Problem With BIOS on Motherboard

  • Thread starter Thread starter Chris Guimbellot
  • Start date Start date
C

Chris Guimbellot

Hello,

I have an PC that will not boot. Basically, when I try to boot the machine,
I hear two short beeps and the screen never comes on, so I can never see
what the PC is doing before the beeps. If I leave it on, I believe it resets
itself and starts over because the two short beeps repeat about every 30
seconds. The motherboard is an Intel D845BG. I pulled the manual and looked
up the beep code. It lists the problem as "Parity cannot be reset".
Unfortunately for me, I don't know what parity is or why it cant be reset. I
searched the manual, but instructions/explanation. Any ideas? I would
appreciate any help on this. Thanks,

Chris
 
Hello,

I have an PC that will not boot. Basically, when I try to boot the machine,
I hear two short beeps and the screen never comes on, so I can never see
what the PC is doing before the beeps. If I leave it on, I believe it resets
itself and starts over because the two short beeps repeat about every 30
seconds. The motherboard is an Intel D845BG. I pulled the manual and looked
up the beep code. It lists the problem as "Parity cannot be reset".
Unfortunately for me, I don't know what parity is or why it cant be reset. I
searched the manual, but instructions/explanation. Any ideas? I would
appreciate any help on this. Thanks,

Chris
Click to expand...

Clear the CMOS
Check the battery
Try a PCI video card
Take voltage readings with a multimeter
Examine Capacitors for venting
Disconnect all non-essential parts (towards POSTing)
 
I tried the following:

switch the battery
changed to pci graphics card
pulled all non-essential parts

I do not know how to clear the BIOS. I tried the manual, but no luck. How do
you do it? Also, I do not know enough to take voltage readings and examine
capacitors (although I would love to learn). Any ideas on what I could try
now? If not, I guess I need to take it to get repaired. Thanks,

Chris
 
Chris Guimbellot said:
I tried the following:

switch the battery
changed to pci graphics card
pulled all non-essential parts

I do not know how to clear the BIOS. I tried the manual, but no luck. How
do you do it? Also, I do not know enough to take voltage readings and
examine capacitors (although I would love to learn). Any ideas on what I
could try now? If not, I guess I need to take it to get repaired. Thanks,

Chris
Click to expand...
Parity suggests you have a duff piece of memory as only memory has parity.


Chris
Technical director CKCCOMPUSCRIPT
Apple Computers, Intel, Roland audio, ATI, Microsoft, Sun Solaris, Cisco and
Silicone Graphics.
Wholesale distributor and specialist audio visual computers and servers
FREE SUPPORT @,
http://www.ckccomp.plus.com/site/page.HTM
(e-mail address removed)
 
Chris,

Thanks for the help. I did what you said and switch out the RAM. No luck
though. I am about at a loss here. Thanks,

Chris
 
Chris said:
Parity suggests you have a duff piece of memory as only memory has parity.


Chris
Technical director CKCCOMPUSCRIPT
Apple Computers, Intel, Roland audio, ATI, Microsoft, Sun Solaris, Cisco and
Silicone Graphics.
Wholesale distributor and specialist audio visual computers and servers
FREE SUPPORT @,
http://www.ckccomp.plus.com/site/page.HTM
(e-mail address removed)
Click to expand...
Nonsense. The CMOS RAM has a checksum. This is checked when the BIOS
starts up and if it's not right you will receive a "CMOS
parity/checksum/error" message.
 
I tried the following:

switch the battery
changed to pci graphics card
pulled all non-essential parts

I do not know how to clear the BIOS. I tried the manual, but no luck. How do
you do it? Also, I do not know enough to take voltage readings and examine
capacitors (although I would love to learn). Any ideas on what I could try
now? If not, I guess I need to take it to get repaired. Thanks,

Chris
Click to expand...

Clearing CMOS is done via jumper (consult the manual) or by
removing battery for a few minutes while AC power is
disconnected... when you switched the battery, if that
altered the clock back to a default date/time, then that did
clear CMOS.

Since you dont' yet know how to take voltage readings a
first step might be entering bios setup, health monitor page
(if one exists) and noting those readings, particularly the
5V, 12V, 3V, and CPU voltage.

As for capacitors, they should look regular, round and flat
tops. Swelling or cracked tops, liquid or dried residue
around the top or bottoms are signs of failure(s).
Generally those caps larger and near the CPU socket are the
main suspects, though others near video or memory slots are
also sometimes problematic.
 
Forgive me for sounding silly here. I would say i have an intermediate
knowledge of pc hardware so am i correct in thinking that the CMOS is the
motherboard memory & the battery keeps this memory alive whilst the AC power
is not connected.
 
Forgive me for sounding silly here. I would say i have an intermediate
knowledge of pc hardware so am i correct in thinking that the CMOS is the
motherboard memory & the battery keeps this memory alive whilst the AC power
is not connected.
Click to expand...

yes, unless it's cleared via jumper (or sometimes no jumper,
only two solder points) detailed in the manual)
 
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