Toshiba satellite problem?

This is a reboot, and hopeful clarification of some of my previous questions. I have an older toshiba satellite A205 laptop running windows xp pro. The problem started over a year ago, where it would randomly shut down. Not shut down, but rather just turn off as if the power was pulled, with no shut down (on one moment, off the next). I had windows reinstalled, and the problem went away until recently.it started with the random shut down again a few days ago, now won't boot at all. Won't boot in any of the safe modes, regular mode, or last known good configuration. If I try to boot in regular mode, it goes to the windows boot screen, freezes, blue screens, then restarts. If I try to boot in any of the safe modes, durring the loading process it always gets stuck on harddrice(0)\partition2\windows\system32… then blue screens, and restarts. Another symptom is that when it gets stuck on avgidseh.sys the normal random blinking hard drive light becomes a flashing light (on, off, on, off in a slow regular fashon). I need to know if it is a dead hard drive, if I need to reload windows, or if its a motherboard problem. And also if I could test my hard drive by swaping in my mom's gateway laptop (not sure of model) running windows 7. If it works, then my hard drive is at fault, know what I'm saying? Also it has had several chargers, hashad this problem through all of them (so the charger isn't at fault). And it hasn't had a battery in it for a few weeks (battery won't take a charge anymore). When it was new, it was dropped a few times. Please excuse any spelling or grammar errors as I'm typing this on my phone