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PC won't boot after processor change

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Anonymous
a b V Motherboard
November 15, 2004 12:56:12 PM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

Hi there

I would be very grateful for any advice. My hubby's PC is broke and he is
almost at the stage of throwing it in the pond so I'm gonna have a go at
fixing it today whilst he's in work.

It's a A7N8X-E Deluxe mobo, which was quite happily running an Athlon 2400+
until hubby decided that he'd rather the 2800+ from my machine (he's got
PC3200 memory but mine's only PC2100 so can't utilise the full speed of the
2800+).

The 2800+ has always run fine in my machine (which has a A7N8X-X mobo), and
is no running fine with hubby's ex-2400+. But when he put my 2800+ into his
machine, it seems to have killed it.

When you turn it on, the fans come on, but the processor doesn't seem to
spin up and it doesn't activate the monitor, or put any lights on the
keyboard or anything. I've unplugged the HDDs now, just in case, and I've
also tried booting it without the RAM, but it's still the same.

Full specs of the machine, in case they're relevant:
Mobo: A7N8X-E Deluxe
Processor: Athlon 2800+ (Barton 2.083GHz)
Arctic Copper Silent CPU fan
450W PSU
Radeon 9800 Pro 128MB Graphics card
2 x 512MB PC3200 RAM

He's tried resetting the CMOS, and that didn't help.

Any suggestions would be very gratefully received.

Many thanks
xena

More about : boot processor change

Anonymous
a b V Motherboard
November 15, 2004 2:44:07 PM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

"xena" <10074317@spamtrap.ac.uk> wrote in message
news:2vrcp2F2o7obhU1@uni-berlin.de...
> Hi there
>
> I would be very grateful for any advice. My hubby's PC is broke and he is
> almost at the stage of throwing it in the pond so I'm gonna have a go at
> fixing it today whilst he's in work.
>
> It's a A7N8X-E Deluxe mobo, which was quite happily running an Athlon
> 2400+ until hubby decided that he'd rather the 2800+ from my machine (he's
> got PC3200 memory but mine's only PC2100 so can't utilise the full speed
> of the 2800+).
>
> The 2800+ has always run fine in my machine (which has a A7N8X-X mobo),
> and is no running fine with hubby's ex-2400+. But when he put my 2800+
> into his machine, it seems to have killed it.
>
> When you turn it on, the fans come on, but the processor doesn't seem to
> spin up and it doesn't activate the monitor, or put any lights on the
> keyboard or anything. I've unplugged the HDDs now, just in case, and I've
> also tried booting it without the RAM, but it's still the same.
>
> Full specs of the machine, in case they're relevant:
> Mobo: A7N8X-E Deluxe
> Processor: Athlon 2800+ (Barton 2.083GHz)
> Arctic Copper Silent CPU fan
> 450W PSU
> Radeon 9800 Pro 128MB Graphics card
> 2 x 512MB PC3200 RAM
>
> He's tried resetting the CMOS, and that didn't help.
>
> Any suggestions would be very gratefully received.
>
> Many thanks
> xena

Aw, this is so frustrating...!
I really don't want to put the processor back in mine or flash from mine
except as a last resort in case this one breaks too and we won't be able to
get on the net for advice then!! Plus I got an assignment to be in on Weds!

I've just put the 2800+ processor in another board that we had lieing around
(ASRock K7S8X) and it's exactly the same, which points to a processor fault
I guess. Are they really that fragile that taking it out of my PC and
putting it in hubby's could kill it?

I've dug out my old Athlon 1333 and am just about to put it into hubbys
A7N8X-E Deluxe mobo to see if the mobo still works.

I've been scouting around on the net and it looks like these mobos have a
bad habit of dying :-(

Thanks for the help so far!
xena
Anonymous
a b V Motherboard
November 15, 2004 3:05:28 PM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

"xena" <10074317@spamtrap.ac.uk> wrote in message
news:2vrj2pF2n3gvtU1@uni-berlin.de...
>
> "xena" <10074317@spamtrap.ac.uk> wrote in message
> news:2vrcp2F2o7obhU1@uni-berlin.de...

