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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Workaround for Dell “Power Supply Not Recognised” issue

So, I have a Dell Inspirion and the power supply port appears to be damaged. Basically when I plug it in I get a nice popup telling me that it couldn't detect that its a Dell power supply so it won't ...
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0answers
24 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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2answers
52 views

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

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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5answers
2k views

Does the computer really shut down after I shut it down?

After I pressed Start >> Shut Down >> U, the computer goes off. But hass the power supply still got energy? When I use my old power supply, after I shut down the computer, the light of my mouse is ...
8
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6answers
22k views

How can I diagnose a faulty power supply?

I've got an older PC that freezes/blue-screens at non-reproducible times. I suspect that it's caused by a faulty power supply, mainly because I don't have any other idea. How can I diagnose this ...
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0answers
23 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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2answers
3k views

DELL Inspiron N 5050 doesn't Power On until I Plug-in the Charger

I bought a Dell Inspiron N 5050 last week, and recently discovered a problem with my laptop. It doesn't Power On until and unless I Plug-in the charger. After I plug-in the charger, it boots up ...
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2answers
77 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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0answers
17 views

Missing pieces on UPS model Hantol HU1000 [on hold]

My UPS (for PC) is not working, so when I opened it I noticed several MOSFETs (I think) are missing (looks like its the part that converts DC to AC). Is there any schematic to replace them, because I ...
14
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6answers
3k views

What is the 6-pin power connector on an HP ProDesk?

I have an HP ProDesk 600 G1 desktop PC, and I'm upgrading it with a new graphics card and a new power supply. Now, the problem I'm having is that the motherboard in the PC doesn't have a standard ...
1
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0answers
34 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 [on hold]

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
19 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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0answers
21 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 ...
0
votes
1answer
21 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
16 views

Pinout on an ATX 24 pin PSU Cable

I am relatively new to custom PCs, but I ordered a custom sleeved cable set from Cable Mod and The pin out is different than the cable that came with my PSU. My original cable is only missing pin 20 ...
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0answers
37 views

PC won't work because of power supply

I had an old PC but it won't on because I think I switched between 220v and 110v while it was on. Can you tell me which part of PC is damaged or not? I don't need it anymore. I just want to sell parts ...
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votes
1answer
3k views

CPU fan turns on for a second and stops, PC does not start at all

I have checked my PSU and it works fine. When I turn on the MOBO, the CPU fan, case fans and the psu fan itself turn on for half a second and then turn off. The PC remains off. The Bios light turns ...
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3answers
41k views

How do you check how much power a USB port can deliver?

Some laptops have a special USB port that can deliver more power than the other ones. However it is not always easy to identify which one is the good one, nor how much power it can deliver. So is ...
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0answers
21 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
24 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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0answers
14 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 ...
0
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0answers
33 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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0answers
31 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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2answers
55 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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0answers
25 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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3answers
720 views

My Toshiba Satellite c850 won't display screen

Before this happened, I had some occurrences where my laptop's screen turned off out of no reason. Everything was still on (the sound, tasks in thr computer, fan, etc. was working). I tried closing ...
0
votes
1answer
50 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 ...
3
votes
4answers
10k views

How to calculate Power Supply Watts

I am trying to figure out how the Watts is calculated based on the Volts and Amps on power supply stickers. I am told that the 12V rail is the most important, but I don't know how they calculated ...
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votes
1answer
32 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 ...
1
vote
1answer
436 views

Lenovo Ideapad z510 crashes when connected to AC power but works fine with the battery

I use a Lenovo Ideapad z510 running Windows 8 x64 and earlier today, during a snowstorm, power went out. Later, power came back and I got on my computer. As I was using it, I — idiotically — lightly ...
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votes
2answers
6k views

Can a faulty battery cause my laptop to shutdown even on AC line? (battery installed AND plugged in together)

Until recently, I experience something rather annoying (and troublesome) with my laptop. It spontaneously shuts down itself without any warning, it restarts. No blue screen, no hanging program, just ...
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0answers
38 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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votes
1answer
67 views

Is it a PSU or motherboard failure? Or something else?

My desktop computer suddenly stopped working today. When it happened, the fuse in the house was also knocked off. After switching it back on, I tried to turn the computer back on but nothing happened ...
1
vote
1answer
14 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 ...
0
votes
1answer
199 views

Case/PSU grounding, static causing reboot

I built a machine for work recently that is displaying two distinct characteristics. One: Yesterday, I was able to shuffle feet on our carpet, touch the front of the case, arc static, and the machine ...
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0answers
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
3k views

My Asus Laptop Power Supply is Broken — or is it?

System is an Asus N53S laptop. For several months I've been having the standard problem with a flaky DC plug that doesn't work unless it's positioned just so. Just to make life more fun, the battery ...
0
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1answer
3k views

EVGA Geforce GTX 760 ACX Installation issues

I recently purchased a new Geforce gtx 760 from EVGA with ACX cooling, and I'm quite confused with the power supply. The card came with 2 PCI connectors, however one was a 6-pin and the other was an ...
2
votes
2answers
47 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 ...
-1
votes
2answers
35 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 ...
2
votes
1answer
71 views

Computer crashing about 20sec into booting (even in BIOS). CPU or Motherboard?

EDIT: we seem to have narrowed the problem to CPU or Motherboard. Is there any way I can identify the cause between these 2 without a spare part to test? I was playing Minecraft for the first time on ...
0
votes
6answers
3k views

Preventing the power supply (PSU) from blowing the motherboard or vice versa

Problems with power supply and motherboard compatibility appear to be common. My power supply/motherboard nightmare Power Supply Too Big? Can a +5VSB supply rail value of 5.4V prevent a PC from ...
4
votes
3answers
733 views

Witcher 3 causes PC to restart randomly

(Not sure if I am asking at the right site, as it might be software/hardware related and not exactly gaming. I guess I'll post this question on Arqade too.) I have been having this problem since 2 ...
1
vote
0answers
22 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. ...
0
votes
0answers
20 views

Higher voltage output from charger has affected my laptop and burned some components

My computer has been burned by high voltage output from my charger,but my challenge now is that I opened my laptop trying to find which component have been burned but I cannot see the actual ...
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votes
1answer
38 views

what means this? [closed]

what means evga psu GS and G ? http://www.amazon.com/EVGA-SuperNOVA-80PLUS-Certified-220-G2-0850-XR/dp/B00IKDETOC/ref=sr_1_2?ie=UTF8&qid=1434314521&sr=8-2&keywords=evga+psu
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1answer
42 views

My PC won't start up, what can I try?

My computer has been randomly restarting itself for the last couple of days. Sometimes it would stay on for hours before restarting, other times it wouldn't even get into Windows before restarting. ...
0
votes
0answers
24 views

Computer doesn't start when 12V CPU power plugged in

Configuration (troubleshooting): Board: Socket AM3+ Gigabyte GA-78LMT-S2PT CPU: AMD FX4300 PSU: 500W Peak Other components: GPU: ASUS Nvidia GTX960 Mem: 12GB (8+4) 1333 HDD: Seagate 1TB SATA ...
0
votes
0answers
20 views

How to properly calibrate new laptop battery which shows full capacity as ~20% of designed capacity?

I have a very unique problem as I can see. I have bought a new battery (not original brand) for my 3 years old Toshiba Satellite L750 (running Win 8.1 Pro) notebook. My old battery was about ...
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votes
3answers
3k views

Laptop battery software to disable charging AND battery usage

I'm going to buy a Microsoft Surface notebook that does not have the capability to easily remove the battery. I'm also going to be near a powerpoint for around 90% of my usage of this notebook. To ...