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

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31 views

Can stripped metal on a power button ribbon be repaired?

I was struggling with a power button cable going into the motherboard (the clip was broken), and in the meantime I managed to strip the ribbon going into the motherboard. I reversed the cable and ...
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0answers
11 views

Asus S500C laptop does not power on

A friend gave me an Asus S500C SonicMaster laptop because it would not power on. Thought I could get to working, but I'm at a loss. Took a multimeter to the AC adapter and it shows the specified ...
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1answer
30 views

Laptop Power Button Won't Shut Down Stuck Installing Windows Updates

I have a Toshiba Tecra R950 laptop with Windows 7 64 bit. Last night it seemed stuck on the installing updates screen while shutting down. I let it run all night and it is still stuck. So I decided to ...
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0answers
10 views

per-vif tx power setting?

I am trying to change the tx power setting for my TP-Link TL-WN821N adapter for learning purposes. I tried this: iw reg set BO iwconfig wlan0 txpower 30 and this ifconfig wlan0 down ...
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0answers
24 views

Charge light on if display cable disconnected from motherboard

I have a HP DM4-1050ea laptop, which recently started to not turn on either with battery alone or AC alone (with and without battery). I cannot boot with battery alone because it's drained and don't ...
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1answer
19 views

Will multiple 12v rails “stack” to power a GPU that needs more than each individual rail?

I have a Rosewill Stallion 400 watt power supply, and it has two 12 volt rails: one with 13 amps and one with 14. Will this be enough to power a GTX 750 Ti, which requires 20 amps? The PSU has one ...
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1answer
38 views

max USB length for power supply

I know that normally usb 2.0 limit is 5m, but is there any difference how I use that cable? Can I simply extend cable longer than 5m if no data or audio transfer is required, just want to feed really ...
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30 views

Laptop battery full charged

I have a new battery pack for my acer aspire 4750 laptop, it hust a 2 weeks old, actually it is working pretty good. I use batterycare to check charge level, so while i am charging and it reached 80% ...
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2answers
33 views

Computer needs to “rest” after a power outage

My PC normally runs fine. After a power outage or a short-circuit, however, it can't be turned back on until some significant amount of time (>1 hour) passes. My case has LEDs that are on even when ...
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14 views

Restarting turns off monitor, but computer stays on

Since yesterday, my computer just couldn't complete a restart. I would click the Windows button > Power > Restart, and it'd go to the Restart screen. Wheel finishes spinning and the screen goes ...
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1answer
18 views

Computer stuck on bootloop

So i've had my computer for about 7 - 12 months now and its been working perfectly fine i have an i7, asus Maximus vii, 890w power supply sad, hard drive and gtx 780. Now the other day i was doing ...
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19 views

Dell Inspiron 15-5547 Shutting Down Immediately After Startup

I am working on servicing a friend's laptop, and I cannot find what the problem is. The reason that I started servicing the laptop was that he was having issues where the laptop would shut down ...
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1answer
18 views

Control Power To Multiple USB Devices

Problem I have multiple USB devices, (multiple power-only lights, a power & serial-data camera) that I need to control power to programmatically through a single USB port. Questions What ...
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0answers
74 views

Which saves more power, core parking or clock down-throttling? [closed]

(Context): Sometimes I leave my computer turned on for long periods while not really using it (to seed files over torrent, for instance). My CPU is an AMD FX-6350 cpu (6 cores, 3.9 GHz) which is kind ...
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1answer
55 views

Does the amount of free space on a HDD have an effect on power consumption?

I a couple of friends on Facebook have started spreading a message stating that if you delete 30 old E-Mails from your inbox it would save enough power to light a light bulb for 24 hours. They also ...
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0answers
7 views

Lenovo X201 Battery management INOP

Something is not working with the Lenovo Power Manager software/hardware on my X201T tablet. The computer always shuts down when I am on battery and still have 1.5-2 Hours left of battery life ...
1
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1answer
21 views

Can I put my 8x plug in a 4x slot (CPU powering)

Is that okay or will that damage my hardware? Because I just got a new power supply (corsair vs650) with a 8x plug but my motherboard (h81m-plus) only has a 4x plug Is this fine or am I out of ...
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0answers
17 views

Custom built computer won't turn on anymore?

