A4000 doesn't recognize AGA properly!

[Robert1234]

It's possible that you have a hardware problem. My A4000 doesn't allow me to select AGA screen modes in workbench. The reason is the battery has leaked and damaged the motherboard. Have you checked for leaking battery/caps damage?

Weed

I'm not too experienced in A4000, but on the right side of the motherboard is a battery, and there is a kind of white semi-translucent liquid. So it's the battery leak, right?

[freqmax]

Sounds like it. Photo?

[Robert1234]

Will make photo in a couple of days (probably tomorrow). If this is a battery leak is there a way to fix it? What if the motherboard was corroded, is there a chance to bring it to full working condition with the AGA modes available?

[Djole]

Damaged boards by leaking batteries can be repaired, depending on the extend of the damage. Mostly, such repairs are done by removing the battery, cleaning the boards and bridging the damaged tracks. If the damaged tracks are on outer layers the repair is very easy, if the damage is in the inner layers, repairs can be tricky. Anyway if your battery has leaked be sure to remove it as soon as possible to avoid more damage.

[freqmax]

Any tip on chemical to neutralize the battery fluid with? (without frying the pcb..)

[Robert1234]

I attach the photos of the battery (leak).

[spaceman88]

I attach the photos of the battery (leak).

That's a coin battery, they ususaly don't leak. Is your motherboard a 4000CR version? Or did someone replace the leaky type with this?

[spaceman88]

Any tip on chemical to neutralize the battery fluid with? (without frying the pcb..)

I used vinegar, then baking soda then isopropanol alcohol to clean everything off.

[Robert1234]

That's a coin battery, they ususaly don't leak. Is your motherboard a 4000CR version? Or did someone replace the leaky type with this?

As previous owner of this Amiga told me this is a replacement battery of the old one. Do you see a leak on the photo? Because it seems that it's present.

[Oldsmobile_Mike]

As previous owner of this Amiga told me this is a replacement battery of the old one. Do you see a leak on the photo? Because it seems that it's present.

That looks like hot glue.  Poke it with your finger, it should be hard.  Of course it may also be hiding whatever damage might have occurred from the previous "barrel" type battery that was installed prior to the modification...

[spaceman88]

As previous owner of this Amiga told me this is a replacement battery of the old one. Do you see a leak on the photo? Because it seems that it's present.

I can't seem to blow the picture up big enough to be sure. I think I see some silicone sealant.

[lolof]

You can loose the AGA if the battery leaked and damaged one of the 2 first IC left from the battery(I think it is the second one but I am not sure). If the battery leaked and it was not properly cleaned, it means each IC lift up and clean the PCB under. Then with time the remaining acid can damage the ICs and/or tracks and avoid the A4000 to boot in AGA, only ecs would be possible. if I were you, I would first go to pref time and look if it is possible to save the time. If not, you have battery damages...

Yes, there was a leak.

[freqmax]

Looks like hot glue to me.