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Questions tagged [power]

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

3
votes
1answer
46 views

Can phones/tablets avoid charging from USB power?

I know that some laptops (e.g. Lenovo ThinkPad) have user-controllable software to disable battery charging even when AC power is plugged in. This feature takes precedence. When a typical mobile ...
2
votes
2answers
73 views

Shutdown-on-LAN capability

There is a technology, called WOL. Is the an opposite? Is it possible to shutdown a computer via LAN? I would expect small embedded linux in a NIC which was capable to long-press power off button. ...
-1
votes
1answer
47 views

Who is powering Wake-On-LAN capable card?

Who is powering Wake-On-LAN capable card? Is this PSU? If it is then, where are these wires on PSU, where I can take powed in power off mode? The focus is on details of power source. There is no ...
1
vote
1answer
60 views

CPU Does not run at full speed

I've been experiencing a problem with my processor's speed lately. The CPU is running 797MHz, instead of it's full performance. In the past, it's been running well, until yesterday when it suddenly ...
0
votes
0answers
45 views

PC turns on in silence mode after shut down [closed]

I have problem with my old PC, it turns on after shut down and it's not related to operating system, because it is happen even after not operating system shut down. I want also add: Computer ...
0
votes
0answers
23 views

Is it okay if the Power LED to flash once while switching on UPS?

My CPUs front panel power LED is flashing once after I powered on the UPS. A 'TUCK' sound is also coming from my speakers. Is that normal or is there any issue with my motherboard?
0
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0answers
26 views

Roughly every week, computer blackscreens and won't turn off

I've encountered probably the most annoying issue possible for someone trying to diagnose it. Roughly every week, my computer suddenly blackscreens (no signal to monitors) while staying powered and ...
0
votes
1answer
15 views

Is there a name for this kind of power cable?

I really like these PC power cables with the flat, side-by-side wire instead of the fat round ones you usually see. I can't seem to find them on Mouser, etc when searching for "flat". Do they have a ...
0
votes
2answers
74 views

Voltage Stabilizer and USB Hub

I need to use a voltage stabilizer to secure my USB Hub (Anker PowerPort 6), but the stabilizer is slightly underpowered. It is rated at 1.3A, 300W (230V). My Anker has input requirements of 1.4A (...
2
votes
1answer
42 views

External SSD not working with USB C to A cable

I have a cheap Sabrent SATA III to USB 3.0 SSD enclosure (EC-UASP, 2.5-Inch SATA to USB 3.0 Tool-free External Hard Drive Enclosure) that I often use with an equally cheap SSD for some extra storage. ...
-2
votes
1answer
22 views

GTX 1050 and GTX 1050 Ti-based cards power socket?

Some graphics card have a power socket in addition to drawing power from the PCIe bus. Is this the case for nVIDIA GTX 1050 and GTX 1050 Ti-based cards? That is, do No vendors' 1050 and 1050 Ti cards ...
0
votes
1answer
37 views

I gave 12V to my USB port on my laptop G50 70 i3 4th gen and now it's not working [closed]

I built a DIY cooler station for my laptop laptop which features both USB powered as well as 12V - 20V DC powered jack. I knew from the start that I that it would be possible to accidentally power ...
0
votes
0answers
12 views

What can cause a PC to power back on after being suspended?

I have a W10 (latest version) desktop PC. The first time I suspend it after booting, it stays off. If I then wake the PC, work some more, and suspend it again, the PC does go into sleep mode but then ...
0
votes
2answers
55 views

Computer doesn't seem to boot

A while back I bought a new computer. The old one was catching dust in the attic, but about a week ago, I saw it and decided to use it as a NAS, Network-Attached Storage. I cleared it of dust, ...
0
votes
5answers
462 views

How to fix the “Unknown USB device needs more power than the Port can Supply” error?

There's a message popping up saying: Unknown USB device needs more power than the Port can Supply. What do I have to do? What's wrong?
0
votes
1answer
38 views

Power state continually swaps between charging and discharging

When connected to AC power, my Lenovo T440s (2014) intermittently switches from "charging" to "discharging", and very quickly back to "charging". A full cycle takes just a few seconds (anywhere from ...
0
votes
0answers
21 views

How to properly ground dual PSUs for powering extra hard drives?

