A power supply is an electronic device that supplies electric power to another device, such as a computer, monitor or printer. This is achieved by converting wall power (or mains power) to a lower voltage, and in most cases also from AC to DC. Most power supplies also provide protection from ...

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36 views

Laptop adds harsh noise to sound playback while running on battery

I've looked at what others have said to those who asked with similar problems, and it seems to be a power supply issue. The louder the sound I'm trying to listen to is, or the higher the volume, the ...
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117 views

Laptop died after using a SATA/IDE USB hard drive converter

So I think I have done something very bad, I have a HP laptop and wanted to recover some data from some old SATA and IDE drives. I Bought this http://www.amazon.co.uk/gp/product/B00VR52ZZ0?psc=1&...
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votes
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62 views

Battery Stops Charging Randomly

I have a Lenovo E540 running Windows 10 x64. For quite a while now, I've been having problems with how the battery charges. When I plug it in, it will always start charging - maybe for only 30 ...
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52 views

No POST on new built desktop

I just finished building a desktop again and it will not perform a successful POST. No beeps or video either. Since my goal is a successful POST, i removed all irrelevant hardware already and am only ...
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170 views

Under what conditions will a group-regulated PSU damage a modern computer?

These days group regulated power supply design is considered obsolete and is ideally avoided -- primarily due to the poor regulation under crossload. For example, Shilka pulls no punches here, and ...
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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
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231 views

i7 4790K | Shutdown while running Prime95 and RealBench

The computer experiences a hard reset instantly with Prime95 "Small FFTs" torture test (also with the "Blend" test but after 30 minutes) and after 4-5 passess of RealBench benchmark without any kind ...
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374 views

Monitors keep blacking out with “hardware disconnected” sound

For a couple of years, I've had trouble with my homebuilt dual-monitor PC. It's set up to shut off the monitors when not used for several minutes. The problem is, when I wake it up, about 5% of the ...
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0answers
84 views

Desktop PC has stopped powering up

I've gone through the two existing questions I found that seemed to the closes to my situation, tried most of the proposed fixes, and I'm still not getting any results. Those questions where: ...
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0answers
98 views

Third-party AC adapter for Acer Veriton L460 desktop causes fans to continuously run at full speed, even when system is powered off

I'm not sure this is the the right place to be asking but it seemed like the best option. I acquired an Acer Veriton L460 (Ultra SFF Desktop) which requires an AC converter of 19V 17.1A so I ...
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171 views

2nd monitor won't turn on after computer power off

I've got two identical screens both connected via DisplayPort to a GTX 970. Then one day only one of my monitors turned on after I turned on the PC. My main monitor turns on just fine - every time. ...
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50 views

Testing my PSU, and GPU

Bit of a complicated situation people.. But my main question is my PC seems to be running on my psu but it has a problem with my graphics card. It needs two six pins to run it.. The card runs on my ...
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234 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 ...
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86 views

What controls the RAM voltage value?

Quite simply, is the RAM module responsible for generating its own operating voltage or does it just run at whatever voltage the motherboard is providing? I am imagining that it could either ...
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votes
0answers
2k views

Force Windows 7 to think it is running on Adapter Power and not battery

Anyone know how to make a Windows 7 Laptop think it is running on AC Adapter power? This laptop (HP G62 series) has a usable battery which holds charge but it has a not-official power adapter which I ...
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0answers
221 views

HP ProCurve: Iterface X is Link Down (errno 365)

In my Home Environment im Using a Windows Server 2012 R2 datacenter (received from dreamspark) to manage my "home-domain". My server has 4 physical network connections, used like this: Nic 1 and Nic ...
2
votes
0answers
82 views

Computer won't power on

Was working fine for over a year, now won't boot. LEDs on the GFX card and one on the MOBO labeled PWR glow when plugged in, but nothing happens when I push power and shorting switch pins does nothing ...
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2k views

Random BSOD crashes when all RAM slots are occupied

Although I'm a long term user of other StackExchange sites this is my first question on SuperUser, so please let me know if I've neglected any community customs I am experiencing regular BSOD crashes ...
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0answers
876 views

Random gray screen while playing game

I have a strange issue with my PC. When I play 3D games, sometime (not always) the screen just turn gray with vertical line while the computer seems to be still working. I though at first that the ...
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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
798 views

HD5450 black screen after installing drivers

I just build a new HTPC-ish desktop computer and everything works fine until I install the ATI drivers for the videocard which is a Asus HD 5450 Silent 512MB DDR3 card. The main issue is that I get a ...
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votes
0answers
3k views

Normal PSU voltages?

So i've been having some freezes here and there. After checking out my temps (normal), my memory (ran memtest x86 for 3 hours with no problems) and a cpu stress test (also, no problems), I decided to ...
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18 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 ...
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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- ...
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32 views

Asus Zenbook UX31A not booting

I have been trying to repair a Asus Zenbook UX31A for quite some time and would like to pick your brains, because I am finally out of ideas. When I received the Zenbook it was not booting, not ...
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34 views

Power laptop battery without internal power circuit

I have two identical laptops and one of them is broken. I expect it has something to do with the charging circuit. The laptop works fine when it is provided with a full battery. But it doesn't receive ...
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0answers
36 views

Computer starts for a second but then turns off

Yesterday I got a new motherboard as one of the RAM slots was not working. After I put the new motherboard in--keeping all my old components--the computer would start for a couple seconds and then ...
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vote
0answers
27 views

Compaq CQ61-319WM will not boot from just AC; dead battery has to charge

A friend gave me an old laptop to play around with, and it's exhibiting a peculiar symptom: it has to charge up the battery for a few minutes before it will turn on. The battery does not have much ...
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0answers
74 views

PC won't boot - Reasons unknown

So a few weeks back I bought a GTX 980 and in order to power it with longevity in mind, a Corsair AX860, an 860W Platinum PSU. It was working for two weeks and then I got "power surge warning/error" ...
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0answers
161 views

Laptop stops and starts charging randomly

I have an ASUS laptop and it randomly starts and stops charging without moving the cables. The battery is brand new and seems to be working fine. The DC Adapter is professionally tested and seems to ...
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vote
0answers
34 views

FPS Skips due to Power Issues, is there anything I can do on my own to fix it?

