For MSI MS-6309 VER: 2 motherboard, today I made a nice progress, after fixing the JBAT1 jumper (put back on 1-2), I started doing the usual research to see if there was the voltage of ST -BY, in fact it was present in every pin, then without wanting to check the PWRSW_ON pin, I made contact between the two pins and the MB turned on !!!
Unfortunately I had no keyboard or video card connected, so I could only see some POST CARD codes, until they stopped on d1 d0.
These codes are important as we will see later, checking the manual, maybe if I understand correctly it stops on d1 because the keyboard is not connected, I turn off and connect the video card too.
Reboot and after a series of various codes displayed, they stop and I have a video signal together with two beeps, obviously this is normal since the CMOS has been cleared, by pressing F1 I enter the BIOS to check the various screens, I exit without memorizing and I press F2 to start the boot of the OS, but obviously not being present, the BOOT FAILURE message appears ...
I noticed that there are four LEDs on the motherboard, normally they should be green, but in some moments someone changes color and becomes red, depending on which are red on the manual it is written what it means, at the moment I have not checked, but this function I it looks similar to other PCs (Dell for example), the difference is that they are in an internal position, and therefore not easily visible.
I connect a drive, I use the usual IDE-CF adapter with a 256MB card, there is stored the DOS 5 and various diagnostic programs and for bench DOS, I boot into the BIOS, I go to IDE HDD AUTO DETECTION, but strangely it does nothing, that is, the screen returns to the STANDARD CMOS SETUP page and they are all selected on Auto, I remove the floppy A: 1.44MB since I do not connect it, I save and exit to restart. When I restart I get a block on the codes d1 d0, I turn off and on again the codes restart but they stop at 13 12, useless to wait, nothing is displayed on the screen.
The only way to restart the PC is to reset the CMOS, I don't know if this problem is due to a malfunctioning BIOS, or if, as it happened on a previous occasion, the BIOS has been updated but despite being the one for this MB the wrong one was used, I know there are different revisions and different NBs and SBs, so I'll have to check which BIOS is right for the MB, it might just be rewritten, for some reason it might be damaged?
I think the card was put away for this problem, so it's unusable, I'll try with a 3.5 HD ATA, in case it goes I would have solved, plugging in a floppy drive is not a problem, the only problem is if the BIOS stores the settings and the PC restarts, for the moment this is what I can do.
Obviously if there are suggestions, I invite anyone who has some ideas, it is not a battery problem because I used a new one, then it would be necessary to verify if the part of the circuit concerned works, for the moment I would say yes, on older PCs c 'were those chips like dallas or other, and it was clear that the problem was there, here I have no idea where the equivalent circuit is, maybe if I remember correctly it has been integrated in the SB, for now I consider it working, I would not go to look for faults where there are none.
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