computer not starting

[cja70]

i have a intel P4 2.8 ghz dual core few days back a burnt smell was coming , now the com is not starting whats the problem is it the power unit , previously the display used to show check signal cable

 

[JOHNN93]

thats nasty.
a capacitor might have blown.
there is a realy good possibility the gpu or motherboard is defect.
quite hard to tell on the little deatail provided.

 

[cja70]

thanks for the reply, can you tell me what other information u need to come to aconclution

 

[JOHNN93]

does the power supply work?
to test jump the green with the black wire and with a multimeter check voltages.smell the power supply if the is a burnt odor smell coming from it.
do a physical check to see if the capacitors are not damadged blunt on top or blown.
voltages on the power supply should be
3.3 v orange
5v red
12v yelow
-12v blue

 

[cja70]

i had opened the power unit i found that something is burnt and some transparent gel dried on the circuit board of the power unit

 

[cja70]

when the power is switched on there is no display on the screen. on the mother board there is a green light on. when i try to switch the power on no response of the system booting.

 

[JOHNN93]

the trnsparent gel is glue dot wory about that.
that exactly is burned?
capacitor?

diodes?

resistor?

or voltage regulator?

 

[JOHNN93]

did you check the capacitors on the mothrboard gpu?

 

[cja70]

should i install a new power unit

 

[JOHNN93]

yes you should.
although check capacitors on the motherboard gpu to determne that this is not the only problem.

 

[cja70]

the capacitors on the mother board are ok

 

[JOHNN93]

its only the power supply chose the same or greater wattage power supply so everything works optimal.power supplys have the most fail % of all components in the computer.

 

[cja70]

thanks for the help
bye take care