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Windows 7: computer won't start after replacing psu

13 Jun 2013   #1
silkmudah

Windows 7 ultimate 64 bit
 
 
computer won't start after replacing psu

I recently upgraded my PSU in my system and gave my friend my old psu. after installing my old PSU into my friends system it won't boot, it will start and get to the loading Windows screen but it won't show the Windows 7 logo and just freezes on that point. sometimes it will distort the resolution and make it look like bad 3d that you need those red/blue lens glasses for.
I don't know if its because I had to take the fan off the heatsink to get it in but never removed the actual heatsink or cpu. it won't even try to reinstall a fresh copy of Windows it just freezes during that as well. If you need more info let me know and ill reply with what I can


My System SpecsSystem Spec
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13 Jun 2013   #2
Snakeyeskm

Win 7 64 bit professional
 
 

Listing the basic specs of your friends PC (video card in particular) and of your PSU will help in identifying the problem.
My System SpecsSystem Spec
13 Jun 2013   #3
silkmudah

Windows 7 ultimate 64 bit
 
 

AGI-U550UB power supply and its a prebuilt pc its a ACER AM5641-B5540A which is this Acer Aspire AM5641-B5540A Pentium Dual-Core E2200 2.2GHz 3GB Acer AM5641-B5540A
My System SpecsSystem Spec
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14 Jun 2013   #4
silkmudah

Windows 7 ultimate 64 bit
 
 

update, put in original psu and still same problem. any chance that because of me having to remove the fan on the heatsink it somehow made it move and become unusable until resinked?
My System SpecsSystem Spec
14 Jun 2013   #5
linnemeyerhere

Microsoft Community Contributor Award Recipient

Windows 7 Ultimate 64
 
 

It's worth a try to remove CPU and it's thermal paste, inspect the pins very carefully and re-install with new paste. Then boot with only one stick of ram in number 1 slot. Double check all PSU power connections and tell us what happens. If needed you may want to clear the cmos and try again. Once a successful boot then install rest of ram while turned off and reboot.
My System SpecsSystem Spec
14 Jun 2013   #6
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

Are you installing the heat sink back on the cpu before you start up after installing the different power supply?
My System SpecsSystem Spec
14 Jun 2013   #7
silkmudah

Windows 7 ultimate 64 bit
 
 

i technically never removed the actual heatsink just the fan that attaches to it. its a older case with the psu on top and the fan was in the way. i will remove it all and reapply thermal paste when i can and then update
My System SpecsSystem Spec
14 Jun 2013   #8
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

The point I'm trying to get to is: Never run your computer without the cpu cooler installed and the fan installed and working properly.
My System SpecsSystem Spec
14 Jun 2013   #9
alphanumeric

Windows 10 Education 64 bit
 
 

I would reseat your Video Card, and any other add-in cards in the PC. RAM modules too. Also check to make sure your SATA cables etc are plugged in securely. Stuff can get bumped and moved around when doing something like a power supply swap and not be obvious that they aren't firmly plugged in.
My System SpecsSystem Spec
14 Jun 2013   #10
silkmudah

Windows 7 ultimate 64 bit
 
 

I haven't tried running it again and wont until i can reseat the heatsink and such, i will remove the ram and replugged in all cables
My System SpecsSystem Spec
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 computer won't start after replacing psu




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