No beep - no post - with new barebones system

  • Thread starter Thread starter daviddschool
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daviddschool

I just got a bare bones system for Xmas with a Biostar MCP6P-M2 Socket
AM2 motherboard, 4800 AMD CPU, 250 gig HD, 2 gigs of RAM etc.
I put it together BUT I cannot get the monitor to connect (stop
blinking) and it does not BEEP or POST on BOOT. What happens is this:

The system turn on, the monitor continues to blink. After about 10-20
seconds, the computer shuts back down on its own. The screen never
comes on.

I have tried removing the RAM, floppy drive and HD; in other words, I
tried to different setups to see if something was amiss with any of
the parts. Still no POST or beep.

The CPU is getting hot, so I am hoping that the CPU is ok.
I wondered if the Mobo is shot, but I couldn't understand why the CPU
would get hot is the MOBO isn't working.

I tried a PCI-E video card as well as the built-in video and it gives
me the same result - no beep, no post. The monitor doesn't seem to
connect for some reason.

I took off the CLEAR CMOS jumper, moved it to another location, still
no go.

The fans go on, so the PSU seems to be ok. When the HD was connected,
that seemed to work fine as well, I could hear it go on, but the
computer does not seem to get to the BIOS for some reason.
I know it is barebones and I am aware of the fact that I might have to
return it. I was just thinking if there was something I could have
missed in all of this.
Thanks and merry Xmas.
 
The fans go on, so the PSU seems to be ok. When the HD was connected,
that seemed to work fine as well, I could hear it go on, but the
computer does not seem to get to the BIOS for some reason.
I know it is barebones and I am aware of the fact that I might have to
return it. I was just thinking if there was something I could have
missed in all of this.
Thanks and merry Xmas.
Click to expand...

Ok, I finally got it to POST - go to the BIOS and then it shuts down
again.
I have tried a SECOND PSU and found the same thing. I am not sure if
there is a loose wire in the motherboard or something, but each time I
boot, sometimes I get to the BIOS, sometimes it only boots for a few
seconds and then shuts down. I am not sure what the issue is, but
seeing it is Xmas day, I doubt I will be able to get a hold of a 3rd
PSU. What could cause a system to turn off and on like that?
 
daviddschool said:
I just got a bare bones system for Xmas with a Biostar MCP6P-M2 Socket
AM2 motherboard, 4800 AMD CPU, 250 gig HD, 2 gigs of RAM etc.
I put it together BUT I cannot get the monitor to connect (stop
blinking) and it does not BEEP or POST on BOOT. What happens is this:

The system turn on, the monitor continues to blink. After about 10-20
seconds, the computer shuts back down on its own. The screen never
comes on.

I have tried removing the RAM, floppy drive and HD; in other words, I
tried to different setups to see if something was amiss with any of
the parts. Still no POST or beep.

The CPU is getting hot, so I am hoping that the CPU is ok.
I wondered if the Mobo is shot, but I couldn't understand why the CPU
would get hot is the MOBO isn't working.

I tried a PCI-E video card as well as the built-in video and it gives
me the same result - no beep, no post. The monitor doesn't seem to
connect for some reason.

I took off the CLEAR CMOS jumper, moved it to another location, still
no go.

The fans go on, so the PSU seems to be ok.
Click to expand...

The PSU is an active component. Fans and LEDs are very forgiving. Even a
bad power supply will usually run fans and light up LEDs.

Your symptoms seems to suggest one of the following:
1) Your power supply is defective and/or too weak to handle your new
hardware. Any good name-brand power supply of about 400W or more should
handle your system OK, assuming a single video card is installed. But that
also assumes that the power supply is fairly new (they get "weaker" as the
caps age)
2) Considering a new build, a good possibility is that the power supply
isn't compatible with the mainboard and/or you missed a connection. For
your specific motherboard, you need a *24* pin power connector (not 20) plus
a 4-pin power connector. A common mistake is to forget the 4-pin connector,
which would lead to the exact symptoms you write about.

I'm almost afraid to ask, but how do you know that the CPU is getting hot?
You shouldn't be able to feel the CPU with the cooler installed. But if the
cooler isn't installed, the CPU is now DEAD.

