thunderbolt/USB 3.0 Type C port to a few USB 3.0 Type A ports for a few portable hard drives. Problem: It is almost impossible to find ...
Timothy Wong's user avatar
1 vote
0 answers
112 views

Why is a USB-C meter not bi-directional? [closed]

A USB-C measures current only if plugged in one direction or otherwise reads 0A current. If I connect two meters in opposite direction, one meter measures current but the other measures 0A current. ...
KMC's user avatar
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0 votes
1 answer
386 views

Adding a power button to laptop for using as SBC

My laptop power button is included with the keyboard. And when I remove the keyboard from the keyboard port of motherboard, there is no way to start the laptop. The reason I want to remove keyboard is:...
Robert's user avatar
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0 votes
1 answer
2k views

External HDD Spins Down Every 30 secs - Can't find a solution to stop this from happening

My Seagate Expansion Desktop External HDD keeps spinning down after just 30 secs of inactivity. First off I know there are already a lot of posts on how to stop this from happening and believe me I ...
eome's user avatar
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