> I've dug out my old Athlon 1333 and am just about to put it into hubbys
> A7N8X-E Deluxe mobo to see if the mobo still works.

Aw :'( 
That's not working either.
Related resources
Anonymous
a b V Motherboard
November 15, 2004 3:50:20 PM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

"xena" <10074317@spamtrap.ac.uk> wrote in message news:<2vrcp2F2o7obhU1@uni-berlin.de>...
> Hi there
>
> I would be very grateful for any advice. My hubby's PC is broke and he is
> almost at the stage of throwing it in the pond so I'm gonna have a go at
> fixing it today whilst he's in work.
>
> It's a A7N8X-E Deluxe mobo, which was quite happily running an Athlon 2400+
> until hubby decided that he'd rather the 2800+ from my machine (he's got
> PC3200 memory but mine's only PC2100 so can't utilise the full speed of the
> 2800+).
>
> The 2800+ has always run fine in my machine (which has a A7N8X-X mobo), and
> is no running fine with hubby's ex-2400+. But when he put my 2800+ into his
> machine, it seems to have killed it.
>
> When you turn it on, the fans come on, but the processor doesn't seem to
> spin up and it doesn't activate the monitor, or put any lights on the
> keyboard or anything. I've unplugged the HDDs now, just in case, and I've
> also tried booting it without the RAM, but it's still the same.
>
> Full specs of the machine, in case they're relevant:
> Mobo: A7N8X-E Deluxe
> Processor: Athlon 2800+ (Barton 2.083GHz)
> Arctic Copper Silent CPU fan
> 450W PSU
> Radeon 9800 Pro 128MB Graphics card
> 2 x 512MB PC3200 RAM
>
> He's tried resetting the CMOS, and that didn't help.
>
> Any suggestions would be very gratefully received.
>
> Many thanks
> xena


Check for a bent pin. If a pin got bent in the reinsertion process, it
isn't going to work in any machine.

Arnie
Anonymous
a b V Motherboard
November 15, 2004 4:24:12 PM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

put the original 2500 back in to see if the mobo is still good.

"xena" <10074317@spamtrap.ac.uk> wrote in message
news:2vrcp2F2o7obhU1@uni-berlin.de...
> Hi there
>
> I would be very grateful for any advice. My hubby's PC is broke and he is
> almost at the stage of throwing it in the pond so I'm gonna have a go at
> fixing it today whilst he's in work.
>
> It's a A7N8X-E Deluxe mobo, which was quite happily running an Athlon
> 2400+ until hubby decided that he'd rather the 2800+ from my machine (he's
> got PC3200 memory but mine's only PC2100 so can't utilise the full speed
> of the 2800+).
>
> The 2800+ has always run fine in my machine (which has a A7N8X-X mobo),
> and is no running fine with hubby's ex-2400+. But when he put my 2800+
> into his machine, it seems to have killed it.
>
> When you turn it on, the fans come on, but the processor doesn't seem to
> spin up and it doesn't activate the monitor, or put any lights on the
> keyboard or anything. I've unplugged the HDDs now, just in case, and I've
> also tried booting it without the RAM, but it's still the same.
>
> Full specs of the machine, in case they're relevant:
> Mobo: A7N8X-E Deluxe
> Processor: Athlon 2800+ (Barton 2.083GHz)
> Arctic Copper Silent CPU fan
> 450W PSU
> Radeon 9800 Pro 128MB Graphics card
> 2 x 512MB PC3200 RAM
>
> He's tried resetting the CMOS, and that didn't help.
>
> Any suggestions would be very gratefully received.
>
> Many thanks
> xena
>
Anonymous
a b V Motherboard
November 15, 2004 4:47:36 PM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

"xena" <10074317@spamtrap.ac.uk> wrote in message
news:2vrj2pF2n3gvtU1@uni-berlin.de...
> I've just put the 2800+ processor in another board that we had lieing
> around (ASRock K7S8X) and it's exactly the same, which points to a
> processor fault I guess. Are they really that fragile that taking it out
> of my PC and putting it in hubby's could kill it?

Electrostatic discharge could have done it in. Did you observe proper
grounding techniques when you swapped the CPU?