My project: I'm trying to build a small storage server with some old hardware I have lying around. The motherboard I am using has 4 SATA and 1 IDE connector, all of which I will be using to connect ...
1
vote
0answers
49 views

Can I leave my computer turned off for several years?

I'm planning to work abroad for several years and I can't bring my trusty PC along. I'm gonna buy a laptop and I'll possibly only come back home after 5 years. So my question is: Is it OK to leave my ...
0
votes
0answers
61 views

Random Hardware Anomalies after accidental reverse polarity

Good afternoon everyone, I have a bit of a weird question for you. About a month ago, I purchased a used Mac Pro 1,1 (2006). I proceeded to slap a GTX 1050ti in it, install windows and everything is ...
0
votes
2answers
154 views

Can I power a PoE device from my laptop?

Sorry, this PoE technology baffles me a bit. I have a lightweight router that can be powered over ethernet; is there a way of providing the power (and ethernet connection between the router and the ...
0
votes
1answer
15 views

Does Acer have any protection on its chargers?

I was just wondering if Acer or any other laptop charger had some sort of safety to shut off when extremely hot, because if not, then I would definitely consider bringing this charger to the repair ...
-3
votes
1answer
98 views

How does Windows schedule power on's and automatic updates at night?

What technology does it use? Does it have to be connected to the internet so Microsoft can send a wake-on-lan package? I don't think so. Does it somehow schedule it in the motherboard and wake after ...
0
votes
0answers
25 views

ASUS Motherboard has a power switch issue

I had a USB overcurrent issue and in the process of unplugging that I unplugged the he adapter for the turn on switch, since it was a usb in the front near the power button. I plugged that power back ...
0
votes
0answers
23 views

pc won't wake up from sleep mode - power button wont work

I got new AMD Ryzen 2700 and Asus TUF-X470 mobo. I swapped windows HD from my old system i7. Windows works fine however when I try to use sleep mode it goes to sleep permanently. Only resetting CMOS ...
0
votes
3answers
195 views

What is killing my power adapters? [closed]

Hardware I have two Acer S230HL's and an ASUS PG278Q (hooked up to a custom PC build). Background 3 months ago on an exceptionally hot day, the power to the house flickered off and immediately back ...
0
votes
1answer
47 views

Laptop won't boot and charger won't work

Last night when I went to shut down my laptop, only the "install updates then shutdown" option was available and the usual "shut down" option wasn't there. I decided to just go ahead and choose it, ...
0
votes
0answers
20 views

How to disable a virtualbox nic when not in use to stop it sucking power?

I'm using powertop to see what's eating battery. A massive chunk is apparently going on nic:vboxnet0 which I do need when I fire up my VMs, but when they're not in action, I don't need to be spending ...
0
votes
0answers
92 views

Determine whether charger, laptop, or battery is broken

Laptop will not charge. What's happened up to this point: Battery stopped being detected by the computer. Charger was still working at this point; I could use the computer without the battery if it's ...
0
votes
1answer
78 views

Supply extra power to laptop's SATA drive?

I'd like to convert my laptop into a media center. I have an 8TiB HDD that I could plug into it using a SATA extension cable, but I expect that laptop won't have enough power to keep it up. Is there a ...
0
votes
0answers
40 views

Powerline DHP-P308AV - Not working?

A storm tripped our breaker five times last night and caused one of the adapters to not 'power on'. The problem is that the power is in fact working, and the device is actually getting power from the ...
2
votes
3answers
672 views

Why does my macbook give a slight tingling sensation when it is charging and what could i,we or Apple do about it? [duplicate]

I have been facing this problem since the time of purchase. I think the shocks go away once it's fully charged. I experience shocks regardless of whether I sit directly on the tiled floor at my ...
0
votes
2answers
104 views

Can you use USB-C in parallel to provide more power?

I am currently looking at eGPUs for my laptop (HP Spectre x360 15"). Because the standard power brick is rated for 150W, the USB-C standard would only provide 2/3 of the required power, so even an ...
0
votes
1answer
64 views

Can non IP data formats over cat5 / 6 (eg. RS232 etc..) damage an IP switch?

