|Not quite sure I understand the safe-mode situation. Are you saying that it will not boot even to safe-mde?|
Re' data/file safety/recovery...
Get yourself a Knoppix or Ubuntu disk and boot up with that. It will load the Linux variant into RAM only; and then you can access/copy files/data etc to optical-media, and/or another hard-drive. Verify the copies will read etc. on at least one other system, before proceeding to work on resolving problem(s) as posted
Then set about resolving current problem(s).
Knoppix.com, Ubuntu.com - both free ISO files which download/save to a hard drive; burn image (ISO) to a DVD; boot up with that DVD.
Ensure CD/DVD is first boot device of course when booting with the DVD.
re' Actual problems too... Power down; remove mains cable (in back )- so that no volts are going in.
Check all internal connections and ensure RAM is securely installed; also check all cards are simliarly installed... Perhaps remove each card in turn; clean edge connectors (with a soft pencil eraser) and then re-install the card(s); similarly RAM.
Power up again and see what happens?
Do you have a full version XP disk; or a recovery disk for system?