Could the errors be fixed by replacing the missing battery?

Or there could be some traces going to the keyboard connector eaten by corrosion from the old battery; please post a close-up picture of that area.

I have the same with a really tiny amount of battery leak and it needed a trace repair with the exact same symptom. So yes pay attention to the area around the battery, bottom side included.
I hope you fix it, it's a pretty fast motherboard.

Hi,
many thanks for your help. I check again all way repaired before and found one problem around choke L4. I repaired it. Now it is working 😀 Im really happy 😀
Photo is attached.

By the way .. Does anyone have an original User´s manual for this motherboard? I found this link where the manual could be downloaded, but I don't think people are active anymore.
http://www.amoretro.de/2012/02/unichip-367c-u … otherboard.html

Thanks a lot again,
David

I can see a solder trail shorting two leads of transistor exactly besides the battery holder.

Cheers,

pentiumspeed wrote on 2020-11-18, 20:06:

I can see a solder trail shorting two leads of transistor exactly besides the battery holder.

Cheers,

Hi, thanks for your replay. Can you mark it on the photo?
Thanks, David

I said right besides the battery holder (dead center of holder's) on solder side.

Cheers,

pentiumspeed wrote on 2020-11-18, 21:05:

I said right besides the battery holder (dead center of holder's) on solder side.

Cheers,

Im sorry. I dont know what you mean... I cannot see it.
David

I can see two potential shorts

debs3759 wrote on 2020-11-18, 21:32:

I can see two potential shorts

Thanks for you replay. Places you marked are ok.
David