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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Why is my computer shutting off during gaming?

My computer started crashing a few months ago, but it's only occurring during gaming, usually after about 5 minutes of gaming. When it crashes, I cannot immediately press the power button again to ...
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8 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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29 views

Desktop overheating room, is it CPU, GPU, or PSU?

If my door is shut, my computer turns my room into an oven, it's that bad. I'm hoping replacing a part will resolve the issue. Here's some specs: CPU: AMD FX 8320 Eight core GPU: AMD Radeon 6670 PSU: ...
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Power Issue- Not charging

I have an Acer Aspire V5-571 that is not registering the charger is plugged in. The ac adapter is in perfect known working condition. I have replaced the power jack thinking that was the problem, to ...
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1answer
16 views

Can a UK power cable be used with a US laptop power adapter?

I have a US MSI GE62 Apache -002 laptop, its power adapter is rated at: Input: 100-240V ~ 2.7A 50-60Hz Output: 19.5V - 7.7A Can I use it in the UK with a UK power cable?
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15 views

Computer stalling out during gaming and randomly restarting - I think its the power supply. New power supply's don't work?

ISSUE: I think my issue has multiple issues. 1 leads to 2 leads to 3... I think anyway. Are they related? That may be enough to answer my question. Issue 1 is what I attempted to answer, but the ...
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41 views

PC won't turn on

My new PC broke down completely yesterday. This was my first ever PC build, I installed the components myself, but I couldn't figure out the wiring/cables so I went off to a tech-guy for help. He put ...
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1answer
20 views

How to lessen performance impact on Dell laptop with defective power system?

A few months ago, I replaced a broken cord for my Dell Inpsiron 15 laptop. The replacement cord (a slightly different model from the factory cord) worked perfectly until a week ago, when I started ...
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53 views

Is keeping a laptop connected to power supply harmful for its battery? [duplicate]

I heard that charging a Li-Ion battery all the time is practically harmful for the battery and significantly reduces its useful capacity over time. Is this true? Should I disconnect the power cord ...
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1answer
26 views

Surge Protecter's Grounded Light Turning Off

I've got a new PC setup in a new apartment (built before 1980s), however the surge protector I have is doing some funny things. Any help would be appreciated. When I plug the surge protector into a ...
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1answer
23 views

Is it ok to use a Haswell CPU with old power supply?

I will buy a i7 4790k, and I want to know if I might encountered any problem using it with a old 250W power supply. I'm planing to get a new power supply also, but only when a I got my video card. ...
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120 views

Is it possible to apply a time frame to Windows 7 power settings?

The problem: I want my desktop computer to use the High Performance power mode whenever I'm at work, to minimize UI lag, etc. When I'm not at work, I want to enable Power Saver mode. I'd like to do ...
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30 views

Computer power supply fault

This is my first post to the site; it's been a great resource to me in both my professional and personal lives. It's about time I registered! So I went to boot up my desktop this morning and nothing ...
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24 views

Inspiron powers down at random

I have a Dell Inspiron 5348 that shuts down at random as if the plug is pulled. I ran the diagnostics and no fault was found. I have tried various power outlets in the building but that doesn't ...
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1answer
26 views

Overloaded UPS, might it have damaged connected hardware?

I have an APC Back-UPS ES 400, and during a brief power failure (less than a minute), its buzzer sounded continuously. Looking up the manual, this apparently indicates an overload. It's rated to 240W, ...
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0answers
32 views

External monitor flashes occassionally only while power cord is plugged-in

I have a Thinkpad laptop (E550 to be exact) with an i5 CPU and Intel HD 5500 GPU running with Win 7. Since two weeks, while an external monitor is connected (to the VGA port) AND the power cord is ...
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0answers
18 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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2answers
74 views

Why are my drives failling (version 2)?

I have a problem similar to the one described on question Why are my hard drives failing?. I have a PC assembled by my self and It has worked fine for 3 years but recently It have been killing hard ...
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4 views

HP Prolian BL460C power supply converter

I have 3 HP Prolian BL460C servers, but I don't have chassis for them. Is there any kind of power adapter that I can use for, so I can just use normal power cable to plugin? It's not for production, ...
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7 views

Pl4201 Power Line Overheating

My laptop is getting overheating pl4201 IC then getting thermal shutdown and restart with 7 beeps error in dell Inspiron. I have google but can find proper answer. Tech expert in my city tell me ...
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2answers
40 views

Toshiba laptop power light turns off when power button is pressed and the computer doesnt power on

I have a toshiba C655 laptop, As soon as I plug in the adapter the laptop power light turns on with or without the battery, but when I click the power button the power light goes off and nothing ...
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1answer
59 views

I'm in the US and computer only works when power supply is in 230V position. How do I diagnose this?

