Simviation Forums

Some of you may recall the CPU frying itself awhile back in my PC, and I replaced the CPU today.  However, I switched the power on and nothing.

Hopelessly feeling powerless.

I suspect the CPU damaged the motherboard when it went kablooie.  Any other ideas?

I'm sorry to hear about your cpu and possibly the motherboard...If you get absolutely nothing... no power on self test (POST) then maybe the problem is in the power supply. The processor won't get any power until the POST checks for stability and proper voltage. Do PS's come with fuses or breakers? Just a thought...

It is not the PSU.

600 watts.

'Tis possible that the mobo went due to the heat.  Could've melted the socket or something like that.

How did you KNOW that it was the CPU in the first place?


As to the power supply........ did you put a multimeter on the various outputs to see if they are indicating the correct voltage?  Of course, that would not tell you if the voltage is correct under load conditions.... but it is a start.

best,

.................john

Because a small wisp of smoke came right out of the CPU fan.

I'll use some of my dad's tools to see if it really is the PSU.  He has this strange thingy, where you put whatever you're measuring in between two pincers and it'll tell you the output.

Can a CPU really damage other parts of the PC when it goes out?  Like the PSU or the graphics?

Because a small wisp of smoke came right out of the CPU fan.

Well that is a pretty good indication you likely fried it, I'd say.

Drats.

PSU: 12v, 3,3v and 5v output... the difference is in the available load.

You need to do a trick with some of the connector pins to get the PSU to switch from standby to running mode, or you will only find the 5v standby power

[quote].....I'll use some of my dad's tools to see if it really is the PSU.

Good Point Fozzer!  

In fact.... we should probably mention her that inside that case ,....... although it is not easy to find.... can be some voltages that could be lethal.

So be caredul there Scorpion.  MOST stuff in the case is low voltages.... but the power supply "inner workings" is another story.

You really probably don't want to go poking around inside the PS box.  ;)

best,

...................john

I don't plan to be poking inside the Pandoras Supply box anytime soon.

You just have to know your limits.

heres a good link for PSs:

http://web2.murraystate.edu/andy.batts/ ... SUPPLY.HTM

Scorpion, have you got an old mobo & PSU to test your individual components? it indeed sounds to me like the PSU is dead, worryingly, it could be the reason your 1'st cpu went bang!

I'd slip your local PC store a few $ to test the PSU before (which it seems too late ,as you've tried the new cpu already...? ) you re-assemble the pc.

also, remove the mobo battery (to clear the CMOS RAM). I've found this helped me get back a mobo that had died after an extreme overclock.

Did what we discussed work then???  ;)

I haven't done any overclocking, but I'll try the battery anyway.

I can say it's not my hard drive or graphics card, because I'm using them both on the old PC right now.  (drive as slave) It can now only be the MOBO, RAM or PSU.  As I'm using the graphics and drive, and the CPU is brand new.

The best I can hope for is it being the PSU, despite being new.  A new PSU is a lot cheaper than a new MOBO.