Computer start- up problem

  Snrub 19:35 11 Jul 2009

I have a computer start problem. The computer is just 'dead' when the start up button is pressed. If the on-off switch at the rear of the computer is switched on and off and on again, a hum / buzzing noise is heard which increases in pitch continually over a period of about 10-15 minutes. When this buzzing stops the computer on button at tne front of the computer works as normal. It is though some 'safety cut-out' is being re-energised before the power supply swiches on.
I'm thinking it is either the battery failing on the Processor Board or Power Supply starting to fail. Definately a hardware problem. The computer is 7 years old.
Has anyone had same problem please?

  baldydave 20:19 11 Jul 2009

Faulty Psu (power supply unit) very common problem.
The psu does not re energise it should work straight away,sounds like yours has a faulty component/dry solder joint which when warms up makes contact and then works.
Not a repairable item,just replace with one of the same wattage(on label)or higher wattage.
Normally held in by 4 screws on the back of the pc and unclip cables inside pc,remembering where they go,if you feel comfortable doing this it takes about 10 mins.
try here
click here
click here

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