I built this computer that has been acting quite strange for a while now. At first it would freeze up after 10-30 minutes of playing games (Both low end, and high end games). The only way to get it ...
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1answer
13 views

How can we know that our laptop model has capabiliy to protect overcharge baterry, and is it able to set preferences?

How to know our laptop model has ability to protect overcharge baterry, and is it menu to setup the preferences? Example this is my model I am still confused to read the spec, how to check this ...
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0answers
16 views

Power Outage: Corrupted vmdk image - VERR_VD_VMDK_INVALID_HEADER

I read a similar thread on this site Can I fix corrupted vmdk image? VERR_VD_VMDK_INVALID_HEADER but I need more assistance on the steps to try and make this repair. I have the exact problem that ...
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0answers
12 views

Ethernet doesn't work in Windows after power outage but just fine in Linux

This has happened several times. My PC is running dual boot (Windows 8.1 and LM 17.3). As mentioned above, if I boot Linux from local driver (or an USB stick), restart and back to Windows, it ...
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1answer
84 views

Black Screen while Gaming, But Sound still working

While gaming my 2 monitors go black with the no signal message and I hear the Windows disconnect sound like when you unplug an USB. The thing is that the sound of the game is still running and I am ...
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31 views

Computer Doesn't Always Turn on when Pressing Power Button

I have a desktop and my case's power button stopped working after a while. I reverted to using a small screw driver or paper clip to turn my computer on by touching the contacts on the motherboard ...
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1answer
49 views

Laptop PC switched off after plugging in USB 3 hard drive

I have a laptop which I built from components in 2004. The laptop is of course really old and some of the keys on the built in keyboard are wobbly/not working so I plug in an external keyboard. The ...
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3answers
45 views

Why upscale CPUs consumes more power even when idle?

A core i7 have a tdp around 80W and whereas a N3150 is 6W. My question is what prevents founders to build CPUs with a proportionate consumption with performance. Said differntly, why can I not have ...
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1answer
39 views

Running Compaq laptop without charger and battery

I have a laptop with a fried charging circuit. I plan to disassemble the battery and connect the leads to a 12V PC PSU. The problem is, is the 12V within the battery cutoff range? The battery is ...
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0answers
8 views

Intermittent problems that only go away when the system is unplugged

I have an X99-PRO/USB 3.1 based system that experiences intermittent issues such as being unable to POST or the NIC not transmitting packets (but reporting that it is). The variety of problems seems ...
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votes
1answer
113 views

Can I use car battery directly to supply power for my router?

I Have D-LINK ADSL router that needs 12V/1A DC power, I want to give it power from my old car battery (12V). Is that safe?
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14 views

How to suspend / sleep / spin down disks in RAID - Created by the Debian installer?

I have created a RAID 1, with two disks using the debian installer. The RAID is used in my server. Due to the fact that it's a private server and I don't care about performance but more about ...
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1answer
37 views

Lock when power button is pressed in Windows 8

I have a surface, and it's getting very irritating when it sleeps when I press the power button. Since I use it mostly as a tablet, I'd like it to behave as one, and lock when I press power.
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1answer
38 views

Asus X551M no power at all

My issue is the same as the one here: Asus x551M shut down and won't come on, but this has not been resolved. I have tried: Removing the li-ion battery, Removing the CMOS (which was ...
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1answer
61 views

Electricity causing PC to go slower?

Me and my friend build a PC recently with an 850W EVGA Supernova power supply, Intel core i7 5820k overclocked to 4.5 Ghz, Asus X99 motherboard... . At my place everything was working fine untill he ...
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1answer
18 views

Custom PC won't boot

Recently replaced PSU and now pressing the power button gives less than a second of light, as well as psu and cpu fans spinning ~ one revolution before stopping again. Have tried clearing CMOS, all ...
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1answer
43 views

Do USB power supplies send signals indicating energy level being delivered?

