Broken motherboard or CPU?

  • Thread starter Thread starter ss6nn1
  • Start date Start date
S

ss6nn1

I had to remove the water cooling kit from a Socket939 machine but the
CPU came off with the water cooling CPU block because of the sticky
paste while the lever was still down, it looks like the pins are not
broken or bent and fits in again with the old heatsink on top of it.

Result:
1) Turn on PC
2) No beep
3) CPU fan spinning
4) HD spinning
5) Light in front is on but HD activity light isn't flashing
6) Monitor shows "No signal"
7) Forced to press the ON button for 5 seconds to shut down machine

What could be the problem?
What can I do to check whether it's a CPU or Motherboard problem?

TIA
 
I had to remove the water cooling kit from a Socket939 machine but the
CPU came off with the water cooling CPU block because of the sticky
paste while the lever was still down, it looks like the pins are not
broken or bent and fits in again with the old heatsink on top of it.

Result:
1) Turn on PC
2) No beep
3) CPU fan spinning
4) HD spinning
5) Light in front is on but HD activity light isn't flashing
6) Monitor shows "No signal"
7) Forced to press the ON button for 5 seconds to shut down machine

What could be the problem?
What can I do to check whether it's a CPU or Motherboard problem?
Click to expand...

Very little, other than try the CPU in a different motherboard and/or try a
different CPU in that board.

You could try resetting the BIOS with the backup jumper first though - you
never know your luck...

I've had CPU's wrenched out when people have removed heatsinks and generally
(and maybe surprisingly) they survive.. but it ruins the CPU socket and
writes off the motherboard.
 
I had to remove the water cooling kit from a Socket939 machine but the
CPU came off with the water cooling CPU block because of the sticky
paste while the lever was still down, it looks like the pins are not
broken or bent and fits in again with the old heatsink on top of it.

Result:
1) Turn on PC
2) No beep
3) CPU fan spinning
4) HD spinning
5) Light in front is on but HD activity light isn't flashing
6) Monitor shows "No signal"
7) Forced to press the ON button for 5 seconds to shut down machine

What could be the problem?
What can I do to check whether it's a CPU or Motherboard problem?

TIA
Click to expand...

My bet is that the motherboard has been damaged. If it were a CPU
problem, you'd probably be getting some error code beeps from the
motherboard. And I've had your exact symptoms every time I've had a mb
go doa (power to fans and drives, but no beeps - and no signal to
monitor).
 
I had to remove the water cooling kit from a Socket939 machine but the
CPU came off with the water cooling CPU block because of the sticky
paste while the lever was still down, it looks like the pins are not
broken or bent and fits in again with the old heatsink on top of it.

Result:
1) Turn on PC
2) No beep
3) CPU fan spinning
4) HD spinning
5) Light in front is on but HD activity light isn't flashing
6) Monitor shows "No signal"
7) Forced to press the ON button for 5 seconds to shut down machine

What could be the problem?
What can I do to check whether it's a CPU or Motherboard problem?

TIA
Click to expand...

if the cpu pins look fine, the cpu is probably fine too.

It's possible the stress pulled the core up and ripped it
partway away from the carries but I doubt it.

Unplug the AC to the PSU and clear the motherboard CMOS. If
that doesn't help then inspect the whole system- maybe while
removing the CPU you had loosened some cables or cards and
they need re-seated. Otherwise, strip the system down to
bare essentials- CPU, heatsink/fan, 1 memory module, video.
Clear CMOS again and then reconnect AC power and try it.

You might be able to pry off the socket top and inspect the
pin connections. I've not done that on a 939 board yet and
you could damage the socket trying to do it... but if the
board were going in the trash anyway, it might be worth
looking into.
 
if the cpu pins look fine, the cpu is probably fine too.

It's possible the stress pulled the core up and ripped it
partway away from the carries but I doubt it.

Unplug the AC to the PSU and clear the motherboard CMOS. If
that doesn't help then inspect the whole system- maybe while
removing the CPU you had loosened some cables or cards and
they need re-seated. Otherwise, strip the system down to
bare essentials- CPU, heatsink/fan, 1 memory module, video.
Clear CMOS again and then reconnect AC power and try it.