Best guess: double-check and triple-check the power connections from power
supply to mainboard. Then try a -known good- power supply. Known good
meaning, NOT the one you've tried already, but one that is either brand new
out of the box (probably good) or definitely is working in a similar
ystem. -Dave
 
If the CPU reaches a certain temp the BIOS would shut the system down.
You do have a Heatsink/Fan on that CPU??
and the fan is running?? and its plugged into the CPU fan header on the
mobo??

peter
 
Ok, I think I have discovered the issue, much like what you have
mentioned. I don't have a CPU fan on it. I looked in the box and it
didn't come with one. It makes sense - when I leave it to cool, it
boots for a while to the BIOS, but when I try repeated boots, it
doesn't get very far. Going to buy a CPU fan tomorrow. That is a
good thing, at least I have eliminated other possibilities, even
though it is going to cost me about 30-40 dollars more.
 
Ok, I think I have discovered the issue, much like what you have
mentioned.  I don't have a CPU fan on it.  I looked in the box and it
didn't come with one.  It makes sense - when I leave it to cool, it
boots for a while to the BIOS, but when I try repeated boots, it
doesn't get very far.  Going to buy a CPU fan tomorrow.  That is a
good thing, at least I have eliminated other possibilities, even
though it is going to cost me about 30-40 dollars more.
Click to expand...

I have the same motherboard and I had a problem with it not booting up
at first. I got it as a barebones kit from tigerdirect.

I DID have a CPU with fan and heatsink on, so that wasn't the problem,
although as the other poster said if you were trying to run the CPU
without a fan/heatsink its probably dead now.

What seems to be the issue with my board is that it will only POST
when only one stick of ram is in. Doesn't matter which stick or which
slot, as long as both slots aren't in use. Once I figured this out,
its been working fine ever since (although its a bit of a pisser).

So give that a shot, it might not be your CPU (if its not crispy fried
now).

I'm looking for info on why the mobo won't POST with both DIMMS in
use, but I"m not finding much so far. I might tweak the BIOS settings
and see if that helps.
 
I have the same motherboard and I had a problem with it not booting up
at first.  I got it as a barebones kit from tigerdirect.

I DID have a CPU with fan and heatsink on, so that wasn't the problem,
although as the other poster said if you were trying to run the CPU
without a fan/heatsink its probably dead now.

What seems to be the issue with my board is that it will only POST
when only one stick of ram is in.  Doesn't matter which stick or which
slot, as long as both slots aren't in use.  Once I figured this out,
its been working fine ever since (although its a bit of a pisser).

So give that a shot, it might not be your CPU (if its not crispy fried
now).

I'm looking for info on why the mobo won't POST with both DIMMS in
use, but I"m not finding much so far.  I might tweak the BIOS settings
and see if that helps.
Click to expand...

No it works fine after I got a CPU fan. The computer shuts down when
it gets too hot, so I wasn't worried about frying the CPU, it doesn't
seem to happen on newer computers. The RAM and everything else is
fine and the computer works great. My BIOS post 2 gig of ram, doesn't
yours?
 
cryuff said:
I purchased the same item. Im kind of a newbie to computer building .
leds wont light, i do not hear a beep.
I think it might be the power supply since the fan doesnt run.
Any help
Click to expand...
You DO have the power cord plugged into the power supply and a working
wall socket, yes? Then maybe the start pushbutton isn't talking to
the motherboard. The pushbutton should be connected across pins
15-16 on JPANEL1, located at the bottom/front corner of the m/b.
They are the pair of pins on the top row at the front of the m/b.
Remove the connector (that oughta be) on pins 15-16. Use a screwdriver
to momentarily short those pins on JPANEL. Does PSU fan start?
YES: bad start button or misconnection.

NO: disconnect all wiring to power supply. Have a look at the
24-pin connector on the power supply cable. Normally,the
motherboard signals the power supply to start by pulling the
green wire low (to ground). You can stand in by connecting a
jumper between the green-wire pin and either adjacent black-wire
(ground) pins. A piece of paper clip wire bent into a "U" does
well and can be added to your toolbox later. With the jumper
in place on the power supply cable connector, plug in the
AC power cord to the power supply. If the PSU fan spins,
the power supply is probably OK and the problem is missing
communications from the motherboard. Bad m/b? Maybe. More
likely a small assembly error by the newbie.
 
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