Can I add 1GB RAM to my Satellite A85-S107 along with the existing 256MB RAM? If so, where is the 2nd slot?

SOURCE: Toshiba a105-s101 memory install boot issue

okay guy i actually have the solution i had the same porbelm but now i have 2 gb or ram and my satellite rock now okay first the ram you bought is wrong and not compatible what you need is kingston ram with the same specs trust me i bought the centon stuff and call everywhere trying to get this to work i had toshiba sell me some kingston and rolled my eyes as i put it in but i powered it on and bam worked like a dream so if you want the 2gb you have to fork over the 29.99 each and you will be much happier

SOURCE: EXTENDING EXIST 2Gb RAM to 4Gb

hai ,frist u go to
start--my computer(right click it)---manage---disk management---

see your new hard disk & right click and shirnk volume

SOURCE: Memory upgrade not working

check front side bus for new ram & old ram ,sometimes if both are working on differant f.s.b. then also this can be happen

SOURCE: Can't upgrade memory past 1gb when max is 2gb

I have the same issue with my laptop. I have not been able to get the laptop to accept 2gb of memory yet, but I did find something that works. If you put your 512mb memory that works in the laptop and then add a 1gb stick in the second slot it works. Or at least it did for me. It's better than nothing. I am still trying to figure out how to get it up to the 2gb max. Will add a solution if I figure it out.

SOURCE: Adding memory to a a75-s211

How much memory did it have before you removed the 256Mb RAM?
If it had 756Mb RAM then the memory in the laptop has 512 Mb plus 256 Mb RAM modules, the 256Mb in the slot you can see and possibly 512Mb in a slot under the keyboard or soldered on the motherboard.
Therefore by removing the 256Mb and replacing with 1Gb memory module will give you a total of 1.5Gb