Do USB power supplies send signals to tell the connected device (tablet/phone/camera) how much power is being supplied? Or, is measuring it the only way for the device to know how much energy is ...
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0answers
65 views

How do I fix ASUS 1225/R252 Series, specifically the ASUS 1225B netbook WILL NOT POWER ON?

ASUS 1225B - AMD E-450 1.65GHz Netbook - 4GB RAM, - 320GB HDD, 11.6in - Windows7 My ASUS 1225B netbook won't power on. First the 15 pin D-Sub monitor output started being temperamental, then the ...
0
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1answer
24 views

Laptop Power Supply with detachable cables

I have an Acer laptop which gets a lot of use. The problem is the charger. Due to wear and tear the cable has split (see photo). I could easily get a replacement power supply, but I'm wondering if ...
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1answer
20 views

Power charger Asus laptop

My model number X550L is not mentioned in a list of compatable modal numbers. Some look close to me i.e. few letters different X550CA X550CC X550VB and the one shown is 19v 3.42A witch would match the ...
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1answer
23 views

My PC comes out of hybernation on its own

Does anyone know what wake source 0 means? Please no diagnostic steps - just what is wake source 0. I.E.- What device it is referring to if it is a code to some device or procedure. I went to the ...
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24 views

Odd +5 voltage sensor reading

A long time ago I had this 'issue' with the sensor reading of the +5V rail. It disappeared from the sensors. I checked it on programs like on HWmonitor, AI suite and even on the BIOS. Then yesterday, ...
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1answer
36 views

X220 sudden power off and other power issues

In the past week or so, my Lenovo X220 laptop (bought in mid-2011) started to give some power troubles. The first time, it just suddenly turned off completely without any warning (no blue screen, no ...
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0answers
26 views

Choosing WiFi Router/Repeater Antennas: Gain vs Directionality + Combinations

My apartment complex offers free WiFi, and the landlord has said I may use it from my apartment, but the signal is quite weak. I would like to get a range extender to pick up the distant signal but ...
0
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0answers
36 views

TV screen turns off/flickers when connected to computer through HDMI

My computer is connected to three displays: Cable: DVI - Display: 27" computer monitor Cable: DVI-HDMI - Display: 24" TV Cable: HDMI - Display: 50" TV (routed through an Onkyo 5.1 surround sound ...
2
votes
1answer
28 views

When I turn on my PC,why it spins for a second then restart automatically? (when I unplug and plug in back the power cable)

I have recently built a custom PC, it works (I think) very well other than the issue below. Since I just built it, I was still playing around with that (changing fan positions, adding new fans, etc.. ...
3
votes
1answer
28 views

Laptop is not turning on with working charger

When I am connecting the charger to the laptop, the laptop is not charging (LED light is not on) and LED on the adapter/charger also turning off. I don't know what could be the problem? Things I ...
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0answers
13 views

Powertop wrong values

I was wondering why power est gives 0mW for all the processes that are running in my laptop. Even though some of them needs a lot of computation. Here is a screenshot of the output of powertop, thank ...
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0answers
19 views

Make laptop turn on automatically

I have a laptop of IBM X41. I want to use it in a project in making in which it will be used as kiosk. If power goes out and comes back I have to press the power button to turn the computer back on. ...
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1answer
45 views

My computer turns off after 0.5 seconds

Since this morning, my computer won't start. I was using it normally (playing) and it suddenly turned off. Now it won't start. Sometimes, when I press the power button, it starts for half a second to ...
0
votes
1answer
39 views

My old monitor Samsung Syncmaster 740n needs 2-3 min to turn on

When I power on my old monitor Samsung Syncmaster 740n, it needs needs 2-3 min to power on. When it turns on, it works fine. What can be wrong with it and if it possible how to fix it?
3
votes
2answers
987 views

Laptop battery charging stuck at 90%

My laptop battery charged week ago up to 100% (fully). Recently, I noticed (within this week) that it now charges only to 90%. First sign was that laptop battery led now always orange (charging) and ...
0
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1answer
28 views

After closing lid I still must press power button to turn screen on

On my Windows 10 64-bit machine, the "when I close the lid" settings is set to: On battery: Do nothing Plugged in: Do nothing Yet after I closed the lid and open it again, I still need to press ...