Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: help troubleshooting a computer that wont turn on

22 Feb 2010   #1

Windows 7
help troubleshooting a computer that wont turn on

i have a computer that i am trying to fix. here is the problem:
when you press the power button, there is no signal to the monitor (nothing at all, no bios, nothing) , and the monitor just goes to sleep . i opened up the pc and saw that the fans were working fine when i turn it on (thinking the powersupply might be ok).
i think it could be two things, the power supply or the motherboard.
my predictions are that it is the video on the motherboard (no video card)

please help me troubleshoot this computer, i have purchased a powersupply tester, but the instructions are not clear at all, so i am no too sure how to use it. here is the power supply tester that i bought.
if someone could give me easy instructions on how to use it that would be great! - Rexus PST-3 Digital Power Supply Tester with LCD - PC Tools

i would really appreciate your help

My System SpecsSystem Spec
23 Feb 2010   #2

Windows 10 64 bit

A power supply tester will check for voltages, however that is with no load on the power supply and many times a power supply, if it's bad, will not fail until it's put under load (connected to the PC). Thus the testers don't give you the full story.

If it was just the video, the PC would boot up, do you hear the hard drive accessing? if not then there are other problems than the video and it is not powering on correctly.
My System SpecsSystem Spec
23 Feb 2010   #3

Windows 7

this particular computer does not have a hard drive light so i cant check if it is accessing the hard drive
is there any other way to check?
My System SpecsSystem Spec

23 Feb 2010   #4

Microsoft Community Contributor Award Recipient


Try this:

Try with a Vodeo card.

Remove BIOS battery, Power cable, & hold Start button in for 10 sec.

Reseat all hardware.
My System SpecsSystem Spec
24 Feb 2010   #5

Windows 7

luckily, after disconnecting and reconnecting every connection, the computer turned on, but then it turned back off
i then removed one ram stick and that seemed to solve the problem, it has been running for about 5 hours now and i restarted a couple of times and its working fine now
when i removed the ram stick i found out that they were different. one of the sticks is ddr2 pc5300 and the other is pc 4200. i thought this was wierd because those are the stock ram sticks, they were never upgraded or changed. they were also different branded rams
i think that might of been the problem
My next step will be to perform a memory test with the other ram stick using a linux live cd to check if it is bad
i will come back with the results

-edit from my last post--now that it turned on i was able to see the hard drive light
My System SpecsSystem Spec

 help troubleshooting a computer that wont turn on

Thread Tools

Similar help and support threads
Thread Forum
BSOD randomly, and the computer wont turn on
hi, im getting a BSOD recently, and it always happens while i'm using my computer (browsing, watching movies) after that the computer wont turn on (but you can hear the sounds of the cpu and the fan is working). sometimes the computer also works after the BSOD. its unpredictable. i dont have the...
BSOD Help and Support
Computer shut of and wont turn on.
Hi, today my computer turned off randomly and i cant get it to start again. When i try to turn it on the fans doesen't start but a blue light in my computer is on as usual. Its like the computer is on, exept the fans. My monitor isent responding either. This have happened a few times this week...
Hardware & Devices
Computer Tower Wont Turn on
Hi my computer is a windows 7 home premium 32 bit . My friend built it for me and im not very great with computers but i usually leave my computer on. It works fine its a great system and one day when i left with my friends to go fishing it was on but when i came back the next day it was off. So i...
BSOD Help and Support
So far Im impressed, but my computer wont turn off..?
When I go to start> shut down, windows 7 shuts down and my monitor loses input, but my computer (fans, lights, processor, hdds, ect.) stays on completely. I have to manually hold the power button to shut down. I have checked the power settings and googled this problem but havnt had any luck. ...
General Discussion
my settings wont save & keep reverting after i turn off my computer
for exampel. i disable the touchpad, disable the jump list & cant get a saved notepad document to open in max size. either the changes dont happen or they revert back. both of these happen after i make the settings changes.
General Discussion

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 16:47.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App