Can you please help me how to fix the BIOS ROM CHECKSUM ERROR. TO MY MOTHERBOARD (TRINITY 400 S1854 AGPX4-PCI-ISA) i reformat the windows NT version 4, and after i restart, the message come bios rom checksum error.. please insert system disk in drive A.. and i cant go to the bios set up..

TRY CLEAR CMOS IT CAN HELP.

Hi, you can download the bios file here:

http://support.asus.com/Download.aspx?SLanguage=en&m=P4V8X-X&p=1&s=15

Please select your windows version.
Select bios and click on global for download.
You have to unzip the file before you install it.

You might have to change the cmos battery out with
a new one:

So the bios can remember its settings.
Thats why you get a bad bios checksum.
A reminder flashing the bios with a wrong one WILL destroy the mainboard.

Hello there, I am the Expert that will be helping you today. My name is damnor01.

Welcome to Fixya.

Your computer mainboard supports Graphics Cards from both Nvidia and ATI Radeon.

You may use a standard PCI Graphics Card, that is the white slot.
OR
You may use a AGPX4 Graphics Card, that is the single brown slot.

Note: AGPX4 is faster than Standard PCI so use AGPX4 if you can.

So basically you need to install any AGPX4 Graphics Card in your computer.
Check the specifications when purchasing the graphics card to ensure that it is indeed an AGPX4 Graphics card.

Thanking you
damnor01

,HN,,HN

This link will show you the pinout for a UNIVERSAL power supply but it does not applyto Dells or Compaqs...
http://pinouts.ru/Power/atxpower_pinout.shtml

From the manual:

S1854 can support Celeron/ PII/ PIII CPU speeds of 300MHz through
750MHz.

Here is a link for the manual:

http://www.tyan.com/manuals/m_s1854_202.pdf


Thanks for using Fixya.

Hi Oliver, the most common error related to the message,
(Bios Rom Checksum Error). Someone has left a floppy disk in the floppy drive. Once the floppy disk has been removed press the reset button on the PC, your windows will start normally. Next place to look is in your bios.
Open your manual to page 27.
Enter your bios & go to the title Advanced BIOS Features. Check First, Second & Third boot devices they should be as follows. Floppy disk drive, CD-ROM drive & primary hard disk drive. If both of the above are ok than try clearing the cmos/bios by resetting the cmos jumper (JP1) location on page 5. Descriptions of page five on page 6. CMOS settings on page 9.
When your system restarts re-enter your cmos & reset up your bios settings. Lastly if none of the above has fixed the error message, than remove the cmos battery & check its voltage. It should maintain 3volts. If yours' is lower than 3volts replace the cmos battery. There is one other possible fix. It’s an option not given lightly. Flashing a cmos/bios is not recommended unless all other options have failed.
Bios link for the EliteGroup P4VMM2 V8.1
http://www.ecs.com.tw/ECSWebSite/Downloads/ProductsDetail_Download.aspx?detailid=436&DetailName=Bios&DetailDesc=P4VMM2%20%20(V8.1)&CategoryID=1&MenuID=82&LanID=0
Main web site;
http://www.ecs.com.tw/ECSWebSite/Products/ProductsDetail.aspx?CategoryID=1&DetailID=436&DetailName=Feature&MenuID=52&LanID=0

Good luck Oliver!
Mike

The rom you used to flash the bios may not have been the correct one for your mobo, or it did not complete the flash entirely. Try using the usb a drive to flash it again and/or revert back to an older version.

The bios upgrade procedure stopped at half , leaving the bios corrupted. The computer now cannot do a regular boot procedure, this is the reason why it cannot recognise some device. If you are still able to boot from floppy, you can restart bios upgrade procedure from floppy. Just download floppy version upgrade and re do setup. Even if you do not find latest bios version, just download a floppy upgrade that is working, so that you can restart your machine regularly , and then do the update to latest version.
If you are not able to complete the bios setup, the only way to fix your motherboard will be flashing the CMOS chipset with a chip programmer device that will reinstall bios straight into cmos chipset.
You can have this done at the service point, in this case consider also replacing your motherboard.

Regards

BOOT BLOCK COMPATIBLE VERSION VER .005
BAD BIOS CHECKSUM

CHECKING FOR CD ROM
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
NO CD-ROM FOUND
CHECKING FOR FLOPPY DISK
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
NO FLOPPY DISK FOUND

Does someone already fix this problem??????