Hello, my TYAN S2468 Thunder K7X mobo started counting up memory, although quick boot mode was set. This takes a long time with 2GB.
CMOS reset with jumper did not fix it. Flashed BIOS with 4.04, rebooted - nothing. Power cycled, 2 beep codes, not 4, as expected: 1 long, 2 short.
Took everything out, get 1-3-3-1 for missing memory, as expected.
Menory is 2 strips of 1 GB each, registered etc. Put in memory, alternating strips and slots, always 1 long, 2 short beeps.
Removed battery, tests at 3.14V.
I know, it does not look good, just what is that strange beep code?
Thanks for your help, Eggert

one,long two,short Search for option ROM'S on checksum failuor??

http://www.phoenix.com/resources/bios-postcode.pdf

http://www.computerhope.com/beep.htm#08

http://www.amptron.com/html/bios.beepcodes.html

Phoenix beep codes are more detailed than other BIOS codes. It emits
three sets of beeps. For example, 1 -pause- 3 -pause 3 -pause-. This is
a 1-3-3 combo, and each set of beeps is separated by a brief pause. So,
you need to listen and count when your computer starts doing this.
Reboot and recount if you have to. Code beginning with 1, 2, or 3 beeps
are fatal.

1-1-3 CMOS write/read failure.
1-1-4 ROM BIOS checksum failure
1-2-1 Programmable interval timer failure
1-2-2 DMA initialization failure
1-2-3 DMA page register write/read failure
1-3-1 RAM refresh verification failure
1-3-3 First 64K RAM chip or data line failure
1-3-4 First 64K RAM odd/even logic failure
1-4-1 First 64K RAM address line failure
1-4-2 First 64K RAM parity failure
2-_-_ Any combo of beeps after two means that your system is reporting a
bad bit in the first 64K of memory

3-1-1 Slave DMA register failure
3-1-2 Master DMA register failure
3-1-3 Master interrupt mask register failure
3-1-4 Slave interrupt mask register failure
3-2-4 Keyboard controller test failure.
3-3-4 Screen initialization failure
3-4-1 Screen retrace failure
3-4-2 Search for video ROM in progress
4-2-1 Timer tick interrupt test in progress or failure.
4-2-2 Shutdown test in progress or failure
4-2-3 Keyboard test gate A20 failure
4-2-4 Unexpected interrupt in protected mode.

4-3-1 RAM test in progress or address failure >FFFFh
4-3-3 Interval timer Channel 2 test or failure
4-3-4 Time of day clock failure.
4-4-1 Serial port test failure
4-4-2 Parallel port test failure
4-4-3 Math coprocessor test or failure

Low 1-1-2 System board select failure
Low 1-1-3 Extended CMOS RAM failure