Reply 43 of 199, by Predator99
First a big thanks to MMaximus to send me this very nice (but not working) Suntac board!!! 😀
It is labeled "AMA-1240V1-D".
Bios is the Phoenix 3.10.22 as posted above.
As the board was not booting, I first tried the Supersoft ROMs. I tried 3 different CGAs, but no display. Beep codes are:
6-1 Cannot initialize monitor
6-2 ?
...
6-1 Cannot initialize monitor
3-3 CMOS RAM
...
3-4 Floppy adapter
Everything seems to be OK, except the Monitor...! Had no success in removing all socketed ICs or playing with the Jumpers. Also tried other RAMs.
Then I tried again with the original Phoenix BIOS. Post sequence is:
00
01
02
03
04
05
06
08
09
0d
20
21
22
23
25
27
28
29
2c
2b (Screen memory test failure) / Beep: long short long short
2e
34
35
00
3A
38 (Memory high address line failure at 01000-0A000 (non-fatal) / Beep: short short
00
This indicates an error accessing/adressing the Video memory? Tried several VGAs, same result. To my surprise, the board is up after finishing the POST. I can switch the keyboard LEDs and a reboot with Ctrl-Alt-Del works.
No idea at the moment, no damage visible except some minor battery corrosion. All LEDs on the POST card are OK.
Will continue trying, but any idea is welcome 😉