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

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3
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0answers
336 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 ...
2
votes
0answers
82 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
102 views

Thinkpad laptop flooded with liquid while powered off, won't turn on anymore [not trivial]

A classic IBM Thinkpad T30 (MT2367) laptop has been flooded with a salty water for a period of ~2 hours while powered off, having AC cord unplugged & both batteries (main battery and a tiny backup ...
2
votes
0answers
212 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
270 views

Where did the Undock laptop option go in Windows 8.1?

I recently upgraded from Windows 7 to 8.1 and have some trouble finding features. In Windows 7 under the Shutdown menu, there was an option to undock my laptop (as well as Sleep, Hibernate etc.). Now ...
2
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0answers
416 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
303 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
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0answers
511 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
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0answers
160 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
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0answers
23 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
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0answers
337 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 ...
2
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0answers
70 views

Can append only NTFS files become corrupted if power goes out?

NTFS journals metadata so the file system itself doesn't corrupt if the machine goes down. I read this is not the case for file data itself. But what if the data is only appended at the end of the ...
2
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444 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
10 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
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0answers
31 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
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0answers
204 views

PicoPSU problems with BioStar A68N-5000

I build myself a low power NAS system and I'm trying to power it with a PicoPSU and an external brick power supply. When I turn on the power the case fan starts turning for a second and then stops ...
1
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0answers
37 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
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0answers
41 views

Laptop turning on when touched

I'm trying to help a friend fix their Toshiba Satellite A665 because its been shutting itself off at random times until it got so bad that it doesn't make it past the BIOS screen before shutting off ...
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0answers
63 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
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0answers
32 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
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0answers
525 views

I have dell inspiron 545 desktop. It won't start up unless I remove the bios battery

I have dell inspiron 545 desktop. It won't start up unless I remove the bios battery. The issue first appeared 2 days ago. I left computer a few hours and when I got back the screen was black,lamp ...
1
vote
0answers
186 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 ...
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0answers
193 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
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0answers
76 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
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82 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
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0answers
189 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 ...
1
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0answers
93 views

How important is it to keep UPS connections either filtered or not?

This question is somewhat difficult to summarize into a good title, so let me explain what I am talking about. I have a setup where an ADSL modem connects to the telephone network. The power supply ...
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0answers
347 views

How do I change power settings on my laptop to hear audio while running on battery?

I have a Lenovo ThinkPad with Windows 7. I can hear sound when my laptop is powered up on AC power. While on battery power I can not hear streaming media, such as YouTube. I was informed that I ...
1
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0answers
61 views

Windows reboots randomly on battery, linux OK

About a week ago, the Windows partition on my laptop started rebooting randomly. No BSOD, nothing in event logs besides a kernel-power failure. I could still use linux (LuninuxOS) fine, and windows ...
1
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0answers
134 views

New power supply won't start

I replaced my power supply with a new one. I connected all cable to the motherboard 24-pin and Molex, HDD and DVD power cable, then I started my PC and I used it for about one hour. After I shut ...
1
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0answers
114 views

My laptop behaves strange after suspend

When waking my laptop from suspend, it behaves very strange - the CPU quickly gets hot and the battery drains insanely fast. Looking into powertop, there is a process called 'rtc_timer_do_work' that ...
1
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217 views

1.8 VDC POWER remains on USB after SHUTDOWN (HP Compaq Pro 4300 SFF - Product ID: QZ219AV)

I am having unexpected opportunities with a USB Device failing to properly initialize on startup after a shutdown, which seems to be caused by residual power remaining on my USB Ports (after ...
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187 views

Protecting Against Inrush Current

In my apartment, the main circuit breaker has a very low amperage limit of 5A (220V), with a maximum power limit of 1300W. Therefore, about 75% of the time I plug in my PC power plug, the inrush ...
1
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0answers
162 views

How to switch to laptop screen from external display automatically on power loss?

I recently got a external LCD display for my laptop. It is connected via the VGA port. I am using the "Projector Only" mode by pressing the Fn+F3 function on my laptop. This makes the laptop's screen ...
1
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0answers
542 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 ...
1
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0answers
440 views

Possible to bypass laptop inverter power source - HP dv5000 inverter 7 input pins?

I've got an HP dv5000 laptop with a backlight that won't light up, (but is known to be good). I've also got an inverter board which is good, but isn't getting power from the mobo. So, my question ...
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0answers
130 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 ...
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0answers
36 views

Connecting notebook to WLAN fails without being plugged in

My parents just installed a new modem/router after having switched ISP's. It installed fine, and (almost) everything works. My dad's desktop is connected with a wire and he has complete access to ...
1
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930 views

Why touchpad glitches when Ethernet cable is connected?

I have two laptops (black and white) both connected to the same mains. when I then with Ethernet cable and connect black laptop to AC adaptor, white laptops's touchpad starts glitching: can't ...
1
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0answers
238 views

Windows 7 on 1st Gen Macbook Pro (Q4-2008), power management problems

I have the first generation macbook pro, purchased Q4 2008. I've been trying to run Windows 7 and can get it all installed great with the BootCamp 3.1 64 bit drivers however ... power management isn't ...
1
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0answers
787 views

Effects of enabling DVFS in a CPU

I came up with this energy regulating software called Granola while reading at Ghacks.net I downloaded and installed the software but you need to enable the DVFS function in the CPU. I booted up and ...
0
votes
0answers
22 views

Laptop battery won't charge past 68% after dc jack replacement?

Sony Vaio FW41E laptop / Vista I experienced charging problems when the prongs on the original dc jack loosened. I have replaced the dc jack and cable, making sure I ordered a compatible part. ...
0
votes
0answers
30 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. ...
0
votes
0answers
34 views

i can't turn on system power icon in win 8.1

The power icon in the system tray is missing. I have tried right clicking the taskbar then selecting properies and then 'turn system icons on or off' the power icon options are greyed out and set to ...
0
votes
0answers
30 views

Dell inspiron n4010 battery won't charge

I'm having a dell inspiron n4010 laptop. The battery was getting weak day by day and one day I used the battery to full of its capacity. From next day on wards the laptop won't power up with the ...
0
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0answers
43 views

Is there any way to “Wake on LAN” a MS Surface Pro 2?

I have a Microsoft Surface Pro 2 that is embedded in an exhibit where it is difficult to access the physical power button. The exhibit space is only open for 8 hours of the day and I would like to ...
0
votes
0answers
21 views

Computer can't boot

I have a 1 year old PC and the last weeks, when I press the ON button the PC doesn't power on ( Like I didn't press the ON button ). I have to plug and unplug a few times the power cord in order to ...
0
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0answers
22 views

How to measure power consumption in Windows 8

I want to measure real time overall power consumption of my laptop and I would do it with a software. After some searchs on the web I found out that Microsoft developed Joulemeter, a software able to ...
0
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0answers
44 views

USB Root Hub power surge with weird SSD behavior

My new laptop seems to be having USB issues. It keeps telling me that there was a "Power surge on hub port" and that a device has "exceeded the power limits of its hub port." Also weird is that in ...
0
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33 views

Would intermittent contact with the service voltage and capacitors in a power supply (inrush current) damage a computer?

If I plugged my laptop AC Adapter power cable into a UPS, causing sparks to blast out (and being unable to insert it due to the UPS being seemingly not designed for this type of plug, for whatever ...