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

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4
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0answers
129 views

Computer wakes from sleep instantly. No lastwake information

My parents' computer wakes instantly when put to sleep. It spins down and then starts a second later. There are no devices set to wake, lastwake gives no information, eventvwr is empty, and the power ...
3
votes
0answers
475 views

Ubuntu 12.04 shuts down suddenly when running on fully charged battery

When I use battery power in Ubuntu 12.04, it sometimes suddenly shuts itself down without any warning even though I am sure that the battery is almost fully charged. This never occurs when plugged in (...
3
votes
0answers
482 views

RAID 5 array degraded - Intel Matrix Storage Manager suddenly says all 4 disks are “Non-raid disks”

Long story short, I have a linux (ubuntu 10.04 LTS) server with a 4 disks configured as a 2 TB RAID 5, set up with Intel Matrix Storage Manager v8.0.0.1038 in BIOS. My power went out, and the UPS ...
3
votes
0answers
785 views

Windows 7 won't wake when opening lid

I've got a Samsung Series 5 laptop running Windows 7 SP1 Home Premium, fully patched. It used to wake up from sleep by opening the lid, when I would put it to sleep by closing the lid. Unfortunately ...
2
votes
0answers
313 views

Won't boot after inserting new RAM sticks

I bought a new pair of 4gb RAM sticks today. Thinking it'd be easy to install, I powered down, slapped them in and powered on. It wouldn't boot. Fans spin up, a couple of seconds pass then it powers ...
2
votes
0answers
233 views

What about placing a voltage regulator behind an UPS with modified sine output, to protect an active pfc psu?

I moved to an area/building where there are quite some problems with the wall-power supply. Primaraly I would like to protect my computers, secondary I would like have some affordable UPS for some of ...
2
votes
0answers
378 views

Why would my notebook only turn on after several attempts?

It was working perfectly fine until I changed it's Celeron processor for a Core 2 Duo today. Now it only turns on 1 out of 5 or 6 attempts. Sometimes at the 1st or 2nd attempt. It's pretty random by ...
2
votes
0answers
644 views

PC won't start unless I reset CMOS

Situation: My PC is dead in the water. Both power buttons (Case/MB) have no effect. If I pull the power cable, reset CMOS, reconnect the power cable, then press either power button the PC fires right ...
2
votes
0answers
639 views

Kernel Event ID 41. My system keeps shutting off during games

here's hoping you guys can help me. This is a homebuilt system I put together myself. This is the build (I got a 7870 instead of a 7850, though): http://pcpartpicker.com/p/eZgE This error has ...
2
votes
0answers
803 views

Seagate external hard disk does not power down

When my computer is off, this external hard disk remains on, consuming power. It is permanently warm, and inside components are active (perhaps the fan?). I have a UPS for the system so a complete ...
2
votes
0answers
1k views

Computer randomly turning off after BIOS update?

I recently built a new PC, which has been running fine up until a BIOS update yesterday. I normally wouldn't update BIOS unless there were issues and in this particular case, the AMD FX-6100 CPU I'd ...
2
votes
0answers
205 views

Acer strange battery dissassembly issue

last week I bought an Acer M5-481T ultraportable laptop. Everything was working fine with the laptop and battery until I decided to disassemble it to upgrade the hard drive, which was a few days after ...
2
votes
0answers
26 views

trouble with startup after power failure

The last few times the power went out I have had trouble restarting. The monitor shows entering power save mode. I then hold the start button in to cold boot. After the flashing amber light goes on ...
2
votes
0answers
185 views

Unexpected shutdown due to PCI card

I've got a home theatre PC which I built myself and have been using for about 4.5 years now without issue - the only components that have ever needed replacing have been the case fans. Recently, I've ...
2
votes
0answers
416 views

Why isn't my computer turning on?

I did a test boot with just the CPU and power supply hooked up to the motherboard. I tried to short the 2 power pins on the motherboard, but that didn't work. However, when I shorted all of the pins,...
2
votes
0answers
579 views

HP laptop power problem, won't start

I shut the laptop down last night properly. Now while trying to turn it on with AC Adaptor it is not responding in any means. The only lit led is charging one, indicating that it has got the adaptor ...
1
vote
0answers
17 views

Dell Inspiron 3420, Charger Plugged in , Charging, But Battery Percentage not going up

I got a problem from last few days, searched every where for solution but all in vain. Description: I have DEll Inspiron 3420. When I plug in Charger,it shows charging but Battery level remains at ...
1
vote
0answers
24 views

Enable Sleep Windows 10

I was trying to enable hibernate on my Windows 10 PC. (It was purchased as Win10, I did not update it from 7 or 8). I typed powercfg -h on in an elevated command prompt. When I shut down my computer ...
1
vote
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 ...
1
vote
0answers
44 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 ...
1
vote
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 ...
1
vote
0answers
76 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 ...
1
vote
0answers
58 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- ...
1
vote
0answers
27 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 ...
1
vote
0answers
83 views

Can a non spec conforming DisplayPort cable damage motherboard or graphics card?

