CPU change fries motherboard???

[Seth Brundle]

Today I brought two of my PCs down in exactly the same way, a way I have
never damaged a PC in 12+ years of building over 24 PCs...maybe Ive just
been lucky...

Anyways, the first PC was an original ECS K7S5A running an XP 1700+.
I figured I could run an XP 2400+ 266 FSB CPU in there, or at least try.
Well, I installed it, and it wouldnt post - fans run, no beeps.
So I dropped in the old 1700+ - SAME THING!??

I have never heard of having a CPU permanently damage a motherboard - is
this possible?
Well, I may have done it twice!

I went home, where I went to upgrade my ASUS A7V8X-X from a similar XP 1700+
to a 333MHz XP 3000+.
The same exact thing happened - except that I do get a continuous repeat of
long beeps.
Unfortunately, the manual has no guide to beep codes *(&#)$&^)#*^.
I reseated RAM and connected video, to no avail.

And, of course, the old CPU exhibited the same problem when replaced.

I noticed that on the motherboard, it reads 'Socket 462' - is this the same
as Socket A?
Because when I purchased the motherboard and CPUs I specified Socket A and
all the CPUs fit.

Anyone know what is going on here?

I have never had this happen - a CPU fit the motherboard perfectly and
damages it.
I have had the CPUs not work as they were unsupported, but never damage the
board permanently.
I recently upgraded 3 of my ECS AMD servers from 1700+ to 2400+ with no
problem whatsoever.

 

[JAD]

When I run into panicky things as this the first thing I do is clear
the cmos, since you didn't mention trying this I thought I would. I am
not familiar with the voltage requirements of each of those amd's, and
whether or not that the board has auto voltage sensing, but I would
double check that.

 

[Seth Brundle]

Thanks for the tip - didnt work though

When I run into panicky things as this the first thing I do is clear
the cmos, since you didn't mention trying this I thought I would. I am
not familiar with the voltage requirements of each of those amd's, and
whether or not that the board has auto voltage sensing, but I would
double check that.

 

[Roger M]

Thanks for the tip - didnt work though

Unplug it from it power source for a minute or so. Worked for me.





Roger

 

[Seth Brundle]

For the second box, it was the RAM.
I swapped the RAM with some from another machine and it booted fine.

Absolutely NFI why changing a CPU would permanently damage brand new
Kingston RAM.

 

[Martin]

For the second box, it was the RAM.
I swapped the RAM with some from another machine and it booted fine.

Absolutely NFI why changing a CPU would permanently damage brand new
Kingston RAM.

Is your PSU up to snuff?

Not a lot of extra amps in changing CPU, but some...

Martin

 

[Seth Brundle]

Hmmm...maybe but I doubt it.
Its a 350w generic PS.
Besides the 1700 didnt work when i put it back either...

thanks for tip though!