Can various data formats can be run over a cat5 / 6 cable with RJ45 ends. These can include (not an exhaustive list) HDbaseT RS232 / RS485 (using an RJ45 to serial adaptor on the end) POE Cat6 (...
0
votes
0answers
36 views

PC will not turn on

this is a weird issue I have been having with my desktop PC. I live in an area where there are a lot of power outages(at least one per day), hence I use an UPS with my PC. Recently my PC won't turn on ...
0
votes
0answers
263 views

USB mouse&keyboard not waking PC from sleep despite Power Management settings

I have a Lenovo Thinkpad T580 running Windows 10, and I use it with USB-connected keyboard and mouse. I normally shut it down only by putting on Sleep mode, and would like to be able to wake it from ...
0
votes
0answers
144 views

Dell Inspiron 15 7559, DC Jack Broke a Week after Replacement

I've had a Dell Inspiron 15 7559 for around 2 years now. These laptops have a known issue where the housing starts to break apart around the DC jack (see here for example: https://www.amazon.com/gp/...
1
vote
1answer
22 views

Can i use a Lenovo power adapter with a groundless cord? Should I?

My Lenovo PSU has a C6 power cord inlet: I tried plugging in a C7 power cord but it doesn't fit: Should I assume that it was done on purpose because using a groundless power cord would be unsafe and/...
0
votes
1answer
21 views

What is the A/L/M switch for on a Top Power TOP-300XP power supply?

I can't seem to find any information on what the switch is used for: A is setting 1 L is setting 2 M is setting 3
0
votes
1answer
795 views

Laptop randomly shuts down after latest Windows 10 update

Since the latest update of Windows 10 my computer decides to randomly shut down after every couple of minutes. First the screen goes black, then the sounds stops and after quite a while the power also ...
0
votes
0answers
29 views

iPad connected to MacBook is beeping in one second interval (power icon blinking)

If i connect my iPad to MacBook Pro it is beeping in one second interval. Beep, beep, beep, beep and also the power icon in top right corner is disappearing, appearing etc. It does like that if i try ...
2
votes
0answers
29 views

Name of Power Cord Attachment Piece

I recently purchased an Acer laptop and the power cord uses a piece that is different than a Velcro strap to wrap the cord up. I can't figure out what the name of this piece is. I've included an image ...
0
votes
0answers
44 views

Power/Reset button not working after failing a CPU stress test

I overclocked my cpu and was stress testing it using a software. Then suddenly my monitor lost its signal. I thought this was another symptom of overclock failure and tried to hit Power/ Reset button. ...
2
votes
1answer
98 views

What happens to the hard drive's head on abrupt shut down?

Suppose my hard disk is up and running. Suddenly there is a power outage when the hard disk head was on top of some sector trying to read some very large portion of data(busy moving for the upcoming 2 ...
0
votes
0answers
16 views

Rebooting Home Modem (Arris) via script

I unplug and replug in my modem every day (just something I have always done); but I am tired of doing that. I am new to scripting and powershell/cmd, but am very interested. If you all could possibly ...
0
votes
0answers
23 views

External hard drive with too little power - corrupt data, damage drive, or just not work?

If an external platter-based hard drive has too little power via a USB port, will the result be: Corrupt data? Damage to hard drive? Damage to USB port / motherboard? The drive simply not working? A ...
5
votes
3answers
509 views

Will a single USB 3.0 port power two 2.5" hard drives?

Will a single USB 3.0 port have sufficient power (via a non-powered hub) to run two external 2.5" platter hard drives (the type that don't require an AC power adapter)? The hub is a Sabrent 4-Port ...
0
votes
1answer
68 views

Easily reproduced total loss of power in a handful of specific situations - ideas?

I've recently assembled a new desktop machine from mostly new parts, plus a handful of still-working parts from my old build. For the most part it's running great, HOWEVER - I have an odd power-...
0
votes
1answer
194 views

Battery ran out of charge suddenly and won't charge

I've dell inspiron 5547 laptop and it was working fine till last night i used it. I didn't shut it down as I usually do and just closed the lid to let it go to hibernate or sleep mode, battery was ...
2
votes
2answers
233 views

Is there a limit on how much more ampers can I supply for a laptop?

My laptop uses a charger outputting 6.4A with 19V (120W). This charger was a replacement for the old one, the specs were almost completely matching (19.5V and 6.15A on the old charger), everything ...
0
votes
2answers
186 views

Plugged in but discharging, why?

My Laptop says DC 19V, 2.37A, 45W The charger I am using is 19V,3.42A,65W What is the reason my laptop charging status says plugged in but discharging? I am using ASUS UX305CA model, is there ...