Bizarre Problem ...
Page 1 of 1
headshot
VIP Member



Posts: 35323
Location: UK
PostPosted: Fri, 10th Mar 2006 12:18    Post subject: Bizarre Problem ...
I have a PC that starts up as soon as the power cable is connected to the PSU. Nothing appears on the monitor and there are no beeps from the PC either. I have changed the PSU thinking it was most probably dodgy but the same thing occurs! Everything is on board with the exception of a 56k modem and I have removed that but to no avail. I have disconnected the front panel header connectors and I am fast running out of ideas! Anyone know what could be causing this or seen this problem before? I have tried Googling it but I am unable to be specific enough to find produce any decent results. I guess I could try the booting outside the case and probably change the memory. Other than that it must be a defective CPU and/or motherboard.

Any help or suggestions would be greatly appreciated thanks.


May the NFOrce be with you always.
Back to top
skidrow
Moderator



Posts: 8691

PostPosted: Fri, 10th Mar 2006 12:25    Post subject:
the pc start and the fans are turning?

http://www.pchell.com/hardware/beepcodes.shtml
No beep Power supply or system board problem
----
http://www.pcstats.com/articleview.cfm?articleID=1223
No Beeps Short, No power, Bad CPU/MB, Loose Peripherals

or
http://forums.devshed.com/computer-hardware-103/computer-not-booting-monitor-blank-no-beeps-323980.html


Back to top
headshot
VIP Member



Posts: 35323
Location: UK
PostPosted: Fri, 10th Mar 2006 12:55    Post subject:
skidrow wrote:
the pc start and the fans are turning?

http://www.pchell.com/hardware/beepcodes.shtml
No beep Power supply or system board problem
----
http://www.pcstats.com/articleview.cfm?articleID=1223
No Beeps Short, No power, Bad CPU/MB, Loose Peripherals

or
http://forums.devshed.com/computer-hardware-103/computer-not-booting-monitor-blank-no-beeps-323980.html


Yep the first thing I notice is the CPU fan spinning.
Definitely not a PSU issue since I already tried a brand new one on it.

Will check the links thanks.


May the NFOrce be with you always.
Back to top
deelix
PDIP Member



Posts: 32062
Location: Norway
PostPosted: Fri, 10th Mar 2006 12:59    Post subject:
Just the same happend to me, but only when i was turning on the PC. Happends randomly =\
I don't think my problem is hardware tho, because if it was it wouldn't happen SO randomly as it does for me.
Back to top
pancake




Posts: 1091
Location: England
PostPosted: Fri, 10th Mar 2006 14:56    Post subject:
can you boot the pc to windows? if so let it shutdown properly after, i had a pc that used to restart itself if it wasnt shutdown properly.
Back to top
whoKnows
VIP Member



Posts: 2972

PostPosted: Fri, 10th Mar 2006 15:04    Post subject:
Remove all memory from the board to check if it beeps then. If it doesn't it could be that the board died or it is short-circuited. Check if any loose screws or metal parts are between the board and the backside of the case, although it should turn off power right away if it would be short-circuited.
Back to top
headshot
VIP Member



Posts: 35323
Location: UK
PostPosted: Fri, 10th Mar 2006 15:20    Post subject:
Ok I have the board outside of the case with nothing whatsoever in it or connected other than a 400W new PSU and the P4 CPU. Memory is out. There are no beeps. I connect a power cable to the PSU, both fan starts and nothing is on screen. It will not POST at all.

Chances are the board is at fault and replacing it will probably fix the problem. I would think its gonna be the board rather than the CPU, at a guess anyway.

I just took the CPU out and tried again. The PSU fires up straight away and Im fairly certain its not supposed to! It must be a defective motherboard.


May the NFOrce be with you always.
Back to top
deelix
PDIP Member



Posts: 32062
Location: Norway
PostPosted: Fri, 10th Mar 2006 15:51    Post subject:
whoKnows wrote:
Remove all memory from the board to check if it beeps then. If it doesn't it could be that the board died or it is short-circuited. Check if any loose screws or metal parts are between the board and the backside of the case, although it should turn off power right away if it would be short-circuited.

Well, that could be it... some metal parts from my pc fall inside once.. haven't checked where it landed =\
Back to top
headshot
VIP Member



Posts: 35323
Location: UK
PostPosted: Fri, 10th Mar 2006 15:53    Post subject:
deelix wrote:
whoKnows wrote:
Remove all memory from the board to check if it beeps then. If it doesn't it could be that the board died or it is short-circuited. Check if any loose screws or metal parts are between the board and the backside of the case, although it should turn off power right away if it would be short-circuited.

Well, that could be it... some metal parts from my pc fall inside once.. haven't checked where it landed =\


Oh right, was he replying to you? I see you have hijacked my thread with your similar problem lol.


May the NFOrce be with you always.
Back to top
Mortibus




Posts: 18053
Location: .NL
PostPosted: Fri, 10th Mar 2006 16:36    Post subject:
headshot wrote:
Ok I have the board outside of the case with nothing whatsoever in it or connected other than a 400W new PSU and the P4 CPU. Memory is out. There are no beeps. I connect a power cable to the PSU, both fan starts and nothing is on screen. It will not POST at all.

Chances are the board is at fault and replacing it will probably fix the problem. I would think its gonna be the board rather than the CPU, at a guess anyway.

I just took the CPU out and tried again. The PSU fires up straight away and Im fairly certain its not supposed to! It must be a defective motherboard.

mobo fukedup period,u'll be lucky if it didnt took along with it cpu & ram
edit;damn u are lucky Razz


Last edited by Mortibus on Fri, 10th Mar 2006 16:37; edited 2 times in total
Back to top
headshot
VIP Member



Posts: 35323
Location: UK
PostPosted: Fri, 10th Mar 2006 16:36    Post subject:
Changed the board and its working again! Just gotta do an XP repair since it is a different chipset. Thanks to all who replied Very Happy

Edit: lol I dont freakin believe it! I left the PC doing its XP repair. Went back to check on it a short time later and it had turned off and wouldnt turn back on! I took the board out of the case again and the goddamn thing is as dead as a dodo! FFS! Evil or Very Mad


May the NFOrce be with you always.
Back to top
Page 1 of 1 All times are GMT + 1 Hour
NFOHump.com Forum Index - Hardware Zone
Signature/Avatar nuking: none (can be changed in your profile)  


Display posts from previous:   

Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB 2.0.8 © 2001, 2002 phpBB Group