[Gllug] Computer won't turn on

[Sanatan Rai]

> On Fri 03 Dec, general_email at technicalbloke.com wrote:
>>
>
>>
>> Also, check your fans are all spinning up too, dead/stuck fans can cause
>> the same problem. On desktop machines it's very rare for a CPU fan not
>> to come on at power on time by design - I've only ever seen that on one
>> model of IBM so if it doesn't spin you might have found your culprit. If
>> it doesn't spin then heating it with a hairdryer for a minute will
>> sometimes get it going again but you'll need to replace it in the long term!

     The CPU fan does start---briefly---and then the system cuts
out again. So what happens is the following:

   1 PSU switch at the back is on
   2 Press on button at the front of the computer: nothing happens
   3 Toggle PSU switch on--> off --> on
   4 Press on button at the front of the computer, fans start spinning,
      I see the light under the front button turn on, then the system
      powers down in seconds. The CPU fan does not reach full
      speed---I think all this happens in under 5 seconds.
   5 We're back in state 1

     This suggests to me that the problem is with the PSU. I don't
have much experience with these faults, but I am optimistically
guessing that the mother board and other bits and bobs are ok.

      At this point I think I'll try a new PSU.


--Sanatan



-- 
Sanatan Rai
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London, SE1 2LJ.
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