A4000 Memory Problem

[pan1k]

Now that i've traded my good A4000D, all I have left is my spare A4000D with a memory problem. Here's whats happening:

2MB in Chip Ram slot = ~700k avail ram
2MB in Chip Ram slot + 4MB = 3.9M Fast + 1.9MB Chip
2MB in Chip Ram slot + 4MB + 4MB = 900k Fast

Battery corrosion must of killed something. Is this easily repairable or should I take it out to the desert and set it on fire?

[pan1k]

Do you think you can fix it? :-D I know you are handy with the solderin' iron....