Tom S
Anonymous
a b V Motherboard
November 15, 2004 10:15:19 PM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

"Henry1" <Henry1@mail2me.com> wrote in message
news:5v6md.15737$Ho4.553370@news20.bellglobal.com...
> put the original 2500 back in to see if the mobo is still good.

Yeh, we're gonna try that next. Really don't want to have mine out of
action as well tho, so gonna wait til Thursday when this assignment has to
be in.

If that don't work, we'll have a look at the hotflash.

Cheers
Anonymous
a b V Motherboard
November 16, 2004 12:00:59 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

"Arnie Berger" <aberger@u.washington.edu> wrote in message
news:97c4d1eb.0411151250.218b6bb0@posting.google.com...
> "xena" <10074317@spamtrap.ac.uk> wrote in message
> news:<2vrcp2F2o7obhU1@uni-berlin.de>...

> Check for a bent pin. If a pin got bent in the reinsertion process, it
> isn't going to work in any machine.

Hi Arnie

I've checked that, and there was one very slightly bent pin, but it's
straight now. Could be that still I s'pose...

Not sure why my 1333 processor didn't work in the mobo then though.

Thanks for your suggestions. I'm gonna try again tomorrow to fix it.

Cheers
xena
Anonymous
a b V Motherboard
November 16, 2004 12:22:21 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

You could always put the cpu back into yours and confirm its still ok, and
that the problem lies on his a7n8x. Apart from resetting cmos/bios, you can
also hold down INSERT to load default/automatically define cpu bios
settings, etc. Worth a try. Perhaps theres a voltage difference between the
two chips and the 2800+ requires more but bios isnt set to it?
It could also be a corrupted BIOS, which is likely from your info. If youre
up to it, and since u guys have basically the same boards, you could try a
BIOS hotflash.
Good luck.

"xena" <10074317@spamtrap.ac.uk> wrote in message
news:2vrcp2F2o7obhU1@uni-berlin.de...
> Hi there
>
> I would be very grateful for any advice. My hubby's PC is broke and he is
> almost at the stage of throwing it in the pond so I'm gonna have a go at
> fixing it today whilst he's in work.
>
> It's a A7N8X-E Deluxe mobo, which was quite happily running an Athlon
2400+
> until hubby decided that he'd rather the 2800+ from my machine (he's got
> PC3200 memory but mine's only PC2100 so can't utilise the full speed of
the
> 2800+).
>
> The 2800+ has always run fine in my machine (which has a A7N8X-X mobo),
and
> is no running fine with hubby's ex-2400+. But when he put my 2800+ into
his
> machine, it seems to have killed it.
>
> When you turn it on, the fans come on, but the processor doesn't seem to
> spin up and it doesn't activate the monitor, or put any lights on the
> keyboard or anything. I've unplugged the HDDs now, just in case, and I've
> also tried booting it without the RAM, but it's still the same.
>
> Full specs of the machine, in case they're relevant:
> Mobo: A7N8X-E Deluxe
> Processor: Athlon 2800+ (Barton 2.083GHz)
> Arctic Copper Silent CPU fan
> 450W PSU
> Radeon 9800 Pro 128MB Graphics card
> 2 x 512MB PC3200 RAM
>
> He's tried resetting the CMOS, and that didn't help.
>
> Any suggestions would be very gratefully received.
>
> Many thanks
> xena
>
>
Anonymous
a b V Motherboard
November 16, 2004 12:22:22 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

Same bios versions?


