Amiga 4000 battery problem

[doctorq]

Hi guys, I hope you can help me out on this issue.

I got 3 A4k motherboards which all were broken at some time (none of them wanted to boot). I decided to get them all repaired at amiga.fr and he also did a splendid job on getting them to boot.

I also wanted him to fix the problem with the batteries so I was able to save my time changes for good on all 3 boards once again, so I didn't have to set the time every time I have made a reset. Unfortuanately he failed on this job doesn't want to fix it under the warranty.

As I don't want to spent more money on sending the boards back and forth, I now cry out for help on this forum.

This is how it is. I have bought a new NimH battery, and soldered it in (I know these are working as I have one axactly the same in my 4th A4k, and tested both batteries on that one). After I power up and run the Time prefs the save button is enable, and the time is set to xx May, 2002. This is the same for all 3 boards, even for those without a battery. If I save the time on the one with a bettery in it, the clock is reset when I reset the computer.

How can I fix this problem? I have tried to turn the small screw above the battery, but that didn't help. What to do next?

I hope someone can help me out on this one.

[doctorq]

@TjLaZer

Yeah, I wanted him to fix the battery problem on all boards, as well as getting them to run, but the bettery problem wasn't fixed That's the reason why I have made this topic.

@Castellen

Hopefully all I need to do is to run the proggy you told me about, as I'm not that god at using a soldering iron, so surface mounted chips isn't going to be replaced by me.

I will try to look through the two links, maybe something comes up that will help me.

[doctorq]

Hopefully I will be as lucky as you :-) But congratulations on fixing your motherboards.

[doctorq]

Hmm, didn't have much luck here. I downloaded the RestartClock utility and tried to run it. My clock was reset to sometime in 1978, but then I powered down the computer to put an other harddrive in it, and the clock is back to may 2002, so I still can't save the clock.

I can't see any broken traces, so I don't think that's the problem. I can see that the 3 + poles for the battery ends at R179, but I can't see a trace for the - pole. Don't know if there should be one, so please inform me.

I would be able to solder in a new chip if that is needed. Can't replace surface mounted chips though, so I don't hope that I have to do that. Can anyone tell me what to look for next?

[doctorq]