10-03-2004, 21:38
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#1
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Inactive
Join Date: Jun 2003
Location: Middleton North West Manchester
Services: up to 30 MEG CF version of Peter Kay
Posts: 1,871
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help PC trouble
Lads pc has packed up but still has led lit on the board, was thinking it was the power supply its a kt133 board any ideas .
Fan not turning so help appreciated
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10-03-2004, 21:44
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#2
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Inactive
Join Date: Jun 2003
Location: Warrington ntl:81304 Altitude: 12m (and falling)
Posts: 4,499
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Re: help PC trouble
p'raps the fan's died...
...causing the CPU to overheat and the board to shut down to protect it
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10-03-2004, 21:47
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#3
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Inactive
Join Date: Jun 2003
Location: Middleton North West Manchester
Services: up to 30 MEG CF version of Peter Kay
Posts: 1,871
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Re: help PC trouble
Quote:
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Originally Posted by altis
p'raps the fan's died...
...causing the CPU to overheat and the board to shut down to protect it
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good idea worth trying gets spare fan
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10-03-2004, 21:54
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#4
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Inactive
Join Date: Jun 2003
Location: Middleton North West Manchester
Services: up to 30 MEG CF version of Peter Kay
Posts: 1,871
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Re: help PC trouble
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Originally Posted by th'engineer
good idea worth trying gets spare fan
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did not work led is lit on the board
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10-03-2004, 22:11
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#5
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Guest
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Re: help PC trouble
Quote:
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Originally Posted by th'engineer
Lads pc has packed up but still has led lit on the board, was thinking it was the power supply its a kt133 board any ideas .
Fan not turning so help appreciated
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have you seen
this?
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11-03-2004, 15:30
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#6
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Inactive
Join Date: Jun 2003
Location: Warrington ntl:81304 Altitude: 12m (and falling)
Posts: 4,499
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Re: help PC trouble
Fans use the 12V supply and I would guess that the LED is powered from 5V. It is possible that the 12V has failed but the 5V has not. Locate a spare disk drive connector and stuff your voltmeter in there. The two black wires in the middle are 0V, the red wire is +5V and the yellow is +12V. If you see one supply but not the other then the PSU is probably stuffed.
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11-03-2004, 15:46
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#7
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Inactive
Join Date: Oct 2003
Location: cyprus
Posts: 510
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Re: help PC trouble
I would check the power supply as well. Have had exactly same symtops here (mb led lit but no other 'action' from the board. Change power supply and all was ok again.
Good luck
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11-03-2004, 15:48
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#8
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Inactive
Join Date: Jan 2023
Posts: 4,984
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Re: help PC trouble
It would laso be worth re-seating the cards and ram. Loose components can stop the board posting.
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11-03-2004, 16:25
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#9
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Inactive
Join Date: Feb 2004
Location: Luton
Age: 46
Posts: 199
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Re: help PC trouble
hmm....
my other system did this when the cpu was fried.... is the internal speaker connected? does it beep when you turn on?
could be one of many things causing it.
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11-03-2004, 18:33
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#10
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Inactive
Join Date: Jun 2003
Location: I am house...
Services: $KY+HD - BT Infinity
Posts: 2,284
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Re: help PC trouble
I would guess at the PSU, my mothers blows about every 9 months (god knows what shes doing!) and her light stays on on the motherboard. Go spend £20 (MAX) on a new PSU and get installing (some dealers will let you take em back if it wasn't that).
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11-03-2004, 20:06
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#11
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Inactive
Join Date: Jun 2003
Location: Warrington ntl:81304 Altitude: 12m (and falling)
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Re: help PC trouble
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Originally Posted by Tricky
I would guess at the PSU, my mothers blows about every 9 months (god knows what shes doing!) and her light stays on on the motherboard. Go spend £20 (MAX) on a new PSU and get installing (some dealers will let you take em back if it wasn't that).
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£20 max! No wonder they only last 9 months.
When designing a power supply, it is common to put in something called a crowbar to protect the outputs. This simple circuit measures the output voltage and if, for any reason, it gets too high it tries to short-circuit the output. Of course, if you're designing down to a price then you forget about the crowbar. Which is fine until the day you get a spike down the mains, the output jumps and then takes out some of the electronics. This happened to my brother and it permanently zapped his hard disk drive 
I would never skimp on the PSU.
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11-03-2004, 20:52
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#12
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Inactive
Join Date: Oct 2003
Location: cyprus
Posts: 510
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Re: help PC trouble
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Originally Posted by altis
I would never skimp on the PSU.
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Have to agree. False economy imo. CHeap / poor powers supply can cause all sorts of problems and can even damage other components. Not an area I wouls skimp on myslef.
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11-03-2004, 23:50
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#13
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Inactive
Join Date: Jun 2003
Location: Middleton North West Manchester
Services: up to 30 MEG CF version of Peter Kay
Posts: 1,871
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Re: help PC trouble
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Originally Posted by erol
Have to agree. False economy imo. CHeap / poor powers supply can cause all sorts of problems and can even damage other components. Not an area I wouls skimp on myslef.
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Right New PSU on order tobe delivered saturday had a hunch it might be psu and dvm confirmed it bwill let you all know lateston saturday.
I appreciate all the help
BTW lad on P166 pc  that will teach him 
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