"Blaedmon" <ass@beamer.com> wrote in message
news:cna00i$2jdj$1@otis.netspace.net.au...
> You could always put the cpu back into yours and confirm its still ok, and
> that the problem lies on his a7n8x. Apart from resetting cmos/bios, you
can
> also hold down INSERT to load default/automatically define cpu bios
> settings, etc. Worth a try. Perhaps theres a voltage difference between
the
> two chips and the 2800+ requires more but bios isnt set to it?
> It could also be a corrupted BIOS, which is likely from your info. If
youre
> up to it, and since u guys have basically the same boards, you could try a
> BIOS hotflash.
> Good luck.
>
> "xena" <10074317@spamtrap.ac.uk> wrote in message
> news:2vrcp2F2o7obhU1@uni-berlin.de...
> > Hi there
> >
> > I would be very grateful for any advice. My hubby's PC is broke and he
is
> > almost at the stage of throwing it in the pond so I'm gonna have a go at
> > fixing it today whilst he's in work.
> >
> > It's a A7N8X-E Deluxe mobo, which was quite happily running an Athlon
> 2400+
> > until hubby decided that he'd rather the 2800+ from my machine (he's got
> > PC3200 memory but mine's only PC2100 so can't utilise the full speed of
> the
> > 2800+).
> >
> > The 2800+ has always run fine in my machine (which has a A7N8X-X mobo),
> and
> > is no running fine with hubby's ex-2400+. But when he put my 2800+ into
> his
> > machine, it seems to have killed it.
> >
> > When you turn it on, the fans come on, but the processor doesn't seem to
> > spin up and it doesn't activate the monitor, or put any lights on the
> > keyboard or anything. I've unplugged the HDDs now, just in case, and
I've
> > also tried booting it without the RAM, but it's still the same.
> >
> > Full specs of the machine, in case they're relevant:
> > Mobo: A7N8X-E Deluxe
> > Processor: Athlon 2800+ (Barton 2.083GHz)
> > Arctic Copper Silent CPU fan
> > 450W PSU
> > Radeon 9800 Pro 128MB Graphics card
> > 2 x 512MB PC3200 RAM
> >
> > He's tried resetting the CMOS, and that didn't help.
> >
> > Any suggestions would be very gratefully received.
> >
> > Many thanks
> > xena
> >
> >
>
>
Anonymous
a b V Motherboard
November 16, 2004 1:33:52 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

"xena" <10074317@spamtrap.ac.uk> wrote in message
news:2vrj2pF2n3gvtU1@uni-berlin.de...
>
<snip>> I've dug out my old Athlon 1333 and am just about to put it into
hubbys
> A7N8X-E Deluxe mobo to see if the mobo still works.
>
> I've been scouting around on the net and it looks like these mobos have a
> bad habit of dying :-(
>
> Thanks for the help so far!
> xena
>

Bloody men can't leave well enough alone! ;-)

Sometimes re-seating the memory works. I had an abit BE6 and if I so much as
breathed on the SIMMs while I was adjusting an IDE cable it would refuse to
boot till I pulled out the memory and reseated it.
Did he put the CMOS jumper back on the right way ;-).

Start from scratch, unplug everything and put in the last working CPU, 1
stick of memory and go from there.

Good luck.
Anonymous
a b V Motherboard
November 16, 2004 1:33:53 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

"Son of Blahguy" <snuh@whatsamatta.edu> wrote in message
news:4198be46$0$25769$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
>
> "xena" <10074317@spamtrap.ac.uk> wrote in message
> news:2vrj2pF2n3gvtU1@uni-berlin.de...
>>
> <snip>> I've dug out my old Athlon 1333 and am just about to put it into
> hubbys
>> A7N8X-E Deluxe mobo to see if the mobo still works.
>>
>> I've been scouting around on the net and it looks like these mobos have a
>> bad habit of dying :-(
>>
>> Thanks for the help so far!
>> xena
>>
>
> Bloody men can't leave well enough alone! ;-)

Oh, you wanna tell me about it??! My PC is rock solid cos once it's
working, I leave it alone and it stays working! I've lost count of what
hubby's broke by messing all the time... :o (

> Sometimes re-seating the memory works. I had an abit BE6 and if I so much
> as breathed on the SIMMs while I was adjusting an IDE cable it would
> refuse to boot till I pulled out the memory and reseated it.

Tried that with both sticks in turn

> Did he put the CMOS jumper back on the right way ;-).

Yep, and I've cleared it again since.

> Start from scratch, unplug everything and put in the last working CPU, 1
> stick of memory and go from there.

Will do, once mine's non-critical (i.e. after Thursday). He's doing house
DIY til then - lost without his PC! ;o)

> Good luck.