So, I replaced a computer PSU about six months ago. And, the computer power down intermittently. I've found: it's not over heating. Monitor shows it running cool. it's not graphics related. ...
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1answer
27 views

Squealing coming from laptop power supply? [duplicate]

I have an HP Pavilion dv7-6135dx. This morning, the power supply/AC adapter started making squealing noises for a few seconds at a time. I had it plugged in during a storm that happened while I was ...
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48 views

Computer Don't start - Changed MOBO , PSU , VGA , RAM

I have an ASUS P5W DH DELUXE with Core 2 Duo E6400 and 1GB x 4 ADATA RAM The computer failed to start and started troubleshooting. I changed the PSU (bought 3 of them) [1x450Watt , 1x500Watt , ...
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I disconnected my PC for a clean up, and now the screen is not working

I disconnected my PC for a clean up, and also to change The DVD reader. I trusted myself that i would remember how to connect everything to the motherboard again, but, something is not working well: ...
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21 views

Computer making various noises and sometimes runs slowly

My computer has been making some very strange noises for several months now. The first noise it made was when I installed Speed Fan and after the second time of running the program, my computer made a ...
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1answer
73 views

Brand new computer fails to boot, powers on and off immediately, despite running fine while installing OS

I've exhausted Google search in attempt to solve my issue, and I'm fairly confident there's no single solution but I'd like to get some brand new ideas. The specs: ASUS X99 Sabertooth 8x8GB G.Skill ...
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2answers
76 views

Can my PC handle a Nividia GTX 750 Ti? [closed]

I am willing to update my graphics card to Nividia GTX 750 Ti but I am confused about the power supply and the motherboard if they can support it or not. Motherboard System Manufacture: Gigabyte ...
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0answers
31 views

PC doesn't boot most of the time

PC is now dismantled down to: motherboard (Asus Z97AR) CPU (Core i7) PSU (750W) Motherboard and CPU are new, PSU is old. If you continuously turn the power on, then of, then on again, ...
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0answers
36 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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0answers
40 views

Power supply needed? can I use the same size because old one is near end of life or do I need a larger one [closed]

Symptoms, my computer when it gets going the power will just cut, the power indicator stays lit but everything else dies, all the fans, the screens go dead it does not respond on the network (ssh ...
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1answer
26 views

System keeps changing power mode while gaming

Recently my laptop keeps changing power mode while gaming, like if i disconnected the charger physically. I don't have another charger to test, this is the stock one which has been running fine for 3 ...
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50 views

PSU fan (power supply fan) not spinning. But computer works

The PSU fan on my computer is not spinning at all. I've now run a high def video for 20 mins and it's still not spinning at all. I read there's power saving features that will power down the fan, but ...
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1answer
28 views

Screen pitch black after random shudown, Gpu's fans full speed.

This morning I went to power up my pc and BAM. My screen is pitch black. Noticed that Gpu's fans were at full speed. Switched to my moba gpu and well, it works fine. I cant understand if it's a GPU ...
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0answers
22 views

computer lights up but then nothing

my computer was working fine today morning. then when i switchced it on in the evening nothing..the led near the lights up but thats its not beep sound or anything. even the fans on the PSU and ...
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1answer
43 views

What PSU sizes can I use with a 2U server chassis?

Note that this question is not a hardware recommendation. The actual PSU and server case quoted in this question are given merely as an illustration; the question itself, as it was explicitly ...
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19 views

PC wont boot when graphics card plugged in

I recently got new motherboard/cpu/ram, though the PC wont boot at all when the gfx card is plugged in. Gfx card is still old and quite outdated so I was thinking maybe it is imcompatible? PC ...
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0answers
39 views

How can a case fan with a 8pin connector plug into the 4pin fan header on the motherboard?

I recently bought a Delta 12cm case fan online and it has a 8pin connector (but only 7 wires) which I can't plug it into the motherboard. I put a typical 3pin fan connector beside it in the image, so ...
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41 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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0answers
32 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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1answer
58 views

Computer shuts down randomly - suspected PSU or memory - which one is it?

I have replaced the motherboard and CPU after the old motherboard has died. Now PC is shutting down randomly (it doesn't depend on what sort of software I am running - could be working fine with Adobe ...
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2answers
86 views

How many HDD's off 1 Molex? PICOPSU

First question here. I saw some posts about powering 2 HDD's from one molex, but I want to power 3-4 drives. I want to use a single molex and use splitters for the rest of the drives. Below is an ...
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1answer
74 views

USB Device Over Current Status Detected [closed]

so i had a perfectly working PSU from my spare computer and wanted to use it on some other desktops that i got from a computer repair shop because they said they weren't working.I tried them and they ...
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44 views

My computer automatically turns on from sleep when i hit a light switch of my room

I've had this problem for a year now, sometimes when i turn the lights on, my computer (running Windows 8.1) automatically turn on from sleep and I have to put it back to sleep again, but this almost ...
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1answer
18 views

wireless router power adapter replacement 0.5a vs 0.6a

i have a wireless router with no power adapter, it needs a 9 volts 0.6 amperes adapter but i only have 9 volts 0.5 amperes power adapter. Will 9 volts 0.5 amperes power adapter damage my wireless ...
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13 views

Laptop transformer/AC adapter noisy ONLY when computer is working hard

So, I've seen the questions asking the generic "Why is my transformer making noise?", but my situation seems to be different. It's intermittent. It's not a hum, but a sort of crackly sound that only ...
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2answers
98 views

Monitor, keyboard, mouse not receiving power, computer takes 4 attempts to power up

I have a computer with specs listed below. This morning I turned off the computer to install a pair of USB speakers (Logitech Z5). Afterwards, I turned on the computer, it would power up, but then ...
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2answers
41 views

Higher Amperage and Higher Watt for Laptop Charger [duplicate]

My laptop's charger was not working anymore. So I bought a new one. However I couldn't find an exact matching charger, I bought a different one. My question is; Will there be any problems with new ...
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2answers
68 views

How does airflow work inside ATX PSUs with 12cm fans? [closed]

It sucks in air from inside the case but how does the heated air get out of the PSU? There's holes at the back but we all know that hot air doesn't travel sideways unless forced. Also in my case the ...
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0answers
23 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. ...