I'm having some weird problems with my workstation, here are the relevant components: PSU: Corsair AX860i CPU: Intel Core i7 6700K GPU: Asus STRIX GTX970 RAM: G.SKILL Ripjaws V DDR4 2x16GB (F4-...
1
vote
0answers
130 views

HDMI not working while plugging in Power charger to the laptop (works fine with battery only)

I have an Acer Aspire 6930 with Nvidia 9600m GT GPU, there is a weird issue that occurs when I connect the Acer Aspire to an LG TV with HDMI cable... the Laptop recognizes the TV and everything seems ...
1
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0answers
24 views

Excel 2013 Power Query

Does anyone know how to extract all Active Directory Users and show which ones are Users and which ones are just Contacts. I've extracted both Users and Contacts but they seem to show the same in ...
1
vote
0answers
39 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 ...
1
vote
0answers
63 views

Power off discrete GPU when not in use to save power

I am trying to setup a virtual Windows system on Arch Linux using VGA passthrough. One issue with this I see is that the GPU will just idle 24/7 using a large chunk of overall power for no good reason....
1
vote
0answers
45 views

Windows 10 stops after hibernation

I have a problem with my windows 10. It is convinient to me to hibernate my laptop, so it loads fast after that and everything is saved. So I usually use hibernate. But when I installed windows 10 ...
1
vote
0answers
35 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 ...
1
vote
0answers
28 views

HP Mini won't work with battery alone without an AC power

What to do with HP Mini netbook that doesn't work without AC adapter? Even if the battery is attached and with 80%-up power charged. I consider that maybe need replacement and I did with the working ...
1
vote
0answers
32 views

no power after resseting cmos?

My computer wouldn't let my usb keyboard work on boot and i could not access BIOS. So, i did what i usually do and remove the battery from the mobo and put it back again.At first, it would turn on but ...
1
vote
0answers
74 views

Put computer to sleep, leave for 2+ hours, come back and its shutdown and won't turn on

I built my computer maybe 5 months ago, and it has been running fine up until a couple of weeks ago when I had it in suspend, and then it decided to shutdown and wouldn't turn back on. So I tried ...
1
vote
0answers
212 views

Sata Power Connection Broken Off but Pins are ok

So, that crappy plastic connector holder on my hard drive broke off while I was moving drives around. Does anyone have any suggestion on a work around, I've tried crazy gluing a Sata Power plug to it,...
1
vote
0answers
150 views

How to run an application in linux just before poweroff and after linux shutdowned itself

I have a embedded system that needs to be power off itself after shutdown. To power off, the Linux should send a command via an i2c to another device to power off the Linux board. So to shutdown and ...
1
vote
0answers
37 views

Prepare Debian/Raspian for Power Loss

My school is in the process of buying two Raspberry Pis for use in the commons to display the news. I'll be creating a startup script to automatically a USB flash drive with a video on it, and to have ...
1
vote
0answers
22 views

Cursor hangs for a second when turning off sound system from the powerstrip

I have a curios hardware issue that I'm worried about. I have my desktop plugged into a regular power strip without surge protection or on/off switches. In one of its plugs there's another power strip ...
1
vote
0answers
66 views

Randomly loosing power to all USB ports than forced to reboot

This is going on since about 2 months now. A wrong mouse move and everything stops. All USB ports loose power. My first thought was acceleration , or combo between Skype and Adobe Suite. Wrong. ...
1
vote
0answers
50 views

mild electric current on the table and case

I have a UPS to which the case, monitor, etc. are attached. The problem is that when I plug the case (SMPS) power supply cable into the UPS touching the case and the table (on which the computer is ...
1
vote
0answers
159 views

git corrupted on ubuntu vbox, power failure with proper shutdown

i use git on ubuntu headless server on virtualbox on my laptop. when i shut down the pc, i don't bother shutting down the virtualbox, i just shutdown the pc. it never was a problem. it was fine since ...
1
vote
0answers
485 views

Why do my network interface and powered-off backlight consume too much power in powertop?

I have an ASUS n550jv laptop. Currently, the wifi is off, the ethernet is active, and the display is completely off (using an external monitor). Yet, in powertop I see the following: The battery ...
1
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0answers
225 views

“Check Signal Cable” when computer is off - how to make it just a blank screen?

I upgraded the graphics card (NVIDIA GeForce GTX 670) driver tonight, and I'm having this odd problem. State: monitor is on and computer is off Before update: the monitor went into sleep mode(?) and ...
1
vote
0answers
51 views

Linux's poweroff resets the machine instead of powering it off

I'm using Fedora 20 with Gnome3, and sometimes when I click on Power Off, the machine resets instead of powering off. Actually I don't know if it's being reset or if it's being powered off and then it ...
1
vote
0answers
597 views

Can I Power the front-panel USB 2.0 ports with the power supply's 5V rail?

I have a high power (700ma+) USB device I wish to use on a single front-panel USB port. The USB specification in Wikipedia states: The USB 1.x and 2.0 specifications provide a 5 V supply on a single ...
1
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0answers
516 views

RAM capacity vs power consumption in S3 Suspend-to-RAM mode

My netbook with 1GB DDR2 RAM module takes 16% of battery for 24 hours of S3 standby mode (STR - Suspend-to-RAM). That amounts to the power consumption of 0.32 Watts in standby. That also means that ...
1
vote
0answers
203 views

Trying to run computer off DC but monitor is always blank

I am trying to get a computer to run off a DC battery. The computer seems to start fine (the CPU fan spins and the hard drive whirs), but nothing displays on the monitor. It just stays blank, as if ...
1
vote
0answers
84 views

windows 7 monitor instantly resumes from power off

It seems that some service or program is preventing my monitor from going into power save mode but I cannot find a way to dig down the cause. Does anybody know a way to find out which event may be ...
1
vote
0answers
186 views

Should The Plug of UPS Always Plugged?

Which is better for lifespan: Switch off the UPS and plug off or Switch off the UPS and leave it plugged in. Consider this two statements and give seperate replies: Which is better for >1 Month (...
1
vote
0answers
436 views

Can't see the power options icon in the notification area

I've formatted my windows 8 64 bit laptop, and encountered the following issue: The power options icon won't show up. I tried adding it manually, but it shows the massage "This notification icon is ...