You might be able to pry off the socket top and inspect the
pin connections. I've not done that on a 939 board yet and
you could damage the socket trying to do it... but if the
board were going in the trash anyway, it might be worth
looking into.
Click to expand...
If the CPU isn't at least warm to the touch after you turn the pc off,
then either the CPU was damaged. Test with another compatible CPU you
know works. If the CPU is stone cold than the socket was damaged and
the pins aren't making contact with the motherboard. Test the CPU in
another compatible motherboard.

Here's a tip when removing heatsink from CPU. The bond with the thermal
media can be loosened by gently but firmly moving the heatsink from side
to side. Treat it with care and the heatsink will come off without
causing the CPU to be yanked out of the socket.

--
________
To email me, Edit "blog" from my email address.
Brian M. Kochera
"Some mistakes are too much fun to only make once!"
View My Web Page: http://home.earthlink.net/~brian1951
 
Brian said:
If the CPU isn't at least warm to the touch after you turn the pc off,
then either the CPU was damaged. Test with another compatible CPU you
know works. If the CPU is stone cold than the socket was damaged and
the pins aren't making contact with the motherboard. Test the CPU in
another compatible motherboard.
Click to expand...

I took of the heatsink and fan from the CPU and turned the machine on
for 30 seconds and switched it off, the CPU was _hot_, however no
signal to monitor or beep.

Don't have any other Socket939 machines or CPU to try unfortunately.

I tried taking out the battery to clear the CMOS for 15mins but didn't
make a difference.
 
If the CPU isn't at least warm to the touch after you turn the pc off,
then either the CPU was damaged.
Click to expand...

Or what - you can't use 'either' and not offer an alternative - methinks you
didn't finish the sentence! ;o)
 
I took of the heatsink and fan from the CPU and turned the machine on
for 30 seconds and switched it off, the CPU was _hot_, however no
signal to monitor or beep.
Click to expand...

I can't believe you just did that.

Do not ever turn on a system without the heatsink on it.
You may have NOW damaged the CPU, might now have two dead
pieces of gear instead of one.
 
kony said:
I can't believe you just did that.

Do not ever turn on a system without the heatsink on it.
You may have NOW damaged the CPU, might now have two dead
pieces of gear instead of one.
Click to expand...
Not for 30 seconds.
 
Don Freeman pretended :
Not for 30 seconds.
Click to expand...

Maybe not with a socket 969 CPU, but with one of the earlier socket
Athlon's in the 1GHz speed region: Hello Smoke, Bye Bye CPU.
 
Don said:
Not for 30 seconds.
Click to expand...

Umm.. Depending on the cpu, 30 seconds can be more then enough time to
fry it... You don't see many computers waiting 30 seconds when they
notify you the cpu fan isn't spinning before mandatory shutdown. :)
Their's a reason for this.

if the OP is curious about the board, remove all cards, ram, etc. and
try to power it on. If it doesn't respond, IE doesn't notice it has no
ram in it, the board is probably shot.
 
sloblocks wrote on 26/07/2006 :
Don Freeman pretended :

Maybe not with a socket 969 CPU, but with one of the earlier socket Athlon's
in the 1GHz speed region: Hello Smoke, Bye Bye CPU.
Click to expand...

...or even 939 :o)
 
Maybe not with a socket 969 CPU, but with one of the earlier socket
Athlon's in the 1GHz speed region: Hello Smoke, Bye Bye CPU.
Click to expand...


yes with skt 939, or various P4. The heat spreader will not
help enough, nor can the thermal throttling/shutdown work
this fast (from a cold-off to a on-but-no-sink condition).
 
Yes, in as little as a single-digit # of seconds it will fry
a semi-modern CPU.
Click to expand...

After just bench-testing four P4 motherboards, one of which was dead,
with two 2.4's and a 3.2, all Northwoods, the method I used was to
place the cooler - no compound and unclipped but fan attached to
header - on the chip as I went into the CMOS. The chips and sink base
were clean, but not lapped.
The chips all measured a normal 80-90 F in CMOS and didn't change for
the few minutes of testing.
Out of curiosity I once put power to an unprotected 2.4 chip for 3-4
seconds, cut power, and touched the chip. It was hot, maybe 150 F.

--Vic
 
Back
Top