It looks like your laptop must be about 4 years old.
(judging by http://reviews.cnet.com/laptops/fujitsu-amilo-pro-v2030/1707-3121_7-31882176.html)
And if I understand you correctly, you received this laptop as a
bare-bones... no drive and no memory.
1. When you changed the memory, did you go into bios and make sure the bios settings were correct
(in other words, set according to the manufacturers specs for the new memory)?
2. How long did you run memtest?
Did you follow this guide carefully?
https://www.techspot.com/vb/topic62524.html
Please note that (unless you start getting errors reported) you will need to let this run a long time.
A good way of doing this is to let it run over night. In each 'pass" there are a series of eight memory tests that are run, each more complicated than the previous. You need to let it run a minimum of 7 passes, unless you start getting errors. If you have errors reported, you may want to re-run the test with only one stick of ram installed, checked each stick until you isolate those that are faulty. That way you can limit your replacement to those that actually need it.
3. Is the fujitsu disk the one that came with the computer, or from another fujitsu model?
If it is from a different system, then it may be trying to load drivers that will not work with your computer.
when it came to me there was no hard drive
4. What did the previous owner say about it?
Have you considered that the reason you now have the computer may be because there was a hardware problem that the previous owner could not resolve?
5. Is your new drive SATA or PATA/IDE? And are the jumpers properly set?
6. There may be a previous issue with the BIOS. Try resetting to factory defaults, before adjusting ONLY your memory settings per mfg specs.