My laptop skips frames. I tried to pin-point the issue and I finally have. My gaming laptop (Asus, 17.3", GTX 960m, 4gb, 12GB, i7-4k, SSD). It used to work at full-speed (All Max SC2 at ~100 fps), ...
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0answers
27 views

optical mouse only works near an electric field

two days ago,i faced a serious problem my optical mouse stop working suddenly. it just simulate a click and hold instead of single click and other strange things. i released that it works fine only if ...
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41 views

Internal HDD stops working and the led indicator not flashing

I have 2 HDDs, one is old and one is new. Recently my PC has a problem. HDD stops working and I sure about it because the led indicator of front panel is not flashing. I removed the old HDD and it ...
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0answers
113 views

5v rails is getting 5.7v even with new PSU

I need help. I'm on my mobile typing this so i'll be word efficient. (English is not my native language and I only have a basic understanding of pc's) What's the problem? After the weekend I tried ...
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vote
0answers
147 views

I keep getting the “USB inserted” sound whenever I plug or unplug something to a power socket. Should I worry?

I own a Lenovo G510. I use a cooler base external mouse keyboard monitor 2:1 speakers Whenever I plug something to a wall socket that is near to the one that I use to power everything (when ...
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0answers
224 views

PC won't boot with more than one monitor plugged in, but once booted, works perfectly with multiple monitors

So my graphics card is an asus nvidia geforce gtx 750ti, and works perfectly with multiple screens. The problem is that the computer will not boot with more than one monitor plugged in, but after it ...
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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 ...
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vote
0answers
161 views

Computer randomly loses signal to monitor

Around a month ago I build my first computer, and I've had no problems until now. For about a week my computer has lost signal to the monitor, is only able to be turned off from the PSU. (The fans ...
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51 views

Computer fully restarts with no POST under any significant load

Specs: i5 3570k GTX 670 Corsair HX750 PSU I built my desktop a few years back and it has worked like a charm up until the past week. Whenever I try to play any game, besides non-intensive stuff like ...
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0answers
32 views

How to troubleshoot occasional failure to boot?

This only happens 10-20% of the time, which makes it tough for me to analyze. Basically, when I try to wake the PC from sleep or try to boot shortly after turning it off completely, nothing happens. ...
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vote
0answers
652 views

Can a PCI-E 6 pin cable be used in-place of an 8 pin cable?

I yesterday returned my GTX 960 as it was faulty, and have bought an R9 290, which requires two 8 pin PCI-E cables. I have two 6 pin PCI-E cables, which supplied power the 960. The only difference ...
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vote
0answers
97 views

PC shutting down every 30 minutes

I changed my graphics card and PSU today (went from 650Ti to GTX 770 and Thermaltake PurePower 430W to OCZ GameXStream 600W). I plugged these components in, at first I didn't fit the 20+4 pin ...
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0answers
262 views

Computer crashing when I play games

Specs: Intel Core i7-3930k Corsair H70 CPU Water Cooler 16Gb DDR3 G.Skill 4x4Gb 1600Mh 120Gb Intel 520 Series SSD 2Tb WD Caviar Green WD20EARX SATA 6Gb/s 64mb Cache SATA3 AMD Radeon R9 ...
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0answers
307 views

Dell Vostro 3560: 3NB8W3 battery not recognized, problems with charging

I've been using standard battery for a while, but finally I bought extended battery (3NB8W3, 11.1v 8700mAh 97Wh). Sadly, my Vostro 3560 does not recognize battery properly. I always have "Plugged in ...
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0answers
402 views

PCIe power from a Dell Optiplex 7020

We've just purchased a new Dell Optiplex 7020 to house a PCIe digitiser for use in scientific work. The PCIe card in question needs extra power in the from of a 6-pin 'PCIe' power cable. ...
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0answers
307 views

Graphics card fans very loud, no video/unable to boot

So let's back up a few months. I came back from work one day to find my computer on (I remote desktop to it occasionally) but my graphics card (Gigabyte GTX 770 OC-2GB version) fans running very ...
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165 views

Waking from sleep causes instant shutoff

I am going to be very detailed as this seems extremely confusing to me ... I just completed upgrading a few components in one of my builds (list of components at end of thread). Everything works ...
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147 views

reliable/redundant PSU for SOHO server build

I am after reliable SOHO server build. I went with ECC RAM, quality NAS-grade harddrive and now I am looking at the PSU. I cannot seem to find any good redundant PSUs that would fit into the ATX form-...
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0answers
2k views

Power LED keeps Blinking - Asus p52f Laptop

I am facing an issue since a long time. I own Asus p52f series laptop, it's 3 yrs old right now. 2 months back I had to change the laptop battery, since I couldn't find the original Asus laptop ...
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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 ...