Joe wrote:
>
> An old PCChips M747 motherboard won't boot after the BIOS was updated.
>
> Before the flash, the BIOS ID was:
> 61-1208-000747-00101111-071595-M747-M747V3.0-H Release 12/01/1998S
>
> After the update, it was:
> 61-0525-000747-00101111-071595-M747-M747V3.0-H Release 05/25/1999S
>
> I used the aminf332.exe flash utility. Before flashing, the utility
> said the flash part was Winbond 29C020-V2, and it said the newer BIOS
> tag, M747V3.0-H, matched the currently installed BIOS tag. After
> running, it said it was successful and automatically restarted the system.
>
> It lists the hard drive and CD drives, but then hangs.
>
> Clearing CMOS settings with the board jumper doesn't help.
>
> I can enter BIOS setup and change settings, but the system always hangs
> when trying to boot. I have changed the boot order; to boot floppy
> first, boot hard drive first, and boot CD first. It still hangs. I have
> also tried disabling each of the drives in BIOS setup and physically
> disconnecting each of the drives. And either way, the floppy light
> doesn't come on, and it doesn't try to read the floppy.
>
> The BIOS recovery procedure for this board, is to use a floppy with the
> BIOS ROM file renamed to AMIBOOT.ROM, and start the system while
> depressing CTRL-HOME. I did this with the old BIOS--1208s.ROM. It read
> the floppy for a while, the drive stopped, and the system beeped 4 times
> to indicate success, and then automatically restarted the system. The
> BIOS ID string is now back to what it was before. But the system still
> hangs at the same spot.
>
> After clearing CMOS using the jumper, it says the battery is low. I
> checked it, and it is low--about 2V. I have heard that some systems
> won't boot with a weak battery. Even though the system was working just
> before I flashed the BIOS, with the same battery, is there a chance the
> weak battery could now be causing the problem. The system was sitting
> unused and unplugged for several months before I tried to update BIOS.
The battery is an obvious thing to fix, and you're going to need
one anyway, if you expect your settings to be preserved, or the
RTC clock to work properly, when the computer is not powered.
If you wanted more evidence, as to where it is getting stuck,
a PCI Port 80 card stuffed in the PCI slot nearest the processor,
can be used to get POST codes. A POST code is a "progress indicator"
and not an error code. I haven't run into a case yet, where the output
from such a card, helped someone with a problem, but it remains
as another place you can get information about what is happening.
(Some of these, also have small LEDs for power monitoring...
This one can be plugged in an ISA port or a PCI port, which
is why it has two edge connectors on the card.)
http://www.elstonsystems.com/prod/pc...stic_card.html
The price on cards like that, varies wildly. Some people try to
sell them for $100.00, while the Ebay/Hong Kong route might
give you a card for $20.00. A local computer store is not likely
to give you a good price on one.
Paul