Cheers!! :o /
Anonymous
a b V Motherboard
November 16, 2004 2:58:48 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

On Mon, 15 Nov 2004 09:56:12 -0000, "xena" <10074317@spamtrap.ac.uk>
wrote:

>Hi there
>
>I would be very grateful for any advice. My hubby's PC is broke and he is
>almost at the stage of throwing it in the pond so I'm gonna have a go at
>fixing it today whilst he's in work.
>
snipped disaster
>
>He's tried resetting the CMOS, and that didn't help.
>
>Any suggestions would be very gratefully received.
>
>Many thanks
>xena
>

He did remove the mains lead before removing the CPU I hope? friend of
mine killed his CPU by not doing so also damaged the MB as well.
Anonymous
a b V Motherboard
November 16, 2004 9:40:03 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

Damn, well I guess the only thing which would be wise is to get any
immediate work done with the working pc and fool around with it afterwards.
With regards to the a7n8x family's working reputation - I havent had any
problems with mine that couldnt be solved easily. I'd have to concede the
only annoyance Ive had is BIOS corruption, but even thats very rare. You may
have already tried it, but try a 500w+ PSU.

"xena" <10074317@spamtrap.ac.uk> wrote in message
news:2vrj2pF2n3gvtU1@uni-berlin.de...
>
> "xena" <10074317@spamtrap.ac.uk> wrote in message
> news:2vrcp2F2o7obhU1@uni-berlin.de...
> > Hi there
> >
> > I would be very grateful for any advice. My hubby's PC is broke and he
is
> > almost at the stage of throwing it in the pond so I'm gonna have a go at
> > fixing it today whilst he's in work.
> >
> > It's a A7N8X-E Deluxe mobo, which was quite happily running an Athlon
> > 2400+ until hubby decided that he'd rather the 2800+ from my machine
(he's
> > got PC3200 memory but mine's only PC2100 so can't utilise the full speed
> > of the 2800+).
> >
> > The 2800+ has always run fine in my machine (which has a A7N8X-X mobo),
> > and is no running fine with hubby's ex-2400+. But when he put my 2800+
> > into his machine, it seems to have killed it.
> >
> > When you turn it on, the fans come on, but the processor doesn't seem to
> > spin up and it doesn't activate the monitor, or put any lights on the
> > keyboard or anything. I've unplugged the HDDs now, just in case, and
I've
> > also tried booting it without the RAM, but it's still the same.
> >
> > Full specs of the machine, in case they're relevant:
> > Mobo: A7N8X-E Deluxe
> > Processor: Athlon 2800+ (Barton 2.083GHz)
> > Arctic Copper Silent CPU fan
> > 450W PSU
> > Radeon 9800 Pro 128MB Graphics card
> > 2 x 512MB PC3200 RAM
> >
> > He's tried resetting the CMOS, and that didn't help.
> >
> > Any suggestions would be very gratefully received.
> >
> > Many thanks
> > xena
>
> Aw, this is so frustrating...!
> I really don't want to put the processor back in mine or flash from mine
> except as a last resort in case this one breaks too and we won't be able
to
> get on the net for advice then!! Plus I got an assignment to be in on
Weds!
>
> I've just put the 2800+ processor in another board that we had lieing
around
> (ASRock K7S8X) and it's exactly the same, which points to a processor
fault
> I guess. Are they really that fragile that taking it out of my PC and
> putting it in hubby's could kill it?
>
> I've dug out my old Athlon 1333 and am just about to put it into hubbys
> A7N8X-E Deluxe mobo to see if the mobo still works.
>
> I've been scouting around on the net and it looks like these mobos have a
> bad habit of dying :-(
>
> Thanks for the help so far!
> xena
>
>
Anonymous
a b V Motherboard
November 21, 2004 1:50:50 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

