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: Computer gets power, shuts off, gets power, repeats, never boots

29 Nov 2011   #11
450125

Win7 Professional 64
 
 

Quote   Quote: Originally Posted by Tews View Post
Dont overlook a wonky power supply while you're at it...
I'm comfortable with the power supply. We swapped my PS into another computer and it worked fine; swapped a known good PS into mine and the same problem happened.


My System SpecsSystem Spec
.
04 Dec 2011   #12
450125

Win7 Professional 64
 
 

Just another update.

New motherboard arrived yesterday. Put it in - and same behavior. And we tried resetting the CMOS on the new and old MB. Have now tried two MB's, permutated each possible way with two PS's, both of which are known to work, and same behavior each time.

Finally for grins (of which I've had few lately), we tried pulling the processor (Intel I3 550) out and firing it up - and the same behavior there. So based on that - the fan cycles on and off about 2-3 seconds a pop, but we never hit the bios screen or anything - plus some googling, we're suspecting it's the processor, which is fortunately covered under warranty.

Stay tuned for more once a new processor arrives.

BTW, other things that were tried and didn't work included disconnecting the restart switch (to eliminate possibility of a short causing this), and doing this all with the MB not mounted in the case, isolated on a piece of cardboard, again just in case some shorting was going on.
My System SpecsSystem Spec
22 Dec 2011   #13
450125

Win7 Professional 64
 
 

I am happy to finally close this thread out.

For the record, what happened was:
  • The original processor blew, taking the MB with it (or maybe it was the other way around - no way of me telling)
  • Replacement MB did not work (thought MB was the original cause)
  • RMA'd the processor, stupidly put new processor in original MB (since thought original MB was good, and wanted to keep as close as possible to original configuration), and that didn't work
  • Put new processor in replacement MB and could boot, but system would just shut down to black in minutes
  • Blamed memory and replaced that
  • Same problems
  • Had a computer shop look at things, and after some trial and error, they put a "new new" processor into replacement MB on a system they built, and they could boot to Windows and sustain a session
  • So I now have my computer back with the replacement motherboard, the replacement replacement processor, new memory that I had not needed (but 8 gigs now instead of 4) and it's working fine, 24 days after the problem started. Total expenditure was $50 for MB off eBay (dumb, as original was covered under warranty), $50 for two expedited warranty cross-ships of processors, $40 for new memory, and $50 for computer shop to run diagnostics on all my HW. Annoying, but good to be back where I wanted to be.
For the record, although MB and processor are the same brand and rev as the originals, Windows did ask me to activate when I first successfully logged in after putting the pieces together again. I was able to activate in 30 seconds or less using the least-intrusive "Activate online" option.

I'm marking the thread solved. At long last.
My System SpecsSystem Spec
.

Reply

 Computer gets power, shuts off, gets power, repeats, never boots




Thread Tools Search this Thread
Search this Thread:

Advanced Search




Similar help and support threads
Thread Forum
Computer shuts down like power outtage, Kernel Power Error ID 41
Recently I installed a new game on my computer (Far Cry 3), and after a while playing it, my computer suddenly shut down, just like a power outtage (except the power was not out). After debating with friends, I went more towards a hardware problem rather than a software problem, so I thought...
BSOD Help and Support
Shut down computer, remove all power sources, hold down power button
Why does shutting down the computer, removing the AC Adapter, removing the battery (if it is a laptop), and holding down the power button for 30 seconds fix problems in one's computer. I was recently corrected in a post of mine that this does not actually do anything unless one removes the 3 volt...
Hardware & Devices
Windows shuts down but power stays on
Hello everyone, I'm have an issue with my recently built PC (recent as in built 3 days ago). I have a brand new copy of Windows that was freshly installed and once the installation completes and I enter Windows desktop before I even install any drivers or programs if I try to shutdown the PC...
General Discussion
Computer wont power on after power loss
My computer wouldn't shut down, even with holding in the power button, and so I just let it run out the battery. Then it wont turn on. I tried holding down the power button to clear out any charge that might be remaining. I have managed to get it back on, but I have to make a connection at the...
Hardware & Devices
Windows Only Boots After Power Drained
Hi everyone, I have a problem that I hope you can help me out with here. Windows only boots after I drain the power from my PC. In other words, if I want it to run, I need to shut off my PSU, hold the power button, then turn it back on. Yet another strange thing is that I need to mash the BIOS...
BSOD Help and Support
New build starts to power on, then shuts down...
So, pretty much all I did was take the hardware in my specs and move it to another case. Now, it will power on, start up the CPU fan, spin the hard drive and CD Rom and then power off. I've checked the PSU and that's not the issue, I've tested almost all of the components except for the CPU. Any...
PC Custom Builds and Overclocking


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 09:33.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App