Power Supply fried!

[JEDORI]

Have a "no-name" Pentium 4 1.5 ghz. The Power Supply went out so I replaced it with a better more powerful one. Everything was connected correctly when I switched it on... Smell of smoke... The fan turned on, the power sequence started and then died. Now when I turn on the PC the fan doesn't come on and the CPU fan kind of clicks. Any hints? I think there may be a short somewhere. Remove the cards? There's only a Modem, NIC and Video card with a 400 watt PS.


Jeff

 

[diogenes10]

A couple of years ago I came into work and found my power supply not working, replaced it, the new one immediately went bad - I took it to shop they found bad video, hard drive and powersupply. Apparently the bad video or hard drive cooked my second power supply. Based on that experience I'd guess you've got another bad component, but I've no idea how to tell you to test safely for what it is.

 

[franklin97355]

Take everything off the motherboard and see if the fans spin with nothing but the MOBO connected.

 

[antialias]

Hi,
There could be some reasons:
1) A short circuit in motherboard
2) The connection between MoBo. and PS. isn't good/not fully plugged.
3) Electricity Values are not stable. eg. instead of 110/230V it will sometimes increase to 150/300V which could be very harmful if there is no electrical protection.
4) The setting behind the PS. is wrong. For example, you use 110V system but PS's default set is 220V.
5) There is a production error. eg. the cover of wrapped wires of inductors could be gone so the inductance values can be changed and more current could be flow on your components which will probably burn your PS.
6) A component that drains more power from your PS, but its a low probability bec. all of the PS. can handle big currents. However, electronic components work with small currents(uA or mAs)

Try replacing PS. If it doesn't work try replacing your motherboard.

Hope it works
Good Luck

 

[diogenes10]

Perhaps it's time for the hidden dos commands!

http://web.thock.com/humour/undoc_dos.shtml

 

[diogenes10]

jedori -- with apolgies -- I know your situation is serious to you, the threads on dos commands got me started, this turned up, and I remembered your thread.
I hope you are able to get your issue resolved.

 

[JEDORI]

Thank you all for your response! I believe it is the MB! I smeel the smell of smoke when just the MB is plugged in. Bought a used one to test it....

Again, thanks!!!


Jeff