xena wrote:
> Hi there
>
> I would be very grateful for any advice. My hubby's PC is broke and he is
> almost at the stage of throwing it in the pond so I'm gonna have a go at
> fixing it today whilst he's in work.
>
> It's a A7N8X-E Deluxe mobo, which was quite happily running an Athlon 2400+
> until hubby decided that he'd rather the 2800+ from my machine (he's got
> PC3200 memory but mine's only PC2100 so can't utilise the full speed of the
> 2800+).
>
> The 2800+ has always run fine in my machine (which has a A7N8X-X mobo), and
> is no running fine with hubby's ex-2400+. But when he put my 2800+ into his
> machine, it seems to have killed it.
>
> When you turn it on, the fans come on, but the processor doesn't seem to
> spin up and it doesn't activate the monitor, or put any lights on the
> keyboard or anything. I've unplugged the HDDs now, just in case, and I've
> also tried booting it without the RAM, but it's still the same.
>
> Full specs of the machine, in case they're relevant:
> Mobo: A7N8X-E Deluxe
> Processor: Athlon 2800+ (Barton 2.083GHz)
> Arctic Copper Silent CPU fan
> 450W PSU
> Radeon 9800 Pro 128MB Graphics card
> 2 x 512MB PC3200 RAM
>
> He's tried resetting the CMOS, and that didn't help.
>
> Any suggestions would be very gratefully received.
>
> Many thanks
> xena
>
>
Whenever something like this occurs it is time to remove all the other
possibilities that could be wrong. Take all extra I/O cards that may be
in the PCI Slots and remove them. Then see if it will turn on and boot up.

Thy this first: Pull the memory out and and reinsert it. Then juggle
the cables. If your husband replaced the processor maybe he removed the
drive cables and put them back together wrong. This is common. Pin 1 is
the side with the red stripe. I think the blue end goes into the
motherboard, and the gray and black ends go to the drives. The Power
connectors have to be connected to the drives also. After that try
reseating the video card. There is a screw that holds it up and you
have to remove it, pull it out and seat it back in good. Sometimes the
video card is unseated a bit. Then try it out.

If that doesn't work I suggest taking it all apart and start over.
There is a slight possibility that the processor was installed
incorrectly or the processor overheated when it was turned on the first
time. So My suggestion is that you take it apart. This is a little
daunting at first but it is not difficult.

What sometimes happens is that there is some grounding going on. This
is when the back of the motherboard comes in contact with the mounting
plante or something else that grounds out a circuit to the mounting
plate ot to the metal frame of the case. To test it sometimes you need
to take the motherboard from the case completely. I usually have a
separate power supply when I do this. If you have a long table or a
kitchen table you can lay the case on its side and stretch the power
cable out to test it.

Lay the motherboard on a piece of cardboard and connect the power
supply. If you have the manual you can look this up or if you can
access the internet you can go to the Asustek website and download it.
You need to look up the position of the Power-On Pins that the case on
switch connects to. All you have to do is take a screwdriver and touch
those two pins and the motherboard should start up. Most likely it will
give you a beep or an oral message. If it does not the motherboard
the CPU, the Memory, or the power supply is bad.

You can try to put the old processor back on. If you pull the processor
off there should be some kind of pad or thermal grease on the heatsink.
Do not reuse a thermal pad. You can order some called Atric Silver. I
dont know what version they are up to I think there is artic silver 3
and artic silver 4. The thermal Grease allows the heat to transfer from
the processor to the heat sink. Throughly cleaning with 100% Alcohol is
the approved way to clean the processor. But I have just wiped it off
with clean cotton cloth like a cloth diaper. The proper way is with
alchohol of course. Then you have to apply some thermal grease.
Usually it only takes a dot that is spread out to a thin layer. The
processor is inserted just so, but there is one pin on one conrer that
is missing and that matches up with the socket. To remove or insert it
you have to lift the socket arm in the side. Normally if you press down
just a little and move it out and around the clip it will rise. All
the way verticle and the socket should insert easily or be easily
removed. It should not require much force.

Power Supply. Sometimes the power supply shorts out when you start a
comptuer back up. The power supply has 12V+-, 5v+-, 3.3v+- If any of
the voltage lines does not work the power supply will fail. It is
easier to just replace a bad one. However, sometimes it will appear as
if it is still working. For instance the 12v+- will work and the drives
and lights come on, but the processor will not work.

Processor Fan. If the processor fan is not plugged in the motherboard
will not start up. There is a place on the motherboard to plug it in.

Maybe something will help.
!